# US 2021/0260730 A1 · Engagement structure for tool

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

- Number: US 2021/0260730 A1
- Document ID: US20210260730A1
- Status: Published application
- Kind: A1
- Application number: 16/798,460
- Filed: 2020-02-24
- Published: 2021-08-26
- Earliest claimed: 2020-02-24
- Inventors: Ben Wen LIU
- Web page: https://patentgrep.com/patent/US20210260730A1

## CPC

- B25B 13/463: {a pawl engaging an externally toothed wheel}
- B25B 13/481: {for operating in areas having limited access}
- B25B 13/04: of ring jaw type
- B25B 13/08: of open jaw type
- B25B 13/461: {with concentric driving and driven member}
- B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING

## Abstract

An engagement structure for a tool contains: a drive member which includes an accommodation orifice, a hexagonal tooth portion, and six planes. A respective one of the six planes is arranged on a center of a respective one of six peripheral sides of the hexagonal tooth portion, and the two beveled rims extends from the two sides of the respective one plane and are connected with a first adjacent beveled rim of a first adjacent plane and a second adjacent beveled rim of a second adjacent plane. A ratio of lengths of the respective one plane, the first adjacent beveled rim and the second adjacent beveled rim is 2:1:2, and an angle between the respective one plane and each of the first adjacent beveled rims and the second adjacent beveled rim is 2 degrees.

## Claims

### Claim 1

An engagement structure for a tool comprising:
a drive member which includes an accommodation orifice defined in the drive member, a hexagonal tooth portion formed around an inner wall of the accommodation orifice, and six planes;
wherein a respective one of the six planes is arranged on a center of a respective one of six peripheral sides of the hexagonal tooth portion, and the two beveled rims extends from the two sides of the respective one plane and are connected with a first adjacent beveled rim of a first adjacent plane and a second adjacent beveled rim of a second adjacent plane, wherein a ratio of lengths of the respective one plane, the first adjacent beveled rim and the second adjacent beveled rim is 2:1:2, and an angle between the respective one plane and each of the first adjacent beveled rims and the second adjacent beveled rim is 2 degrees;
wherein the drive portion is rotated to drive a workpiece without any notches/unfilled corner or a workpiece having notches/unfilled corner;
wherein when rotating the drive portion in a clockwise direction or a counterclockwise direction, each of the two beveled rims of the respective one plane matingly engages and does not damage the workpiece.

### Claim 2 (depends on 1)

The engagement structure for the tool as claimed in claim 1, wherein the multiple bevel rims of the hexagonal tooth portion engage with and rotate a peripheral side of the hexagonal object or the non-hexagonal object.

### Claim 3 (depends on 1)

The engagement structure for the tool as claimed in claim 1, wherein when the drive portion is idly rotated, an angle between each beveled rim of the respective one plane and each of six sides of the workpiece is 4 degrees.

### Claim 4 (depends on 1)

The engagement structure for the tool as claimed in claim 1, wherein the tool is any one of a ratchet wrench, a socket, and an open end wrench.