Best Stump Grinder Wheel. Stump grinding wheel

18.05.2023 Boath best, stump, wheel, гриндер

US7216682B1. Split wheel stump cutter with replaceable tooth blocks and cutting teeth. Google Patents

Publication number US7216682B1 US7216682B1 US11/097,654 US9765405A US7216682B1 US 7216682 B1 US7216682 B1 US 7216682B1 US 9765405 A US9765405 A US 9765405A US 7216682 B1 US7216682 B1 US 7216682B1 Authority US United States Prior art keywords block wheel recess slot receive Prior art date 2001-12-31 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired. Fee Related. expires 2022-02-19 Application number US11/097,654 Inventor John T. Bennington Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) BENNINGTON JOHN W Original Assignee Bennington John T Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 2001-12-31 Filing date 2005-04-01 Publication date 2007-05-15 2001-12-31 Priority claimed from US10/035,991 external-priority patent/US6698477B1/en 2005-04-01 Application filed by Bennington John T filed Critical Bennington John T 2005-04-01 Priority to US11/097,654 priority Critical patent/US7216682B1/en 2007-04-23 Priority to US11/788,921 priority patent/US7367367B2/en 2007-05-15 Application granted granted Critical 2007-05-15 Publication of US7216682B1 publication Critical patent/US7216682B1/en 2011-11-04 Assigned to BENNINGTON, JOHN W. reassignment BENNINGTON, JOHN W. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BENNINGTON, JEAN M., EXECUTOR OF ESTATE OF JOHN T. BENNINGTON 2022-02-19 Adjusted expiration legal-status Critical Status Expired. Fee Related legal-status Critical Current

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Classifications

A — HUMAN NECESSITIES
A01 — AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
A01G — HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
A01G23/00 — Forestry
A01G23/02 — Transplanting, uprooting, felling or delimbing trees
A01G23/06 — Uprooting or pulling up trees; Extracting or eliminating stumps
A01G23/067 — Uprooting or pulling up trees; Extracting or eliminating stumps by comminuting the tree stumps

Y — GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10 — TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T — TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T407/00 — Cutters, for shaping
Y10T407/19 — Rotary cutting tool
Y10T407/1906 — Rotary cutting tool including holder [i.e., head] having seat for inserted tool
Y10T407/1932 — Rotary cutting tool including holder [i.e., head] having seat for inserted tool with means to fasten tool seat to holder

Y — GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10 — TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T — TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T407/00 — Cutters, for shaping
Y10T407/19 — Rotary cutting tool
Y10T407/1906 — Rotary cutting tool including holder [i.e., head] having seat for inserted tool
Y10T407/1934 — Rotary cutting tool including holder [i.e., head] having seat for inserted tool with separate means to fasten tool to holder

Abstract

A stump grinding apparatus having a split cutting wheel includes several replaceable cutter blocks secured to the periphery of the wheel. One or more replacement teeth are removably anchored in holes in each block and may also be mounted on holes in the side of the split wheel as well. The teeth are typically provided with a hardened cutting face, and are reinforced with an extension projecting back from the face. Each tooth includes a shank which fits into one of the holes. The shank contains a groove which receives a spring clip or a spring pin for securing the tooth in the hole. The wheel periphery contains individual recesses that are shaped to receive the cutter blocks. Each block includes means for insuring alignment of the block in the corresponding recess. The block is wedged tightly into its recess to reduce the likelihood of accidental removal.

Description

This application is a division of patent application Ser. No. 10/762,917, filed Jan. 22, 2004 now U.S. Pat. No. 6,877,535, which is a division of Ser. No. 10/035,991, filed Dec. 31, 2001, now U.S. Pat. No. 6,698,477 B1.

This invention relates to the field of cutting wheels useful for grinding tree stumps. specifically, it relates to a stump cutter assembly and the component parts thereof.

It is known to provide a stump grinding apparatus to cut and dispose of tree stumps. The device finds use for agricultural applications, for proper lawn maintenance and care, and for site development. It is often required to lower a protruding stump to a level that is below grade so that it will not interfere with plowing, disking and other farm tasks. For pleasing appearance of residential lawns, stumps of dead and fallen trees must likewise be cut away to a point that is below grade to allow for soil to be placed thereover for seeding or planting. When used for site development, the apparatus permits soil to be moved as needed.

Typically, such a device includes a rotatable grinding wheel having a plurality of cutting teeth disposed circumferentially about the wheel. The wheel can be powered by a chain drive, or by gear or belt, or may be at the end of a movable boom driven by a diesel or gasoline engine. The cutting teeth of the stump grinders commonly encounter more than just wood when performing their tasks. They are brought into contact with rocks and all manner of buried debris, such as re-bar, wire, cinder block and other materials of construction. Because of these hidden obstacles, the teeth are subject to considerable wear and breakage, and the peripheral surface of the cutting wheel experiences considerable wear as well.

The present invention relates to a stump cutting wheel assembly. The assembly comprises a wheel having a plurality of recesses spaced around the circumference thereof. A replaceable cutter block is inserted into each recess and is secured to the wheel. The block has a leading surface and a trailing surface, two sides colinear with the sides of the wheel, a top with a radius of curvature corresponding to that of the cutting wheel, and a bottom surface corresponding to the surfaces of the recess. A plurality of cutting teeth, each having a shank, is removably inserted into holes in the cutter block and/or the sides of the wheel. Each shank has a free end and an abutment end, the abutment end terminating in a rearwardly extending shoulder that co-operates with the block to serve as a stop to limit linear and rotational movement of the shank in the block or the wheel. An extension on the tooth projects rearwardly of the tooth face to rest against the adjacent surface of a block or the wheel to provide additional support for the tooth to resist shock and bending moments.

The cutting wheel is a split wheel having a first half and a second half joined to one other along the diametric surface thereof, each half having a semicircular cut-out in the diametric surface to permit the wheel to be mounted around a hub keyed on a drive shaft. The two halves of the wheel are joined together using clamping means comprising a pair of butterfly clamps. Each butterfly clamp fits in corresponding slots in both halves of the wheel. The clamp engages a bolt extending from the semicircular periphery along mating kerfs in the diametric surfaces. Preferably, the end of the kerfs immediately radially inward of the periphery is enlarged to form a shoulder which receives a sleeve through which the bolt passes.

Each cutter block includes means cooperating with a corresponding recess in the peripheral surface of the wheel to align the blocks with the rotational direction of the wheel. The cooperating means includes a slot in the bottom of the recess, a corresponding slot in the bottom surface of the block and a key aligning the two slots. The back surface of each recess forms an undercut angle, and the trailing surface of the block is co-planar therewith. A hole extends through each block from the top surface of the block to the bottom surface, and a threaded fastener such, as a bolt, passes through the hole for fastening the block into the recess of the cutting wheel. The bolt is threaded into a nut plate disposed in a slot in the wheel radially beneath the block. A generally V-shaped groove is formed between the front wall of the recess and the leading edge of the block, and a wedge is located between the two walls of the groove, and is secured to said nut plate with a second threaded fastener. The shank on each tooth includes a circumferential groove, and a spring clip or a spring pin engages the groove to anchor the tooth in a corresponding hole in the block or in the wheel.

The invention further relates to a split wheel for a stump grinder. The split wheel comprises a first half and a second half joined to one another along the diametric surfaces thereof. Each half has an axially positioned semicircular cut-out that allows the two halves to be assembled together. The two halves are assembled on a conventional hub using a pair of clamps, such as butterfly clamps. A slot is located inboard of the semicircular periphery of each half and extends in from each mating plane to receive one clamp. A groove along the mating surface joins each slot to the semicircular periphery to receive a bolt extending in from the periphery and threaded into one of the clamps to hold the two halves together. The groove includes a shoulder recessed beneath the peripheral surface to receive a sleeve which, in turn, receives the head of the bolt.

The split wheel further includes a plurality of recesses in the periphery thereof, each recess shaped to receive a removable cutter block. Each recess has a front edge, a bottom edge and a rear edge. A threaded block fastener is located near the front edge. The rear edge is undercut to conform to the trailing surface of the block. A circumferentially extending slot in the bottom of the recess is adapted to receive an alignment key engageable with a corresponding slot in the bottom of each block. The threaded block fastener comprises a slot radially inwardly of each recess, and a nut plate in the slot having a threaded hole to receive the block fastener. The nut plate includes a second threaded hole to receive a threaded fastener extending through a block wedge. Each half of the wheel includes a semicircular cut-out along the diametric surface on either side of the axially positioned cut-out, forming a non-axially located circular hole with the corresponding cut-out in the other half. A conventional mounting hub comprises two flanges bolted on either side of the wheel. A pair of holes extends through the two flanges aligned with the two non-axial holes in the wheel, and drive pins extends through these holes in the mounting hub. The mounting hub includes a keyway for mounting the wheel on the drive shaft.

The invention also relates to a replaceable cutter block adapted to be inserted into a recess in the periphery of the cutting wheel for a stump grinder. The cutter block has a top surface with a radius of curvature corresponding to the outer periphery of the cutting wheel. The block also includes a bottom surface that is co-planar with the bottom of the recess, two parallel side surfaces, a leading surface and a trailing surface. The trailing surface corresponds to the rear surface of the recess. At least one hole in the block receives a removable cutting tooth, the hole extending from the top surface or a side surface at an angle of inclination from the said surface toward the back surface of a block. The hole extends into the block toward the trailing surface at an angle of between about 30° and about 60°. The block includes means, such as a slotted key way adapted to receive a key extending longitudinally along the bottom thereof, to engage a corresponding alignment means in the bottom of the recess. A threaded fastener secures the block into the recess of the cutting wheel. This fastener comprises a bolt adapted to be threaded into a nut plate positioned in a slot within the cutting wheel radially beneath the block. The trailing surface of the block conforms to the rear wall of the recess and has an angle of less than 90° but greater than about 60° with respect to the bottom of the block.

