Wrench having a locking device with a smaller driving angle
US7146881B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 2005 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Oct 11, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/463
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wrench includes a drive head, a drive member, a plurality of locking teeth mounted on either one of the inner wall of the drive head and the drive member, and two locking devices located beside the drive member. An urging block is located between the two locking devices for pressing one of the two locking devices to engage with the drive member. Each of the locking devices includes two driving blocks each formed with a locking end engageable with the locking teeth to drive the drive member. The locking ends of the two driving blocks are respectively engaged with the locking teeth at different time. Thus, the locking device has a smaller driving angle for driving the drive member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.