# US 7,743,805 B2 · Debarking tip assembly with replaceable cutting element

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- Number: US 7,743,805 B2
- Document ID: US7743805B2
- Status: Granted
- Kind: B2
- Application number: 11/818,518
- Filed: 2007-06-13
- Published: 2008-12-18
- Granted: 2010-06-29
- Earliest claimed: 2007-06-13
- Assignees: Nicholson Manufacturing Company
- Inventors: Jorgen Lefsrud
- Web page: https://patentgrep.com/patent/US7743805B2

## CPC

- B27L 1/08: using rotating rings
- B23B 27/1625: {with plate-like cutting inserts of special shape clamped by a clamping member acting almost perpendicularly on the chip-forming plane (B23B27/1644 takes precedence)}
- B23B 2200/163: discontinuous
- B23B 2205/16: Shims
- B27L: REMOVING BARK OR VESTIGES OF BRANCHES (forestry A01G); SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)

## Abstract

Apparatuses, systems, and methods for debarking logs are shown and described. The disclosed embodiments can be used for quickly and conveniently replacing contact surfaces of swing arm assemblies. Some disclosed embodiments include a swing arm assembly having a debarker tip assembly with a plurality of replaceable cutting elements for engaging logs moving along a processing line. Side-by-side cutting elements can be made of a wear resistant material for a prolonged life. A worn cutting element can be replaced with another cutting element to ensure proper functioning of the debarker apparatus.

## Claims

### Claim 1

A debarker tip assembly for a debarker apparatus, comprising:
a clamp assembly configured to be detachably coupled to a swing arm of the debarker apparatus, the clamp assembly manipulateable between an open configuration and a closed configuration, the clamp assembly comprising:
a clamp member comprising a mounting region and a retaining region, the mounting region configured to mate with a complementary portion of the swing arm;
a tip base dimensioned for placement between the clamp member and the swing arm such that a receiving channel is defined between the clamp member and the tip base when the clamp assembly is in the closed configuration; and
a cutting element dimensioned so as to fit within the receiving channel of the clamp assembly, the cutting element comprising:
a leading edge configured to remove bark from a log; and
a narrowed region dimensioned to nest in the receiving channel of the clamp assembly such that the cutting element is fixedly retained by the clamp assembly and the leading edge is exposed to engage the log.

### Claim 2 (depends on 1)

The debarker tip assembly of claim 1, further comprising:
at least one fastener that prevents under standing operating conditions the cutting element from being pulled out of the receiving channel when the at least one fastener is installed in a hole in the swing arm and the clamp assembly is in the closed configuration.

### Claim 3 (depends on 2)

The debarker tip assembly of claim 2, wherein the at least one fastener is dimensioned to extend through the tip base and at least a portion of the clamp member such that the at least one fastener adjusts clamp-up forces when the at least one fastener is operated.

### Claim 4 (depends on 1)

The debarker tip assembly of claim 1, wherein the mounting region of the clamp member comprises a keying feature and the tip base comprises an opening, the keying feature is configured to extend through the opening of the tip base and into a recess in the swing arm.

### Claim 5 (depends on 1)

The debarker tip assembly of claim 1, wherein the receiving channel and the narrowed region of the cutting element have complementary shapes such that an interference fit is formed between the receiving channel and the narrowed region when the clamp assembly is in the closed configuration.

### Claim 6 (depends on 1)

The debarker tip assembly of claim 1, wherein the tip base further comprises:
a heel that contacts a region of the clamp member that opposes the receiving channel such that a gap is formed between the clamp member and the tip base.

### Claim 7 (depends on 1)

The debarker tip assembly of claim 1, wherein the receiving channel defines an opening having a width that is less than a maximum width of the narrowed region.

### Claim 8 (depends on 1)

The debarker tip assembly of claim 1, wherein at least a portion of the cutting element comprises a hardened material.

### Claim 9 (depends on 8)

The debarker tip assembly of claim 8, wherein the hardened material is carbide.

### Claim 10 (depends on 1)

The debarker tip assembly of claim 1, further comprising:
at least one additional cutting element configured for placement in the receiving channel next to the other cutting element.