Open end ratchet wrench
US4327610A · kind A · utility
5Cited by
4References
8Claims
0Family size
Inventor
Key dates
| Filing date | Jun 2, 1980 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Jun 2, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/46
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An open end ratchet wrench has a head portion which includes a slot into which a plurality of cantilever spring segments project. The ends of the cantilever spring segments engage and turn the flat surfaces of a nut when the wrench is turned in a tightening direction. When the wrench is turned in the opposite direction, the cantilever springs flex to override the corners of the nut and then spring back to engage adjacent flat surfaces of the nut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.