The invention further comprises a cutting tooth to be removably engaged with a stump cutting wheel or a block on the circumference of such a wheel. The tooth comprises a planar cutting surface adapted to form an angle generally orthogonal to a side or a top of said block when the tooth is engaged therewith. It also includes a shank to be inserted into a corresponding hole in the block, said shank having a free end and an abutment end. The abutment end terminates in a shoulder formed at right angles to the shank and adapted to cooperate with the block to serve as a stop to limit the linear and rotational movement of the shank into the block. An extension projects rearwardly of the tooth face and is adapted to rest against the planar side or top surface of a block when the tooth is inserted into the block, said extension serving to provide a support for the tooth when in use. The shank typically includes a circumferentially extending groove and a spring clip engaging the groove for the purpose of providing a compressive fit of the tooth in the corresponding hole in a block. The shank forms an interior angle of between about 30° and about 60°, preferably about 45°, with respect to the cutting face of the tooth. The angle corresponds to the diagonal angle in the block or cutting wheel so as to provide the proper cutting angle for the face when the tooth is properly mounted.

FIG. 6 is a view of the teeth of the present invention and their relationship to the cutting wheel; and

The grinding wheel of the present invention is fabricated in two halves that are adapted to be held together by a butterfly type clamp. The halves are aligned in place by a wheel key which is held tight by a bolt going through the middle of the wheel key and the wheel, to the butterfly wheel clamp.

The grinding wheel also has removable wheel sections called blocks. These blocks are held in place in four ways. One, the wheel is machined with a cut-out specifically designed for the blocks to set into them. The wheel receives the block with the back and bottom face of the block fitting into it. The space between the front face of the block and the wheel is designed for a wedge to set into it. Two, a safety bolt goes through the block to a common nut plate or a nut in the wheel. Three, a wedge is set in between the wheel and front face of the block which is held in place by a bolt that goes through the wedge and into the common nut plate or nut in the wheel. Fourth, a key and keyway slips into the block and wheel. This is called a block key.

The wheel and the block have holes machined into them. Some are for the teeth and some for the bolts. Each hole is machined into the wheel in such a direction that, when the cutting tooth is inserted into it, the tooth will be at the appropriate angle for stump grinding. These holes are also machined to fit the design of the tooth in such a way that they are prevented from rotating or moving in the hole when the wheel is in motion.

The tooth has an extension on its top backside, which rests against the wheel or block. This gives support to the tooth and also keeps a tooth from turning when in motion. The tooth has a shank that goes into the wheel hole or block hole. The shank has a spring clip on it, which holds the tooth in tight.

All the teeth can be easily removed from a backside of the wheel or block. Teeth are removed with a punch and hammer. A block can be changed as needed by removing the wedge bolt and the block bolt.

Turning now to the drawings, FIG. 1 shows an exploded view of the stump grinder assembly 10 comprising a wheel 12, a plurality of cutter blocks 14, and a plurality of cutting teeth 16 inserted in holes in the top and sides of the cutter block and the sides of the grinding wheel. The wheel 12 is composed of two identical halves 12 a, 12 b joined to one another in the manner to be hereinafter described in greater detail in connection with FIGS. 2 and 3.

Each half of the wheel has a mating surface 20 along the diameter thereof and a peripheral surface 22. The two mating surfaces include an axially positioned semicircular cut-out 24 adapted to be mounted on a hub (not shown). A pair of smaller semicircular cut- outs 26 a, 26 b are located near the axial cut-out along the mating surfaces and are adapted to receive a pair of conventional drive pins (not shown) extending through flanges in the hub. Radially outwardly thereof are slots 28 a, 28 b for receiving butterfly clamps 30 a, 30 b. A pair of bolts 32 a, 32 b passes through annular wheel keys 34 a, 34 b to be threaded into the clamp. Grooves or kerfs 36 a, 36 b extend radially outwardly from the slots 28 a, 28 b to an enlarged opening 38 a, 38 b forming an abutment shoulder 40 a, 40 b. The bolt 32 passes through the annular key 34 into the clamp 30 and is tightened against the key, which abuts against the shoulder 40.

Turning now to FIGS. 4 and 5. the details of a removable cutter block 14 and the manner in which it is fastened to the wheel is shown. The block 14 includes a pair of parallel sides (one side 52 being shown), a leading surface 54, a trailing surface 56, a top surface 58 and a bottom surface 60. The top surface 58 has a radius of curvature that matches that of the periphery of the wheel 12. A recess 62 is machined, etched or molded into the periphery of the wheel, forming a front 64 and a rear 66 separated by a base 68. The trailing edge 56 of the block 14 and the rear 66 of the recess in the wheel 12 preferably form an identical angle with respect to the bottom 60 of the block and the base 68 of the recess that is less than 90°, preferably on the order of about 70°–85°. The leading edge 54 of the block 14 and the front edge 64 of the recess diverge, forming a V into which a wedge 70 is inserted and is secured in place with a wedge bolt 72. The wedge bolt is threaded into a bolt plate 74 or a nut (not shown) inserted into a slot 78 machined or otherwise formed in the wheel 12 radially beneath the recess 62 and the block 14. A second bolt 80 holds the block in place, while the wedge forces the block into tight engagement with the back edge of the recess. Circumferential alignment is maintained between the block 14 and the recess 62 by suitable means, such as an elongated slot 82 in the bottom of the block, a corresponding slot 84 in the base of the recess, and a slot key 86 engaging both slots.

One or more holes 88 are machined at an angle into the block 14 to receive the cutting teeth 16. The holes include a circular portion 90 that receives the shank of the tooth, and a generally square seat 92 against which the shoulder of the tooth abuts. The circular portion of the mounting hole typically extends through to the opposite side of the block 14 or the wheel 12 where it appears as an oval 18.

FIG. 6 shows two teeth 16 and a partial end view of the cutting wheel 12. The wheel is intended to rotate in the direction shown by the arrow. Each tooth 16 includes a planar cutting face 100, a tooth body 102, a cylindrical shank 104 having a free end 106 and an abutment end 108 which forms a generally rectangular shoulder 110 where it intersects the body 102 of the tooth. The shank 104 typically forms an angle between about 30° and 60°, preferably about 45°, with respect to the cutting face 100 of the tooth. The shank typically includes a groove 112, which is engageable by a spring clip 114 or a spring pin 116 (shown in FIG. 7 ). The tooth 16 includes an extension 118 projecting rearwardly from the tooth face 100. This extension includes a planar surface 120 that rests against the side of the wheel 12 when the tooth shank 104 is inserted into a tooth hole 88.

FIG. 7 shows the cutter block 14 in a perspective view with two cutting teeth 16 adapted to be inserted thereinto. Shown are the side 52, the leading edge 54, and the curved top 58 of the block. One hole 88 is shown in the top 58 and two holes are shown in the side 52 to receive the teeth 16. Each of these holes includes a shoulder 92 and a round portion 90 to receive the shank 104 of a tooth 16. A hole 94 extends vertically through the block 14 to receive a block bolt (not shown) and includes a shoulder 96 against which the head of the block bolt abuts. The tooth can be easily removed from a hole on the side of the block 14 or the wheel 12 by tapping the free end 106 of the tooth shank 104 with a hammer and a punch. The teeth on the top of the block are held by a spring pin 116 pressed into and extending through a hole 50 in the side of the block. These teeth can be easily disengaged from the block by driving out the spring pin and then tapping the free end of the tooth shank if it is accessible, or by prying it loose. The free end can be accessed by machining a hole through the sides of the block tangentially to the free end of the shank so that the shank can be tapped out.

The tooth is typically fabricated by suitable means, such as forging or casting. The face of the tooth preferably is made from a hard, impact resistant material, such as carbide steel brazed onto the body of the tooth.

As mentioned, the two halves of the wheel are assembled together around a hub with the two mating surfaces joined together. The butterfly clamp 30 is inserted into each of the slots 28, after which the bolt 32 is inserted through the key 34, and the groove 36 and is threaded into the clamp. When the two halves of the wheel are clamped together, a plurality of bolts is inserted into the holes 18 in the wheel and corresponding holes on the two flanges of the hub. The two holes formed by the cut- outs 26 a and 26 b are aligned with corresponding holes in the flanges. Drive pins are then inserted through the aligned holes so that the wheel is driven by the rotation of the hub on the shaft of a suitable power source. Instead of using drive pins, other drive means may be used, such as slotted wheel halves mounted on a splined drive shaft.

Typically, the number and placement of teeth in the cutter block and in the grinder wheel, as well as the angles and height of the cutting teeth with respect to the rotational direction of the cutting wheel, can be altered in accordance with established practices. Furthermore, other means, such as cotter pins, can be used for anchoring the teeth in the holes in the blocks and the wheel. Likewise, the number of removable cutter blocks and corresponding recesses in the cutter wheel can be increased or decreased depending on the overall size of the wheel and the blocks. The recesses normally should be evenly spaced around the periphery of the wheel for balance of the centrifugal forces during operation.

While the invention has been described in combination with embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing teachings. Accordingly, the invention is intended to embrace all such alternatives, modifications and variations as fall within the spirit and scope of the appended claims. For example, the recesses and the cutter blocks can be shaped so that the each block is secured to the wheel using a pair of block bolts front and back instead of using a block wedge. Furthermore, the alignment of the blocks with the wheel can be achieved by using a plurality of alignment pins instead of a key and slotted keyway.

The teeth of the present invention can be used with other types of cutter wheels such as solid wheels with improved results. Likewise, the blocks of the present invention can be mounted on unitary cutting wheels, thereby enjoying the benefit and ease of replacing the blocks when worn or broken.

