Power wrench
US4838130A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1987 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Jul 1, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B21/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wrench is presented which includes a power cylinder having a piston rod extending therethrough. An anchor or reaction assembly comprising an anchoring ring and attached anchor rod is adjustably attached to the piston rod to permit connection of the anchoring ring to a nut spaced from the nut to be turned. A wrench assembly comprising a preferably arcuate lever arm with a ratchet assembly is pivotably connected to the power cylinder. The wrench incorporates a ratchet pawl which engages a drive mechanism. A control lever can disengage the pawl from the drive mechanism, and a latch mechanism retains the control lever and pawl in a disengaged position until released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.