Friction drive wrench
US3969962A · kind A · utility
3Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 1975 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | May 27, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/462
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wrench includes an elongated shank, an axial cavity in one end of the shank, a radially split annular driving member formed with radial tangs fitting into the axial cavity in the shank, a cylindrical head mounted within the driving member and frictionally gripped thereby, and manually actuable means whereby the grip is increased during forward movement of the shank in a selected direction and released during back-up movement of the shank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.