Claims ( 10 )

The combination of a split wheel to be mounted on a shaft of a tree stump grinder, the wheel comprising a first half and a second half joined to one another along the diametric surfaces thereof, each half having an axially positioned semicircular cut-out corresponding to the diameter of the stump grinder shaft, and means for removably joining the two halves together comprising a pair of clamping means, a plurality of recesses in the periphery of the wheel, each recess having a front edge, a bottom edge, and a back edge, a slot radially inwardly of each recess near the front edge thereof, and a nut plate in the slot having a threaded hole, the back edge being undercut to conform to the trailing surface of a cutter block, each recess containing a removable cutter block, the cutter block having a top surface with a radius of curvature corresponding to that of the wheel, a bottom surface that is co-planar with the bottom of the recess, two parallel side surfaces, a leading surface and a trailing surface, the trailing surface corresponding to the rear surface of the recess, and a least one hole to receive a removable cutting tooth, the hole extending from the top surface or a side surface of the block at an angle of inclination from the said surface toward the back surface of a block, the threaded fastener comprising a bolt adapted to be threaded into a nut plate positioned within the slot in the recess of the cutting wheel.

The combination according to claim 1 wherein the split wheel includes clamping means comprising a pair of butterfly clamps, a slot inboard of the semicircular periphery of each half extending in from each mating plane to receive one clamp, a groove along the mating surface joining each slot to the semicircular periphery to receive a bolt extending in from the periphery and through a key and threaded into one of the clamps to hold the two halves together, and a shoulder recessed beneath the peripheral surface to receive the key and the head of the bolt.

The combination according to claim 1 further including a block wedge, wherein the nut plate includes a second threaded hole and a threaded fastener extending through said block wedge threaded into the nut plate.

The combination according to claim 1 wherein the split wheel includes a circumferentially extending slot in the bottom of each recess, a corresponding slot in the bottom of each block, and an alignment key engaging said slots.

For a stump grinder mounted on a shaft, a split wheel comprising first and second semicircular halves joined to one another along the diametric surfaces thereof, the first half having an axially positioned semicircular cut-out corresponding to the diameter of the stump grinder shaft, the second half having an axially positioned semicircular cut-out corresponding to the diameter of the stump grinder shaft, a pair of butterfly clamps for removably joining the two halves together, a slot inboard of the semicircular periphery of each half extending in from each diametric surface to receive one clamp, a groove along the diametric surface joining each slot to the semicircular periphery to receive a bolt extending in from the periphery and through a key, said bolt threaded into one of the clamps to hold the two halves of the wheel together, and a shoulder recessed beneath the periphery to receive the key and the head of the bolt.

For a stump grinder mounted on a shaft, a split wheel comprising first and second semicircular halves joined to one another along the diametric surfaces thereof, the first half having an axially positioned semicircular cut-out corresponding to the diameter of the stump grinder shaft, the second half having an axially positioned semicircular cut-out corresponding to the diameter of the stump grinder shaft, a pair of clamps for removably joining the two halves together, a plurality of recesses in the periphery of said wheel, each recess shaped to receive a removable cutter block and having a front edge, a bottom edge, and a back edge, a threaded block fastener near the front edge, the rear edge being undercut to conform to the trailing surface of a cutter block.

The split wheel according to claim 6 including a circumferentially extending slot in the bottom of the recess adapted to receive an alignment key engageable with a corresponding slot in the bottom of each block.

The split wheel of claim 6 wherein the threaded block fastener comprises a slot radially inwardly of each recess and a nut plate in the slot having a threaded hole to receive the threaded block fastener.

The split wheel according to claim 8 wherein the nut plate includes a second threaded hole to receive a threaded fastener extending through a block wedge.

The split wheel according to claim 6 wherein each half includes a semicircular cut-out along the diametric surface on either side of the axially positioned cut-out, whereby each cut-out forms a non-axially located circular hole with the corresponding cut out on the other half.

US11/097,654 2001-12-31 2005-04-01 Split wheel stump cutter with replaceable tooth blocks and cutting teeth Expired. Fee Related US7216682B1 ( en )

Priority Applications (2)

Application Number Priority Date Filing Date Title

US11/097,654 US7216682B1 ( en )	2001-12-31	2005-04-01	Split wheel stump cutter with replaceable tooth blocks and cutting teeth
US11/788,921 US7367367B2 ( en )	2001-12-31	2007-04-23	Replaceable tooth block for split wheel stump cutter

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title

US10/035,991 US6698477B1 ( en )	2001-12-31	2001-12-31	Split wheel stump cutter with replaceable tooth blocks and cutting teeth
US10/762,917 US6877535B1 ( en )	2001-12-31	2004-01-22	Split wheel stump cutter with replaceable tooth blocks and cutting teeth
US11/097,654 US7216682B1 ( en )	2001-12-31	2005-04-01	Split wheel stump cutter with replaceable tooth blocks and cutting teeth

Related Parent Applications (1)

Application Number Title Priority Date Filing Date

US10/762,917 Division US6877535B1 ( en )

2001-12-31

2004-01-22

Split wheel stump cutter with replaceable tooth blocks and cutting teeth

Related Child Applications (1)

Application Number Title Priority Date Filing Date

US11/788,921 Division US7367367B2 ( en )

2001-12-31

2007-04-23

Replaceable tooth block for split wheel stump cutter

Family Applications (2)

Application Number Title Priority Date Filing Date

US11/097,654 Expired. Fee Related US7216682B1 ( en )	2001-12-31	2005-04-01	Split wheel stump cutter with replaceable tooth blocks and cutting teeth
US11/788,921 Expired. Fee Related US7367367B2 ( en )	2001-12-31	2007-04-23	Replaceable tooth block for split wheel stump cutter

Family Applications After (1)

Application Number Title Priority Date Filing Date

US11/788,921 Expired. Fee Related US7367367B2 ( en )

2001-12-31

2007-04-23

Replaceable tooth block for split wheel stump cutter

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US4974649A ( en )	1989-11-28	1990-12-04	Ronald Manning	Tooth and holder assembly for a stump cutting machine
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US6325574B1 ( en )	2001-02-14	2001-12-04	Peter J. Treige	Machining slot cutter with removable cartridges
US6698477B1 ( en )	2001-12-31	2004-03-02	John T. Bennington	Split wheel stump cutter with replaceable tooth blocks and cutting teeth

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US4506711A ( en )	1982-12-14	1985-03-26	Robert Bosch Gmbh	Cutting roller
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US9168595B2 ( en )	2007-03-20	2015-10-27	Kennametal Inc.	Tool
US20100104382A1 ( en )	2007-03-20	2010-04-29	Markus Heinloth	Tool
US10757872B2 ( en )	2010-03-11	2020-09-01	Partners In Innovation Limited, Llc	Multi-functional and modular tree removal and maintenance apparatus and related methods
US8739843B2 ( en )	2010-03-11	2014-06-03	Partners In Innovation Limited, Llc	Multi-functional and modular tree removal and maintenance apparatus and related methods
US9604222B2 ( en )	2011-03-31	2017-03-28	Associated Mechanics Network, Llc	Cutter assembly for grinding and crushing machines
US10335798B2 ( en )	2011-03-31	2019-07-02	Gil Fredsall	Cutter assembly for grinding and crushing machines with replaceable cutting edges
US9038933B2 ( en )	2011-03-31	2015-05-26	Gil Fredsall	Cutter assembly for grinding and crushing machines
US9216461B2 ( en )	2011-07-19	2015-12-22	Iscar, Ltd.	Cutting body configured for fine-tuning and metal-working machine tool comprising a plurality thereof
US20130022414A1 ( en )	2011-07-19	2013-01-24	Iscar, Ltd.	Cutting Body Configured for Fine-Tuning and Metal-Working Machine Tool Comprising a Plurality Thereof
US9894848B2 ( en )	2013-01-11	2018-02-20	Vermeer Manufacturing Company	Stump cutter disc with recessed tooth s
US20140196818A1 ( en )	2013-01-11	2014-07-17	Vermeer Manufacturing Company	Stump cutter disc with recessed tooth s
US20190255728A1 ( en )	2016-06-15	2019-08-22	Kvarnstrands Verktyg Ab	Wood cutting tool and an arrangement for using said tool
US11034048B2 ( en )	2016-06-15	2021-06-15	Kvarnstrands Verktyg Ab	Wood cutting tool and an arrangement for using said tool
US20200015434A1 ( en )	2018-07-12	2020-01-16	Kennametal Inc.	Stump cutter tooth assembly
US10856474B2 ( en )	2018-07-12	2020-12-08	Kennametal Inc.	Stump cutter tooth assembly

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Effective date: 20190515

Best Stump Grinder Wheel

I have a SC60tx, SC50tx, and an SC372. My SC50tx grinder wheel is real beat up and ready to be replaced. I have heard a lot of mixed opinions on some of the after market stump grinder wheels, but I want to make the most informed purchase because I know whatever I put on, I will end up using for years. I have always just ran the wheels that come with the machine, I did switch years ago to the yellow jacket system, which is way better than the old pro style that I grew up using. I want to hear from people that have used yellow jacket teeth and switched to a different tooth style. I grind a ton of stumps, I really would like to cut down on the amount of teeth on the wheel and cost of teeth as well. I’ve consider green teeth in the past because they appear to be easier to sharpen. But the wheel itself I need to upgrade too! We have a Vermeer dealer where I am located and so that has been a big selling point to just stay with the vermeer teeth, so I don’t have to wait for shipping. Also, I’ve been told that you could eliminate a few sets of the s on the grinder and notice no difference in your performance, if anyone has done this, please let me know which ones and I’ll give it a shot before making a decision.

gorman

Addicted to ArboristSite

I use a Sandvik wheel, otherwise known as the Revolution. Same wheel, different manufacturers. I like it a lot cause it’s super efficient and the chip quality is fine and they don’t spray everywhere.

Chris P.

