# US 8,146,474 B2 · Wood cutting saw chain and replaceable cutting members

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,146,474 B2
- Document ID: US8146474B2
- Status: Granted
- Kind: B2
- Application number: 12/125,289
- Filed: 2008-05-22
- Published: 2008-10-30
- Granted: 2012-04-03
- Earliest claimed: 2004-02-17
- Assignees: Indigo Innovators, Inc.
- Inventors: David Szymanski
- Web page: https://patentgrep.com/patent/US8146474B2

## CPC

- B27B 33/144: {having cutting inserts or exchangeable cutting teeth}
- Y10T 83/909: Cutter assemblage or cutter element therefor [e.g., chain saw chain]
- Y10T 83/913: With means permitting removal of cutter element
- Y10T 83/925: Having noncutting depth gauge
- Y10T 83/9329: Tooth separable from blade
- B27B: SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR (saws specially adapted for pruning or debranching A01G3/08; sawing apparatus specially adapted for felling trees A01G23/091; features not restricted to a particular type of wood saw B23D, e.g. attaching saw blades B23D51/00; machine tool frames, beds, pillars or like members, in general B23Q1/01)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A quick change cutting link of a saw chain for cutting wood comprises a base member adapted to be pivotally connected to other links of the saw chain. The base member comprises a seat surface. A cutting member comprising a “V” notch releasably engages the seat surface of the base member. Attached to the “V” notch is a carbide tip, including a cutting edge. The carbide tip is accurately placed in the “V” notch by mating with a small piece of metal in the “V” notch. The carbide tip is then sinterbrazed to the cutting member. The cutting member and seat surface may also comprise an inverted L-shaped protrusion and the other includes an inverted L-shaped recess for receiving the inverted L-shaped protrusion. The inverted L-shaped protrusion and recess may be designed so as to form a wedge.

## Claims

### Claim 1

A quick change cutting link for a saw chain for cutting wood, comprising:
a base member adapted to be pivotally connected to other links of the saw chain, said base member comprising a seat surface having a first taper,
a cutting member including a surface, said surface having a second taper extending along a length of said cutting member, said cutting member further including a V-shaped notch extending along a width of said cutting member, the V-shaped notch including a portion of powdered metal dispersed in a corner of said V-shaped notch at a location along only a portion of said width, wherein said second taper of the cutting member surface engages said first taper of said seat surface, releasably mounting and self-locking said cutting member to said base member, and
a carbide tip seated within said V-shaped notch, said carbide tip having a mating surface shaped cooperatively with said V-shaped notch, said mating surface including a detent receiving said powdered metal portion, wherein said base member, said cutting member, and said carbide tip comprise a single link.

### Claim 2 (depends on 1)

The cutting link of claim 1, wherein said carbide tip further includes a cutting surface.

### Claim 3 (depends on 1)

The cutting link of claim 1, wherein said portion of powdered metal is located in the deepest recess of said V-shaped notch opposite a leading edge of said cutting member.

### Claim 4 (depends on 1)

The cutting link of claim 1, wherein a sinterbrazing material secures said carbide tip to said cutting member.

### Claim 5 (depends on 4)

The cutting link of claim 4, wherein said sinterbrazing material comprises one of a powder and a paste.

### Claim 6 (depends on 1)

The cutting link of claim 1, wherein only one edge of the carbide tip is sharpened.

### Claim 7 (depends on 1)

The cutting link of claim 1, wherein one of said seat surface and said cutting member includes an inverted L-shaped protrusion and the other of said seat surface and said cutting member includes an inverted L-shaped recess for receiving said inverted L-shaped protrusion.

### Claim 8 (depends on 7)

The cutting link of claim 7, wherein one of said first taper and second taper forms a surface of said L-shaped protrusion.

### Claim 9 (depends on 7)

The cutting link of claim 7, wherein said first taper and said second taper form angles.

### Claim 10 (depends on 9)

The cutting link of claim 9, wherein at least one of the angles range from 0.5 to 45°.