# US 2013/0152432 A1 · Bucket tooth for construction vehicle

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- Number: US 2013/0152432 A1
- Document ID: US20130152432A1
- Status: Published application
- Kind: A1
- Application number: 13/818,785
- Filed: 2012-05-07
- Published: 2013-06-20
- Earliest claimed: 2011-05-09
- Assignees: Komatsu Ltd.
- Inventors: Daijirou Itou; Takanori Nagata; Eiji Amada; Tsuyoshi Yoshida
- Web page: https://patentgrep.com/patent/US20130152432A1

## CPC

- E02F 9/2816: {Mountings therefor}
- E02F 9/2833: {Retaining means, e.g. pins}
- E02F 9/2841: {resilient}
- E02F 9/2891: {Tools for assembling or disassembling}
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)

## Abstract

A bucket tooth for a construction vehicle includes a through-hole formed in a side wall part and passing through to a cavity. The through-hole has on a cavity side a rotating body hole having a shape of a truncated and rotated cone that remains after removing a large diameter side portion obtained by cutting diagonally to a rotational axis of the truncated and rotated cone with a large diameter side of the truncated and rotated cone being disposed on the cavity side, and with the rotational axis of the truncated and rotated cone being inclined outwardly toward the distal end portion of the bucket tooth from the cavity along a width direction of the bucket tooth.

## Claims

### Claim 1

A bucket tooth for a construction vehicle, which is mounted to a distal end part of a bucket, the bucket tooth comprising:
an upper face;
a lower face linked to the upper face at a distal end portion;
a pair of side faces formed on sides including the distal end portion so as to link the upper face and the lower face;
a rear end opening formed on a rear side of the upper face, the lower face, and the pair of side faces, and into which is inserted the distal end part of the bucket;
a convex side wall part provided on the rear side of one of the side faces;
a cavity provided extend in inside the bucket tooth from the rear end opening; and
a through-hole is formed in the side wall part and passing through to the cavity, and the through-hole having on a cavity side a rotating body hole having a shape of a truncated and rotated cone that remains after removing a large diameter side portion obtained by cutting diagonally to a rotational axis of the truncated and rotated cone with a large diameter side of the truncated and rotated cone being disposed on the cavity side, and with the rotational axis of the truncated and rotated cone being inclined outwardly toward the distal end portion of the bucket tooth from the cavity along a width direction of the bucket tooth.

### Claim 2 (depends on 1)

The bucket tooth for a construction vehicle according to claim 1, wherein
the through-hole further has a concave opening linked to the rotating body hole and is disposed on a side of the side wall part, and
the concave opening has a flat opening bottom face that is inclined toward a front portion of the bucket tooth and perpendicular to the rotational axis of the truncated and rotated cone from a surface of the side wall part of the bucket tooth.

### Claim 3 (depends on 1)

The bucket tooth for a construction vehicle according to claim 1, wherein
the rotating body hole is arranged such that an edge portion of the truncated and rotated cone in a cross section cut along a plane that includes the rotational axis of the truncated and rotated cone is a straight line.