ArboristSite Lurker

I have a SC60tx, SC50tx, and an SC372. My SC50tx grinder wheel is real beat up and ready to be replaced. I have heard a lot of mixed opinions on some of the after market stump grinder wheels, but I want to make the most informed purchase because I know whatever I put on, I will end up using for years. I have always just ran the wheels that come with the machine, I did switch years ago to the yellow jacket system, which is way better than the old pro style that I grew up using. I want to hear from people that have used yellow jacket teeth and switched to a different tooth style. I grind a ton of stumps, I really would like to cut down on the amount of teeth on the wheel and cost of teeth as well. I’ve consider green teeth in the past because they appear to be easier to sharpen. But the wheel itself I need to upgrade too! We have a Vermeer dealer where I am located and so that has been a big selling point to just stay with the vermeer teeth, so I don’t have to wait for shipping. Also, I’ve been told that you could eliminate a few sets of the s on the grinder and notice no difference in your performance, if anyone has done this, please let me know which ones and I’ll give it a shot before making a decision.

We (Green Manufacturing) offer high production wheels for every machine you mentioned. If you are currently using the YJ’s, we do offer Greenteeth conversions using your existing stock wheel. If your 50tx wheel is worn out and needs to be replaced our Reverse-S wheel is a great option. We offer a 90-customer satisfaction guarantee on all our high-performance wheel kits.

Removing s to increase production or eliminate unnecessary teeth positions works great on a select few lower HP machines but it really depends on how the wheel was configured from the factory. If you were to remove positions on your higher HP machines, you would in return decrease your depth of cut without gaining much of an increase in production, for that reason I would not recommend it. The same would apply to your 372 and depending on which stock wheel you have this can also lead to balance issues.

Feel free to call me if you have any questions, I would be happy to explain in further detail.

New cutting system available for Vermeer stump cutters

Vermeer is enhancing its stump cutter product line with the introduction of the patent-pending Vermeer cutting system (VCS).

Designed for maximizing efficiency

The VCS incorporates a new tooth design that helps reduce rotation and a cutter wheel that reduces material from recirculating during operation. The VCS is available now on select new Vermeer stump cutters and will soon be available across the entire line, as well as an option for many existing models.

According to Matt Hutchinson, product manager for tree care, rental and landscape at Vermeer, the new VCS solves many of the challenges associated with traditional stump cutting systems. “Torquing cutter teeth daily is pretty common for most stump cutter users,” he explained. “Bolts that aren’t torqued properly tend to rotate in the. causing premature wear and impacting the performance of the cutter wheel. The tooth design on the VCS has a mounting and retention structure that helps keep teeth from shifting in the while absorbing the shearing force, instead of the bolt securing the tooth to the cutter wheel while operating. This design makes it possible to secure each set of teeth with a single long bolt and reduces the need for retorquing.”

The VCS two-sided carbide V-profile cutter teeth help enhance the cutting performance of the stump cutter and can be flipped to the other side of the cutter wheel for an extended wear life. The redesigned cutting wheel and tooth placement allows material to flow past the wheel after being cut, which reduces recirculation. Also, each side of the wheel is protected by wear plates made from high abrasion resistant steel.

With the new VCS and ever-popular, industry proven Vermeer Yellow Jacket cutting system, contractors now have more options to choose from. The VCS will be offered on larger Vermeer stump cutters soon, and across the entire line in the future.

For more information about the new Vermeer cutting system, contact your local Vermeer dealer or visit vermeer.com.

About Vermeer Corporation

Vermeer delivers a real impact in a progressing world through the manufacture of high-quality tree care and environmental, agricultural, underground construction and surface mining equipment. With a reputation for durability and reliability, that equipment is backed by localized customer service and support provided by independent dealers around the world. To learn more about Vermeer, products, the dealer network and financing options, visit vermeer.com.

Vermeer Corporation reserves the right to make changes in engineering, design and specifications; add improvements; or discontinue manufacturing at any time without notice or obligation. Equipment shown is for illustrative purposes only and may display optional accessories or components specific to their global region.

Products mentioned in this article

Stump Cutters

Since we invented the stump grinder in the 1950s, commercial tree care operations have counted on Vermeer.

Landscape

The answer to your landscape challenges can be found in Vermeer yellow.

Tree Care

Cut. Grind. Chip. Vermeer tree removal equipment is made for it.

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Vermeer expands its line of AX brush chippers with the new AX17 brush chipper model.

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Vermeer Corporation has entered into a distribution agreement with Conmeq Construction Equipment Machinery B.V., to supply Conmeq-branded electric mini skid steer loaders to be sold, serviced and supported through Vermeer industrial dealers in Europe.

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Vermeer Wisconsin, Vermeer Corporation and KS Energy gives young man battling cancer tools of the trade to start a landscaping business.

US20080245440A1. Stump grinding wheel. Google Patents

Publication number US20080245440A1 US20080245440A1 US12/061,143 US6114308A US2008245440A1 US 20080245440 A1 US20080245440 A1 US 20080245440A1 US 6114308 A US6114308 A US 6114308A US 2008245440 A1 US2008245440 A1 US 2008245440A1 Authority US United States Prior art keywords wheel wheel disc stump grinding grinding wheel Prior art date 2007-04-03 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number US12/061,143 Other versions US7743803B2 ( en Inventor James J. Paumier Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) NEW RIVER EQUIPMENT CORP Original Assignee NEW RIVER EQUIPMENT CORP Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 2007-04-03 Filing date 2008-04-02 Publication date 2008-10-09 Priority claimed from US90976007P external-priority 2008-04-02 Application filed by NEW RIVER EQUIPMENT CORP filed Critical NEW RIVER EQUIPMENT CORP 2008-04-02 Priority to US12/061,143 priority Critical patent/US7743803B2/en 2008-04-02 Assigned to NEW RIVER EQUIPMENT CORP. reassignment NEW RIVER EQUIPMENT CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PAUMIER, JAMES J. 2008-10-09 Publication of US20080245440A1 publication Critical patent/US20080245440A1/en 2010-06-29 Application granted granted Critical 2010-06-29 Publication of US7743803B2 publication Critical patent/US7743803B2/en Status Active legal-status Critical Current 2028-07-15 Adjusted expiration legal-status Critical

Images

Classifications

A — HUMAN NECESSITIES
A01 — AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
A01G — HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
A01G23/00 — Forestry
A01G23/02 — Transplanting, uprooting, felling or delimbing trees
A01G23/06 — Uprooting or pulling up trees; Extracting or eliminating stumps
A01G23/067 — Uprooting or pulling up trees; Extracting or eliminating stumps by comminuting the tree stumps

Abstract

A stump grinding wheel includes a wheel disc, which includes multiple recesses formed about its periphery. A peripheral cutter assembly is disposed in each one of the recesses and is mounted on the wheel disc. Multiple side cutter assemblies are mounted on the wheel disc, and each one includes a first and a second The first is disposed on one side of the wheel disc and the second is disposed on the other side of the wheel disc, and a wear pad is formed adjacent a selected end of each A cutting tooth is received in aligned openings formed in the first. the wheel disc, and the second A nut threadably engages the cutting tooth of the side cutter assembly to secure the tooth to the first and second s, and to secure the s to the wheel disc.

Description

This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/909,760, which was filed on Apr. 3, 2007.

The present invention relates to the art of grinding tree stumps and other materials. particularly, the invention relates to the art of wheels that are used to grind tree stumps and other materials. Still more particularly, the invention relates to wheels for grinding tree stumps and other materials that provide improved installation, positioning and orientation of cutting tools which are mounted on the wheel, thereby improving the performance and the life of the wheels.

In order to remove tree stumps and other similar materials from the ground during construction or other work, a stump grinder is typically used. The stump grinder usually includes a driven wheel, which is known as a stump grinding wheel, and specialized cutting tools are mounted on the sides and on the outer periphery of the wheel. When it is desired to remove a stump, the stump grinder is activated, thereby turning or rotating the wheel, and the cutting tools that are mounted on the wheel are brought into contact with the stump. As the wheel rotates, the cutting tools gradually cut and disintegrate the stump, thus removing the stump from the ground.

In the prior art, some particularly effective stump grinders have included cutting tools that have become known in the art as side cutter assemblies. A side cutter assembly typically includes pairs of cutting teeth, in which the teeth of each pair extend through the wheel in opposing directions. particularly, one tooth of a pair of teeth extends through the wheel so its respective cutting tip protrudes through one side of the wheel, and the other tooth of the pair extends through the wheel so its respective cutting tooth protrudes through the other side of the wheel. Each pair of teeth seats in a pair of mechanical s, each one of which is disposed on an opposing side of the wheel. A nut is threaded onto each tooth to securely clamp the teeth to the s, and in turn to clamp the s to the wheel. In the prior art, about twenty or more side cutter assemblies are mounted on the wheel in helical patterns to maximize cutting efficiency, and each side cutter assembly is mounted on the wheel in a generally circumferentially-extending orientation.

To increase the cutting ability of the stump grinding wheel, some side cutter assemblies have been modified to form peripheral cutter assemblies, which enable cutting teeth to be placed about and to extend from the peripheral edge of the wheel. This is typically accomplished by forming radial slots in the periphery of the wheel and securing the teeth in specialized mechanical s, which seat in the radial slots and typically are secured to the wheel by welding. These peripheral cutter assemblies are significant, since they typically make the initial contact with the stump, and also accomplish a significant amount of grinding due to the fact that they are mounted on the fastest-moving part of the wheel, that is, on the periphery of the wheel.

