# US 2010/0243106 A1 · Movable blade unit for wood cutting machine

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- Number: US 2010/0243106 A1
- Document ID: US20100243106A1
- Status: Published application
- Kind: A1
- Application number: 12/385,021
- Filed: 2009-03-30
- Published: 2010-09-30
- Earliest claimed: 2009-03-30
- Assignees: Michael Jeffrey Strother; Kuang Yung Machinery Co., Ltd.
- Inventors: Michael Jeffrey Strother
- Web page: https://patentgrep.com/patent/US20100243106A1

## CPC

- B27B 5/34: Devices for securing a plurality of circular saw blades on a single saw spindle; Equipment for adjusting the mutual distance {(arrangements for adjusting the mutual distances of circular saw machines for lengthwise sawing of trunks B27B7/04)}
- Y10T 83/7822: Tool pair axially shiftable
- Y10T 83/7847: Tool element axially shiftable
- Y10T 83/7876: Plural, axially spaced tool elements
- Y10T 83/9403: Disc type
- Y10T 407/1902: Gang
- 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 movable blade unit for wood cutting machine is mounted to the rotating shaft of the wood cutting machine and includes a blade and an inner ring which is located between the blade and the rotating shaft. A movable ring is connected to the movable blade unit and includes a flange, an outer collar and the inner ring, wherein the flange is connected to the outer collar which is rotatably connected to the inner ring. The inner ring is mounted to the rotating shaft and a gap is defined between the inner ring and the rotating shaft. The inner ring includes multiple sets of rotating members which are in contact with the grooves in the rotating shaft so that the inner ring is rotatable and movable relative to the rotating shaft with little or reduced friction.

## Claims

### Claim 1

A blade unit for wood cutting machine, comprising:
an axle being a rotating shaft;
multiple first blades connected to at least one first positioning collar which is mounted to the rotating shaft, the rotating shaft including multiple grooves defined axially therein;
a movable blade unit mounted to the rotating shaft and including a second blade and an inner ring which is located between the second blade and the rotating shaft, and
a movable ring connected to the movable blade unit and having a flange, an outer collar and the inner ring, the flange connected to the outer collar which is rotatably connected to the inner ring, the inner ring mounted to the rotating shaft and a gap defined between the inner ring and the rotating shaft, multiple sets of rotating members connected to an inner periphery of the inner ring and being in contact with the grooves in the rotating shaft.

### Claim 2 (depends on 1)

The movable blade unit as claimed in claim 1, wherein four sets of rotating members are connected to the inner periphery of the inner ring and each set includes two rotatable pieces, the rotating shaft includes four grooves.

### Claim 3 (depends on 2)

The movable blade unit as claimed in claim 2, wherein the inner periphery of the inner ring includes four flat surfaces which are located at equal intervals, each flat surface includes a post extending therefrom which is perpendicular to the flat surface, nylatron bushes are mounted to the posts and the rotating members are mounted to the nylatron bushes.

### Claim 4 (depends on 1)

The movable blade unit as claimed in claim 1, wherein each of the rotating members is a bearing.

### Claim 5 (depends on 1)

The movable blade unit as claimed in claim 1, wherein each of the grooves is a substantially U-shaped groove and includes two sidewalls with which the rotation member is in contact.

### Claim 6 (depends on 1)

The movable blade unit as claimed in claim 1, wherein the inner ring is connected to a second positioning collar of the movable blade unit.

### Claim 7 (depends on 1)

The movable blade unit as claimed in claim 1, wherein a bearing is located between the outer collar and the inner ring.

### Claim 8 (depends on 1)

The movable blade unit as claimed in claim 1, wherein the flange is connected to a lever.

### Claim 9 (depends on 1)

The movable blade unit as claimed in claim 1, wherein multiple fan blades are connected to outside of the inner ring.