Hydraulic wrench
US5301574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1993 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Mar 2, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/0078
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hydraulic wrench is provided of minimum external dimensions and yet constructed in a manner to be capable of exerting relatively high torsional forces. The wrench is constructed to be driven by a hydraulically reciprocal piston carrying a rack gear thereon with the rack gear meshed with a reciprocal sector gear having a pawl pivotally supported therefrom for driving a ratchet-type power wheel of the wrench. The wrench is provided with a variably positionable and reversable reaction bar or abutment assembly on the end thereof remote from the power wheel and the wrench further includes a secondary deactivatable ratchet pawl for preventing reverse rotation of the main ratchet-type drive wheel of the wrench.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.