During use of the stump grinder, the fast-moving nature of the peripheral edge of the wheel subjects the wheel periphery and the peripheral cutter assemblies to extreme wear from abrasive materials that are trapped between the rotating wheel and the uncut portion of the stump. While the prior art helical mounting patterns of the circumferentially-extending side cutter assemblies create an excellent cutting pattern, they leave large areas of the periphery of the wheel unprotected, and thus vulnerable to such extreme wear. This wear undesirably shortens the life of the wheel. As a result, there is a need in the art for a stump grinding system that uses a with a new shape, which enables improved positioning, placement and orientation of the side cutter assemblies to protect the peripheral areas of the wheel and thus extend the life of the wheel.

A second disadvantage of prior art stump grinding wheels is the congested location of certain side cutter assembly s with respect to other side cutter assembly s and to the peripheral cutter assembly s. particularly, in order to optimize the amount of cutting performed by the wheel, side cutter assemblies are mounted in the above-mentioned helical patterns, which extend outwardly to the periphery of the wheel. Some side cutter assemblies may be mounted in close proximity to one another, and such close proximity of circumferentially-oriented assemblies may cause them to interfere with one another and create congested areas. In addition, certain side cutter assemblies are mounted along the periphery of the wheel between the peripheral cutter assemblies in a circumferentially-oriented manner, and the close proximity of the side cutter assemblies with the peripheral cutter assemblies may cause them to interfere with the welds that secure the peripheral cutter assemblies to the wheel, thereby creating additional congested areas. These congested areas may pack with dirt and pieces of the stump, which may in turn cause the wheel to undesirably become unbalanced. An unbalanced wheel often generates severe vibration and thus requires replacement, resulting in increased cost and lost production. As a result, there is a need in the art for a stump grinding wheel having improved positioning, placement and orientation of side cutter assemblies to reduce the potential for creating congested areas along the periphery of the wheel.

A third disadvantage of prior art stump grinding wheels is misalignment of the cutting teeth, which may be created by mounting side cutter assemblies in a circumferentially-oriented manner. particularly, with prior art stump grinding wheels, the cutting edges of the teeth on one side of a wheel typically are properly aligned to cut a stump, but the teeth on the opposite side of the wheel may not be properly aligned. As described above, a pair of teeth extends through the wheel, with each tooth of the pair extending in opposite directions, and the pair of teeth seats in a pair of mechanical s, each one of which is disposed on an opposing side of the wheel. Each tooth includes a cutting edge, which is typically a carbide edge, and optimally is aligned at a desired angle for easy cutting of a stump. This desired cutting angle is measured radially from the center of the wheel.

The circumferential mounting orientation of the side cutter assemblies often impedes uniform alignment of the cutting edges of the teeth, so that the cutting edges on one side of the wheel are undesirably disposed at different angles when compared to the cutting edges on the other side of the wheel. As a result, the cutting edges on one side of the wheel may be uniformly aligned, while the cutting edges on the other side of wheel are not, causing a considerable difference in cutting performance when using the cutting edges on one side of the wheel as compared to using the cutting edges on the other side of the wheel. For example, an operator of a stump grinder using a wheel with such cutting tools may experience smooth cutting when advancing the wheel into the stump one way, which uses the cutting edges on one side of the wheel that are properly aligned. However, when the operator advances the wheel into the stump from the opposite direction, which uses the cutting edges on the other side of the wheel that are not properly aligned, the wheel may bounce, vibrate and/or cut poorly. Such bouncing and vibration can cause damage to the stump grinding machine and lost production. Therefore, there is a need in the art for a stump grinding wheel that provides improved uniform alignment of the edges of the cutting teeth to enable optimum cutting by cutting edges on both sides of the wheel.

A fourth disadvantage of prior art stump grinding wheels is shifting of the alignment of the teeth when they are tightened down. particularly, each tooth of each side cutter assembly typically includes a square section that seats in a corresponding square recess in its respective mechanical When the tooth is inserted into the and tightened down with a nut, the square section of the tooth rotates slightly until a wall or corner of the square section meets and seats against a corresponding wall or corner of the recess in the As described above, the alignment of the cutting edge of each tooth is important. Such slight turning of the tooth in the may cause the cutting edge of the tooth to undesirably turn, resulting in the cutting edges of the teeth on one side of the wheel being at different angles from the cutting edges of the teeth on the other side of the wheel, as measured radially from the center of the wheel. This contributes to the above-described problem of the cutting edges of the teeth cutting well when the operator advances the wheel into the stump one way, but then cutting poorly when the operator advances the wheel into the stump from the opposite direction. As a result, there is a need in the art for a stump grinding wheel that enables the cutting teeth to maintain proper alignment as they are tightened down.

A fifth disadvantage of stump grinding wheels of the prior art is that, while the combination of side cutter assemblies and peripheral cutter assemblies on a wheel works well on large powerful machines, such an aggressive combination of cutter assemblies may cause the wheel to hang up or stall on smaller machines. particularly, the use of side cutter assemblies and peripheral cutter assemblies, which grab and dig into the stump as they cut, requires a significant amount of power in order to keep the wheel rotating. Since smaller stump grinding machines generate less power than larger machines, the smaller machines may not have enough power to keep the wheel moving as the aggressive combination of side cutter and peripheral cutter assemblies grabs and digs into the stump. In addition, sometimes a wheel having an aggressive combination of side cutter assemblies and peripheral cutter assemblies will move up or climb up on the stump that is being cut, which can upset or overturn a smaller stump grinding machine, potentially damaging the machine. Thus, there is a need in the art for a stump grinding wheel that provides for the optional use of a less aggressive combination of cutting assemblies when a smaller stump grinding machine is employed, while retaining the robustness of the cutting assemblies that are used on larger machines.

As a result, a need exists in the art for a stump grinding wheel that reduces or minimizes the above-described disadvantages. The stump grinding wheel of the present invention satisfies this need.

An objective of the present invention is to provide a stump grinding wheel in which the design of the s of the side cutter assemblies enables improved positioning, placement and/or orientation of the side cutter assemblies, thereby protecting from wear the peripheral areas of the wheel, the s of the peripheral cutter assemblies and the welds that secure the s of the peripheral cutter assemblies, while maintaining optimum cutting performance.

Another objective of the present invention is to provide a stump grinding wheel in which the design of the s of the side cutter assemblies limits interference of the side cutter assemblies with one another and with the welds of the peripheral cutter assemblies, thereby reducing the possibility of clogging the wheel with roots and dirt.

Yet another objective of the present invention is to provide a stump grinding wheel that includes s for the side cutter assemblies which can be mounted in an orientation that ensures the cutting edges of the teeth are generally at equal angles on each side of the wheel.

Still another objective of the present invention is to provide a stump grinding wheel that includes s for the side cutter assemblies that are mounted in an orientation which enables a manufacturer to optionally adjust the angle of the side cutter assemblies to achieve a more forward angle, known to those skilled in the art as a positive rake, to allow the side cutter assemblies to cut more aggressively using larger stump grinding machines, or to achieve a more backward angle, known to those skilled in the art as a negative rake, to allow the side cutter assemblies to cut less aggressively using smaller stump grinding machines.

Yet another objective of the present invention is to provide a stump grinding wheel in which the s of the side cutter assemblies include features that enable the end of the s to extend to various heights above the peripheral edge of the wheel, thereby enabling an operator to gauge the depth of cut for the teeth of the peripheral cutter assemblies.

Still another objective of the present invention is to provide a stump grinding wheel in which the depth of the cut that the side cutter assemblies will take from a stump is controllable.

Yet another objective of the present invention is to provide a stump grinding wheel in which the side cutter s and the cutting teeth that are mounted in the side cutter s include features that maintain the alignment of the teeth as they are tightened down.

These objectives and others are obtained by the stump grinding wheel of the present invention. In an exemplary embodiment of the invention, the stump grinding wheel includes a wheel disc which includes a first side, a second side opposing the first side, and an outer periphery extending between and interconnecting the sides. A plurality of recesses are formed in a periphery of the wheel disc, and a peripheral cutter assembly is disposed in each one of the recesses and is mounted on the wheel disc. A plurality of side cutter assemblies is also mounted on the wheel disk. Each one of the side cutter assemblies includes a first and a second The first is disposed on one of the first and second sides of the wheel disc and the second is disposed on the other of the first and second sides of the wheel disc. Each one of the s is formed with a wear pad adjacent a selected end of the A cutting tooth received in aligned openings that are formed in the first. the wheel disc, and the second A nut threadably engages the cutting tooth, and upon tightening of the nut, the tooth is secured to the first and second s, and the s are secured to the wheel disc.

The preferred embodiments of the present invention, illustrative of the best mode in which applicant has contemplated applying the principles, are set forth in the following description and are shown in the drawings, and are particularly and distinctly pointed out and set forth in the appended claims.

FIG. 2 is an elevational view of a cutting tooth that is mounted on the stump grinding wheel shown in FIG. 1 ;

FIG. 3 is a fragmentary cross-sectional view of a portion of the stump grinding wheel shown in FIG. 1 ;

FIG. 4 is an elevational view of a prior art of a side cutter assembly that is mounted on the stump grinding wheel shown in FIG. 1 ;

FIG. 7 is a side elevational view of a first embodiment stump grinding wheel of the present invention;

FIG. 8 is an elevational view of a first of a side cutter assembly that is mounted on the stump grinding wheel shown in FIG. 7 ;

FIG. 9 is an elevational view of a second of a side cutter assembly that is mounted on the stump grinding wheel shown in FIG. 7 ;

FIG. 10 is an end view of the shown in FIG. 8. with hidden parts represented by dashed lines;

FIG. 11 is an elevational view of a cutting tooth of a side cutter assembly that is mounted on the stump grinding wheel shown in FIG. 7 ;

FIG. 12 is a fragmentary view of the tooth shown in FIG. 11 seated in a cross-sectional view of the that is shown in FIG. 8. taken along line 12-12;

FIG. 13 is a side elevational view of a second embodiment stump grinding wheel of the present invention;

FIG. 14 is an elevational view of a first of a side cutter assembly that is mounted on the stump grinding wheel shown in FIG. 13 ;

FIG. 16 is an elevational view of a second of a side cutter assembly that is mounted on the stump grinding wheel shown in FIG. 14 ;

FIG. 17 is a side elevational view of a first side of the wheel disc of the stump grinding wheel shown in FIG. 13 ; and

FIG. 18 is a side elevational view of the second side of the wheel disc of the stump grinding wheel shown in FIG. 13.

