Open end ratchet wrench
US5669272A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1996 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Feb 22, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/46
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A ratchet wrench comprises a body disposed on a handle, the body having a head provided with a main wall defining an opening for receiving an element to be rotated. A pair of supplementary walls extends radially outwardly from the main wall, each of the supplementary walls being formed with a plurality of variously-shaped segments defining a recess. A pair of element engaging jaw members are retained in each of the recesses, each of the jaw members having a multiplicity of variously-shaped surfaces slidable and pivotable along the segments of each of the recesses. A pair of springs cooperates with the jaw members, each of the springs being mounted separately in each of the recesses for biasing each of the jaw members into the opening. Rotation of the wrench in one direction maintains a bias of the spring such that when the element to be rotated is engaged against each of the jaw members, the element is driving the rotating. Rotation of the wrench in an opposite direction acts against the bias of the spring to move each of the jaw members such that the element to be rotated slips against each of the jaw members to permit the element to ratchet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.