# US 2014/0196819 A1 · Tooth Assembly and Cutting Bits For Stump Grinder

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- Number: US 2014/0196819 A1
- Document ID: US20140196819A1
- Status: Published application
- Kind: A1
- Application number: 14/211,849
- Filed: 2014-03-14
- Published: 2014-07-17
- Earliest claimed: 2009-08-19
- Assignees: Leonardi Manufacturing Co., Inc.
- Applicants: Leonardi Manufacturing Co., Inc.
- Inventors: Joseph A. Leonardi; Bruce C. Jordan
- Web page: https://patentgrep.com/patent/US20140196819A1

## CPC

- A01G 23/067: {by comminuting the tree stumps}
- B02C 7/12: Shape or construction of discs
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)
- B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02})

## Abstract

A stump grinding wheel tooth assembly having a mounting block positioned around the periphery of the wheel and a cutting bit attached to the mounting block by a pin passing through a hole in the cutting bit and a corresponding hole in the mounting block and capped by a nut. The mounting block may support multiple cutting bits arranged into a predetermined patterns based on the location of the holes, such as pairs of cutting bits or even a quad formation. The cutting bits may be provided in various geometric configurations, such as round, triangular, square, rectangular, pentagonal, hexagonal, octagonal or decagonal.

## Claims

### Claim at position 1

1-26. (canceled)

### Claim 27

A bit assembly for use in a disc of a for a stump grinding machine, the disc comprising a peripheral edge and defining a central axis, a radial direction and an angular direction, the bit assembly comprising:
a first bit holder sized and shaped to be mechanically connected to the disc at the peripheral edge of the disc;
a first bit; and
a first connection hardware set structured and located to detachably mechanically connect the first bit to the first bit holder;
wherein:
the first bit extends beyond the first bit holder in the axial direction by a side clearance amount which side clearance amount is at least sufficient so that the stump grinding machine can perform the axial direction cutting characteristic of stump grinding machines.

### Claim 28 (depends on 27)

The assembly of claim 27 wherein the first bit extends beyond the first bit holder in the radial direction by a top clearance amount.

### Claim 29 (depends on 27)

The assembly of claim 27 wherein: the first bit holder is sized, structured and/or shaped to be at least partially received in a recess formed in the peripheral edge of the disc.

### Claim 30

A bit assembly for use in a tool including a rotating disc, the assembly comprising:
a bit;
a bit holder;
a connection hardware set; and
a shock absorber;
wherein:
the connection hardware set includes an elongated member that extends through the shock absorber and the bit holder and detachably mechanically connects the shock absorber and the bit to the bit holder; and
the shock absorber is structured to absorb shocks imparted to the bit in operation of the tool.

### Claim 31 (depends on 30)

The assembly of claim 30 wherein:
the bit defines a transverse cross-sectional profile;
the shock absorber defines a transverse cross-sectional profile; and
the transverse cross-sectional profile of the shock absorber is at least substantially co-extensive with the transverse cross-sectional profile of the bit.