In order to better understand the stump grinding wheel of the present invention, prior art stump grinding wheels and components of the wheels are shown in FIGS. 1-6. With reference now to FIG. 1. a first prior art stump grinding wheel is indicated generally at 10 and is adapted to be bolted to a rotary drive mechanism of a stump grinding machine (not shown) for rotation about a center axis of rotation A. First prior art stump grinding wheel 10 includes a wheel disc 12. Wheel disc 12 includes a pair of opposing side surfaces 14 a, 14 b ( FIG. 3 ) and a cylindrical outer peripheral surface or periphery 16, which interconnects the side surfaces. Mounted on wheel disc 12 are side cutter assemblies 18 and first prior art peripheral cutter assemblies 20.

particularly, each side cutter assembly 18 is mounted to wheel disc 12 in a generally circumferentially-extending orientation, and the side cutter assemblies form a plurality of generally helical patterns. With additional reference to FIG. 3. each side cutter assembly 18 includes a pair of s 22, with each being disposed on respective ones of the side surfaces 14 a, 14 b of wheel disc 12. Each side cutter assembly also includes a cutting tooth 24 and a nut 26. Each cutting tooth 24 passes through both of s 22, and each nut 26 serves to secure a respective tooth to the s, as well as to secure the two s to wheel disc 12.

As shown in FIG. 4. 22 is of elongated shape and includes beveled leading and trailing end surfaces 28 and 30, respectively. Extending through 22 are first and second through- holes 32 and 34, respectively. First through- hole 32 has a circular cross section, whereas second through- hole 34 is has a square cross-section and is formed with a generally spherical recess 36.

With reference now to FIG. 2. cutting tooth 24 includes a shank 38 of circular cross section and an enlarged head 40 disposed at one axial end of the shank. The other axial end of shank 38 is formed with an external screw thread 42 for receiving nut 26 ( FIG. 3 ). A first portion 44 of head 40 is formed with a spherical shape corresponding to that of spherical recess 36 that surrounds second through- hole 34. A second portion 46 of head 40 is formed with a square cross section, corresponding to the cross-sectional shape of through- hole 34. Head 40 is formed with a seat 48 in which a cutting tip or edge 50, which is formed of a hard material such as a carbide, is mounted by brazing or other techniques known in the art.

Returning now to FIG. 1. first prior art peripheral cutter assemblies 20 are partially similar to side cutter assemblies in that each peripheral cutter assembly includes a pair of s 52 through which two cutting teeth 24 project and are secured by respective nuts 26. However, s 52 are adapted to form a seat 54, which enables an additional cutting tooth 56 to extend outwardly of wheel peripheral surface 16.

Turning now to FIG. 5. in order to improve the mounting of cutting teeth on the perimeter of the stump grinding wheel, a second prior art stump grinding wheel was developed and is indicated generally at 70. Second prior art stump grinding wheel 70 includes a wheel disc 72, which is formed with a plurality of circumferentially spaced apart recesses 74 in a peripheral edge or periphery 76 of the wheel disc. Disposed in each recess 74 and mounted to wheel disc 72 is at least one second prior art peripheral cutter assembly 78, each of which includes a block 80 and a cutting bit 82 mounted on the block. As is known to those skilled in the art, second prior art peripheral cutter assemblies 78 of second prior art stump grinding wheel 70 are improved in construction and performance over first prior art peripheral cutter assemblies 20 of first prior art stump grinding wheel 10 ( FIG. 1 ). Second prior art grinding wheel 70 also includes side cutter assemblies 18, which are generally the same as those mounted on first prior art stump grinding wheel 10.

With reference now to FIG. 6. in a continuing effort to improve prior art peripheral cutter assemblies 20, 78, a third prior art stump grinding wheel was developed and is indicated generally at 100. Third prior art stump grinding wheel 100 includes a wheel disc 102 having respective slots or recesses 106 formed in a periphery 108 of the wheel disc, and a peripheral cutter assembly 104 mounted in each recess. Each peripheral cutter assembly 104 includes a holder 110 disposed in a respective one of recesses 106, a cutting tooth 112 mounted on the holder, and a nut 114 that secures the cutting tooth in the holder. Holder 110 is fixedly secured to wheel disc 102 by means known to those skilled in the art, such as by welding. Peripheral cutter assemblies 104 preferably include two different orientations of teeth 112 relative to wheel disc 102. That is, some peripheral cutter assemblies 104 include teeth that are angled toward one side of wheel disc 102, while other peripheral cutter assemblies include teeth that are angled toward the opposing side of the wheel disc, thereby optimizing the cutting efficiency of the peripheral cutter assemblies. Third prior art stump grinding wheel 100 also includes side cutter assemblies 18, which are generally the same as those mounted on first and second prior art stump grinding wheels 10, 70.

During use of prior art wheels 10, 70, 100, each respective peripheral edge or area 16, 76, 108 is subjected to extreme wear, as described above. Side cutter assemblies 18 and peripheral cutter assemblies 20, 78, 104, respectively, leave significant areas of each respective peripheral edge 16, 76, 108 unprotected and thus vulnerable to such extreme wear, which undesirably shortens the life of each prior art wheel 10, 70, 100. In addition, as best shown in FIG. 6. the mounting of prior art side cutter assemblies 18 near wheel periphery 108 in a circumferentially-oriented manner causes some of the side cutter assemblies to interfere with one another, while also interfering with the welds that secure peripheral cutter assemblies 104 to wheel disc 102. Such interference creates congested areas on prior art wheel 100 that pack with dirt and pieces of the stump, which may in turn cause the wheel to become undesirably unbalanced.

The use of generally circumferentially-oriented side cutter assemblies 18 on prior art wheels 10, 70, 100 also impedes proper or optimum alignment of cutting tips or edges 50 ( FIG. 2 ) of respective cutting teeth 24, as described above. Such alignment issues tend to cause an undesirable difference in cutting performance when cutting edges 50 on one side of prior art wheel 10, 70, 100 contact a stump, as compared to when the cutting edges on the opposing side of the wheel contact the stump. In addition, in prior art wheels 10, 70, 100, when each tooth 24 of side cutter assembly 18 is inserted into its respective 22 and tightened down with nut 26 ( FIG. 3 ), square portion 46 of the tooth ( FIG. 2 ) may rotate until a wall or corner of that square portion meets and seats against a corresponding wall or corner of square recess 34 formed in the ( FIG. 4 ), potentially creating further problems with the alignment of cutting edges 50.

over, the use of an aggressive combination of side cutter assemblies 18 and peripheral cutter assemblies 20, 78, 104 on prior art stump grinding wheels 10, 70, 100, respectively, tends to cause the wheels to undesirably hang up or stall on smaller stump grinding machines.

As a result, there is a need in the art for a stump grinding wheel that includes side cutter assemblies having s which provide improved positioning, placement and orientation of the side cutter assemblies to protect the peripheral edge of the wheel and reduce congested areas that are created along the peripheral edge of the wheel, provides improved alignment of the edges of the cutting teeth, maintains such alignment when the cutting teeth are tightened down, and provides optional use of less aggressive side cutter assemblies when a smaller stump grinding wheel or machine is used. The stump grinding wheel of the present invention satisfies this need.

Turning now to the drawings of the present invention, wherein the illustrations are for showing preferred embodiments of the invention, and not for limiting the same, FIGS. 7-12 show a first exemplary embodiment of a stump grinding wheel of the present invention, indicated generally at 200, and FIGS. 13-18 show a second exemplary embodiment of a stump grinding wheel of the present invention, indicated generally at 250.

With particular reference to FIG. 7. first embodiment stump grinding wheel 200 includes a wheel disc 202 which has two opposing sides 203 a and 203 b (203 b not shown), and a peripheral edge or periphery 204 that extends between and interconnects the sides. Slots or recesses 205 are formed in periphery 204 and sides 203 a,b of wheel disc 202 near the periphery, and peripheral cutter assemblies are disposed within respective ones of the slots and mounted to the wheel disc, as will be described in greater detail below. Preferred peripheral cutting assemblies include peripheral cutting assemblies 104, which are shown in FIG. 7 and are generally the same as those used in third prior art stump grinding wheel 100 ( FIG. 6 ).

particularly, each peripheral cutter assembly 104 includes a holder 110 disposed in a respective one of recesses 205, a peripheral cutting tooth 112 mounted in the holder, and a nut 114 which secures the cutting tooth in the holder. Holder 110 is fixedly secured to wheel disc 202 by means known to those skilled in the art, such as by welding. Peripheral cutter assemblies 104 preferably include at least two different orientations of teeth 112 relative to wheel disc 202. For example, some peripheral cutter assemblies 104 may include teeth 112 that are angled toward first side 203 a of wheel disc 202, while other peripheral cutter assemblies may include teeth that are angled toward second side 203 b of the wheel disc, thereby optimizing the cutting efficiency of the peripheral cutter assemblies.

Also mounted on wheel disc 202 are first embodiment new side cutter assemblies 206, which include improved s 208, 210 and side cutter teeth 222, as will be described in greater detail below. particularly, each side cutter assembly 206 is mounted to wheel disc 202 in a generally radially-extending orientation, rather than a circumferentially-extending orientation, and the side cutter assemblies form a plurality of generally helical patterns. The mounting of side cutter assemblies 206 in a radially-extending orientation takes advantage of the radial space available on wheel disc 202, thereby reducing the congestion of the side cutter assemblies relative to one another, and relative to peripheral cutter assemblies 104. With the reduced congestion enabled by radially-oriented side cutter assemblies 206, there is less opportunity for dirt to pack onto stump grinding wheel 200, thereby desirably improving the ability to keep the wheel balanced during operation.

With additional reference now to FIGS. 8-10. each side cutter assembly 206 includes a pair of separate corresponding s, that is, a first 208 and a second 210. For each pair, first 208 is disposed on one side of wheel disc 202, such as on first side 203 a, and second 210 is disposed on the opposing side of the wheel disc, such as on second side 203 b. In this manner, s 208, 210 cooperate with one another as they form part of each side cutter assembly 206. As shown in FIG. 7. depending on the specific arrangement of side cutter assemblies 206, certain ones of first side s 208 may be disposed on wheel disc first side 203 a, while corresponding second s 210 are disposed on wheel disc second side 203 b, and certain ones of the second s may be disposed on the wheel disc first side, while corresponding first s may be disposed on the wheel disc second side.

Each 208, 210 is of an elongated shape and includes a leading end 230, a trailing end 232, and a beveled edge or area 212 that extends about the periphery of the First and second openings or through- holes 214 and 216, respectively, preferably are formed in each 208, 210. First through- hole 214 preferably has a circular cross section, whereas second through- hole 216 preferably has a square cross section. A generally square recess 218 preferably is formed in each 208, 210 about second hole 216 to receive cutting tooth 222, and a generally round recess 219 preferably is formed in each about first hole 214 to receive a nut 228. In this manner, each tooth 222 passes through first and second s 208, 210 and through corresponding openings formed in wheel disc sides 203 a, 203 b (not shown), and when each nut 228 is tightened, side cutter assembly 206 is secured to wheel disc 202.

In each 208, 210, through- holes 214, 216 are located toward trailing end 232 of each respective. which creates a wear pad area 220 on each adjacent leading end 230. In first 208, first through- hole 214 preferably is adjacent trailing end 232, while second through- hole 216 preferably is adjacent wear pad 220. In second 210, second through- hole 216 preferably is adjacent trailing end 232, while first through- hole 214 preferably is adjacent wear pad 220. This configuration enables s 208, 210 to be installed in a cooperative manner on each side 203 a, 203 b of wheel disc 202.

Wear pad 220 on each 208, 210 is a generally smooth surface that is able to protect wheel disc 202 from extreme wear, particularly when combined with the radially-extending mounting orientation of side cutter assemblies 206. For example, as shown in FIG. 7. selected ones of side cutter assemblies 206 are able to be mounted on wheel disc 202 with wear pads 220 of s 208, 210 extending outwardly to, and even past, wheel periphery 204. Thus, the use of smooth wear pads 220 on radially-extending s 208, 210, enables the wear pads to provide increased coverage on wheel periphery 204, thereby reducing the amount of wear that is imposed on the periphery without additional components or cost.

Turning now to FIG. 11. cutting tooth 222 of side cutter assembly 206 includes a shank 234 with an enlarged head 224 at one end of the shank, and a threaded portion 236 at the other end of the shank for receiving nut 228 ( FIG. 7 ). Head 224 of cutting tooth 222 is formed with a square-tapered portion 226 corresponding to that of recess 218 formed in 208, as shown in FIG. 12. Shank 234 also includes a portion 238 adjacent square-tapered portion 226 which has a square cross section corresponding to that of second through- hole 216 in each 208, 210. Threaded portion 236 of shank 234 has a round cross section corresponding to first through- hole 214 in each 208, 210 ( FIGS. 8 and 9 ). A cutting tip or edge 240, which preferably is formed of a hard material such as a carbide, is mounted on head 224 via brazing or other techniques that are known in the art.

With reference to FIGS. 13-18. second embodiment stump grinding wheel 250 of the present invention is similar to first embodiment stump grinding wheel 200, and provides an additional advantage. particularly, as described above, first embodiment stump grinding wheel 200 includes side cutter assemblies 206 that each include pairs of separate first and second s 208, 210. With the use of two separate s 208, 210, it may be possible for a user to potentially re-install the s after removal for maintenance in a less-than-optimal manner. For example, a user may inadvertently re-install first 208 in a position that was designed for second 210, or vice-versa, which could result in a pattern of side cutter assemblies that reduces the cutting performance of stump grinding wheel 200 from the pattern as designed by the manufacturer.

As a result, second embodiment stump grinding wheel 250 of the present invention provides a means for re-installing the s of the side cutter assemblies on the wheel in a manner that maintains the optimum cutting pattern designed by the manufacturer. As second embodiment stump grinding wheel 250 is essentially the same in design and construction as first embodiment stump grinding wheel 200, only the differences between the second embodiment stump grinding wheel and the first embodiment stump grinding wheel will now be described.

Turning to FIG. 13. second embodiment stump grinding wheel includes side cutter assemblies 252, and each side cutter assembly in turn includes a pair of separate corresponding s, that is, a first 254 and a second 256. With additional reference to FIGS. 14-16. one of first 254 and second 256, for example, the first. includes a locating pin 258. As shown in FIGS. 17 and 18. each locating pin 258 is received by a corresponding locating pin opening or recess 260 formed in sides 262 a and 262 b of a wheel disc 264 of second embodiment stump grinding wheel 250. Wheel disc sides 262 a and 262 b are also formed with openings 266 for receiving teeth 222 in a manner similar to that as described above for first embodiment stump grinding wheel 200. Openings 260 for locating pins 258 do not pass completely through wheel disc 264, thereby ensuring that each first 254, which has the locating pin, may only be installed in predetermined locations on each wheel disc side 262 a, 262 b. In this manner, openings 260 for locating pins 258 are formed in a pattern in wheel disc sides 262 a and 262 b which cooperates with openings 266 formed for teeth 222 to assure proper re-installation of first and second s 254, 256 in the original pattern and orientation set by the manufacturer.

It is to be understood that the pattern of side cutter assemblies 206, 252 may vary depending upon specific design considerations. For example, one pattern of side cutter assemblies 206 is shown in FIG. 7 as mounted on first embodiment stump grinding wheel 200, and another pattern of side cutter assemblies 252 is shown in FIG. 13 as mounted on second embodiment stump grinding wheel 250.

First and second embodiments stump grinding wheel 200, 250 thus provide smooth wear pads 220 on radially-extending s 208, 210, 254, 256, which in turn provide an increased coverage of wheel periphery 204 that is not possible with prior art s 22 ( FIG. 4 ). particularly, since each prior art 22 includes a symmetrical configuration with holes 32, 34 being generally equidistant from the center of the. the holes are located near edges 28, 30. Such a location of holes 32, 34 near edges 28, 30 in the prior art prevents the formation of a surface area that is able to serve as a wear pad, which in turn prevents prior art s 22 from being effectively placed near wheel periphery 204, in contrast to the advantageous manner that is enabled by s 208, 210, 254, 256 of the stump grinding wheel 200, 250 of the present invention.

The placement of s 208, 210, 254, 256 with wear pads 220 up to and even past wheel periphery 204, as enabled by stump grinding wheel 200, 250 of the present invention, includes other advantages. For example, additional openings or holes can be formed in wheel disc 202, 264 to enable variable placement of s 208, 210, 254, 256 so that an operator can adjust the radial extension of the s relative to wheel periphery 204, thus limiting and/or controlling the depth of the cut of teeth 112 of peripheral cutter assemblies 104. Also, radial orientation of each side cutter assembly 206, 252 with wear pad 220 at wheel periphery 204 enables s 208, 210, 254, 256 to be located adjacent each peripheral cutter assembly 104, thereby acting as rakers to protect peripheral s 110 and the welds that secure the s to wheel disc 202, 264 from excessive wear, while maintaining a desirable helical pattern of side-cutting teeth 222.

The mounting of side cutter assemblies 206, 252 in a radially-extending orientation enables improved alignment of cutting edges 240 of teeth 222 of the side cutter assemblies. particularly, the prior art circumferential orientation of side cutter assemblies 18 on wheels 10, 70, 100 creates angles between cutting edges 50 of prior art teeth 24. These angles cause cutting edges 50 on one side of prior art wheels 10, 70, 100 to be properly and generally uniformly aligned with a line that extends radially from the center of each respective wheel disc 12, 102, 202 to each periphery 16, 108, 204 so that the cutting edges are effective. However, cutting edges 50 on the other side of each respective wheel 10, 70, 100 are not aligned with this radial line, and thus are not effective. The radial orientation of s 208, 210, 254, 256 of side cutter assemblies 206, 252 of stump grinding wheel 200, 250 of the present invention provides an orientation that enables adjustment of the angle and alignment of the s. Such adjustment in turn enables proper and generally uniform alignment of cutting edges 240 of teeth 222 with the radial line on both sides 203 a, 203 b of stump grinding wheel 200, 250, which provides smooth cutting when the cutting edges on either side of the wheel are used.

Side cutter assemblies 206, 252 of stump grinding wheel 200, 250 of the present invention also enable improved alignment of cutting edges 240 of teeth 222 as the teeth are tightened. particularly, as described above, the design of prior art side cutter assemblies 20 enabled teeth 24 to rotate upon tightening, often up to about seven degrees from the desired alignment position, thereby contributing to misalignment of cutting edges 50. In contrast, s 208, 210, 254, 256 of each side cutter assembly 206, 252 are formed with square recess 218 about square hole 216, and tooth 222 is formed with a corresponding square taper 226. Thus, when tooth 222 is tightened down in hole 216, square taper 226 on the tooth seats in square recess 218, and the tooth slides into the hole without significant turning or rotation. In this manner, tooth 222 remains centered and aligned as it is tightened, thereby maintaining the alignment of cutting edge 240.

It is to be noted that s 208, 210, 254, 256 may be formed as discrete units from wheel disc 202, 264 of stump grinding wheel 200, 250 of the present invention, or they may be integrally formed on the wheel disc. That is, holes 214, 216, and corresponding recesses 218, 219 may be formed in wheel disc 202, 264 whereupon tooth 222 is secured directly to the wheel disc. over, s 208, 210, 254, 256 may be of different sizes to accommodate more than two teeth 222, without affecting the overall concept or operation of the invention.

In addition, in stump grinding wheel 200, 250 of the present invention, features of the above-described design of teeth 222 of side- cutter assemblies 206, 252 may optionally be applied to teeth 112 of peripheral cutter assemblies 104. For example, cutting tooth 112 of peripheral cutter assembly 104 may be formed with a square taper that is similar to square taper 226 formed on tooth 222 of side- cutter assembly 206, 252. Holder 110 of peripheral cutter assembly 104 would then be formed with a square recess similar to square recess 218 about square hole 216 of side- cutter assembly 206, 252. Such construction for peripheral cutter assembly 104 would enable the alignment of peripheral cutting teeth 112 to be maintained as the teeth are tightened.

Furthermore, holder 110 of peripheral cutter assembly 104 may be formed as a discrete unit from wheel disc 202, 264, as described above, or the holder may optionally be integrally formed on the wheel disc. That is, rather than wheel disc 202, 264 being formed with recess 205 and holder 110 being disposed in the recess and welded to the disc, a recess may instead be formed in the wheel disc that is of a suitable size and shape to enable tooth peripheral cutting tooth 112 to be secured directly to the wheel disc. In such a design, tooth 112 may be formed with a square taper, and the recess would be formed in wheel disc 202, 264 with a corresponding shape to maintain the alignment of the cutting tooth as it is tightened. In this manner, such features and advantages described herein for side- cutter assemblies 206, 252 may also be applied to peripheral cutter assemblies 104 of stump grinding wheel 200, 250 of the present invention.

Stump grinding wheel 200, 250 of the present invention also provides an option to reduce the aggressiveness of side cutter assemblies 206, 252 for smaller stump cutting or grinding machines. That is, conventional flat- top nut 228 is replaced by an acorn or raker nut (not shown). The acorn or raker nut is a rounded nut that is higher than prior art flat-top nut 26 ( FIG. 3 ). Such a round-topped raker nut reduces the distance from the top of the nut to cutting edge 240 of a corresponding side cutter tooth 222, thereby limiting the depth of the cut into the stump by the cutting tip of the side cutter tooth. In addition, the rounded top of a raker nut is smoother and therefore less aggressive than prior art flat- top nut 26. These characteristics lead to a less aggressive cut by side cutter assemblies 206, 252 of stump grinding wheel 200, 250 of the present invention, which in turn requires less power to rotate the wheel, and thus is better for smaller stump grinding machines.

In this manner, stump grinding wheel of the present invention 200, 250 provides side cutter assemblies 206, 252 with s 208, 210, 254, 256 that have integrated wear pads 220, which reduce or prevent wear about wheel periphery 204, and protect from wear s 110 of peripheral cutter assemblies 104 and the welds that secure the s to the wheel, while maintaining a helical cutting pattern and orientation of side cutter teeth 222 for optimum cutting performance. In addition, the arrangement of side cutter assemblies 206, 252 in a radial orientation limits interference of the side cutter assemblies with one another and with the welds of peripheral cutter assemblies 104, thereby reducing the possibility of clogging wheel 200, 250 with roots and dirt.

The mounting of side cutter assemblies 206, 252 in a radial orientation also ensures that cutting edges 240 of side cutter teeth 222 are generally at equal angles on each side of wheel 200, 250 for smooth cutting with the edges on either side of the wheel. The use of square-tapered recess 218 in 208, 210, 254, 256 and a corresponding taper 226 on tooth 222 of stump grinding wheel 200, 250 of the present invention enables the alignment of cutting edges 240 to be maintained when the teeth are tightened.

Furthermore, the use of wear pads 220 on s 208, 210, 254, 256 of side cutter assemblies 206, 252 and the radial orientation of the side cutter assemblies enable holes 214, 216 of the s to align with different sets of holes that may be formed in wheel disc 202, 264. Such optional adjustability of side cutter assemblies enables wear pads 220 to extend to various heights above wheel periphery 204, thereby enabling an operator to gauge the depth of cut for peripheral cutting teeth 112. The radial orientation of side cutter assemblies 206, 252 of stump grinding wheel 200, 250 of the present invention also enables a manufacturer to adjust the angle of the side cutter assemblies to achieve a more forward angle of the cutter assemblies, known to those skilled in the art as a positive rake, to allow the side cutter assemblies to cut more aggressively using larger stump grinding machines, or to achieve a more backward angle, known to those skilled in the art as a negative rake, to allow the side cutter assemblies to cut less aggressively using smaller stump grinding machines. over, the optional use of raker nuts of selected heights to secure side cutter teeth 222 enables control of the depth of the cut of side cutter assemblies 206, 252.

Accordingly, the improved stump grinding wheel of the present invention is simplified, provides an effective, safe, inexpensive, and efficient structure which achieves all the enumerated objectives, provides for eliminating difficulties encountered with prior art stump grinding wheels, and solves problems and obtains new results in the art.

In the foregoing description, certain terms have been used for brevity, clarity and understanding; but no unnecessary limitations are to be implied therefrom beyond the requirements of the prior art, because such terms are used for descriptive purposes and are intended to be broadly construed. over, the present invention has been described with reference to exemplary embodiments. It shall be understood that this illustration is by way of example and not by way of limitation, as the scope of the invention is not limited to the exact details shown or described. Potential modifications and alterations will occur to others upon a reading and understanding of this disclosure, and it is understood that the invention includes all such modifications and alterations and equivalents thereof.

Having now described the features, discoveries and principles of the invention, the manner in which the stump grinding wheel is constructed, arranged and used, the characteristics of the construction and arrangement, and the advantageous, new and useful results obtained; the new and useful structures, devices, elements, arrangements, parts and combinations are set forth in the appended claims.

Claims ( 14 )

a wheel disc including a first side, a second side opposing said first side, and an outer periphery extending between and interconnecting said sides;

a peripheral cutter assembly disposed in each one of said recesses and mounted on said wheel disc; and

a plurality of side cutter assemblies mounted on said wheel disc, each one of said side cutter assemblies including:

a first and a second. said first being disposed on one of said first and second sides of said wheel disc and said second being disposed on the other of the first and second sides of the wheel disc, each one of said s being formed with a wear pad adjacent a selected end of the ;

a cutting tooth received in aligned openings formed in said first. said wheel disc, and said second ; and

a nut threadably engaging said cutting tooth, whereby upon tightening of said nut, said tooth is secured to said first and second s, and said s are secured to said wheel disc.

The stump grinding wheel of claim 1. wherein said s are radially oriented relative to said wheel disc.

The stump grinding wheel of claim 1. wherein the position of each one of said s on said wheel disc is radially adjustable relative to the wheel disc.

The stump grinding wheel of claim 3. wherein said wear pads of said s extend past said periphery of said wheel disc.

said wheel disc is formed with at least two openings, each one of said wheel disc openings being in alignment with a respective one of said first openings;

said second is formed with at least two openings, each one of said second openings being in alignment with a respective one of said first openings; and

at least two cutting teeth, each one of said cutting teeth being received in a respective one of said first openings, a respective one of said aligned wheel disc openings, and a respective one of said aligned second openings.

The stump grinding wheel of claim 1. wherein each one of said s is formed with a square opening and a square recess about said square opening, and said tooth includes a square taper corresponding to said square recess.

said first includes a first opening, said first opening being formed adjacent an end of the first and having a first shape, and said first includes a second opening, said second opening being formed adjacent said wear pad and having a second shape; and

said second includes a first opening, said second first opening being formed adjacent an end of the second and having said shape of said second opening in said first ; and said second includes a second opening, said second second opening being formed adjacent said wear pad and having said shape of said first opening in the first

The stump grinding wheel of claim 7. wherein said tooth includes a first portion having a cross sectional shape that corresponds to said first shape and a second portion having a cross sectional shape that corresponds to said second shape.

The stump grinding wheel of claim 1. wherein one of said first and said second is formed with a feature that mates with a corresponding feature formed on said wheel disc.

The stump grinding wheel of claim 9. wherein said feature formed on said is a pin, and said corresponding feature formed on said wheel disc is an opening.

The stump grinding wheel of claim 1. wherein said s are integrated into said wheel disc and said tooth mounts directly on the wheel disc.

The stump grinding wheel of claim 1. wherein said peripheral cutter assembly is integrated into said wheel disc, and a tooth of the peripheral cutting assembly mounts directly on the wheel disc.

Priority Applications (1)

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US12/061,143 US7743803B2 ( en )

2007-04-03

2008-04-02

Stump grinding wheel

Applications Claiming Priority (2)

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US90976007P	2007-04-03	2007-04-03
US12/061,143 US7743803B2 ( en )	2007-04-03	2008-04-02	Stump grinding wheel

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US12/061,143 Active 2028-07-15 US7743803B2 ( en )

2007-04-03

2008-04-02

Stump grinding wheel

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Owner name: NEW RIVER EQUIPMENT CORP., OHIO

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Owner name: NEW RIVER EQUIPMENT CORP.,OHIO

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Sources:

https://patents.google.com/patent/US7216682B1/en
https://www.arboristsite.com/threads/best-stump-grinder-wheel.330552/
https://www.vermeer.com/na/news/new-cutting-system-available-for-vermeer-stump-cut
https://www.google.com.pg/patents/US20080245440

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US7216682B1. Split wheel stump cutter with replaceable tooth blocks and cutting teeth. Google Patents

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Cited By (9)

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Cited By (15)

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