Structure of wrench
US5605081A · kind A · utility
1Cited by
6References
2Claims
0Family size
Inventors
Key dates
| Filing date | Dec 5, 1995 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Dec 5, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S81/05
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wrench including an operation arm having an operation head at one end for turning a workpiece, a calibration handle connected to one end of the operation arm and turned relative to the operation arm to set the desired index number of torsion, and a lock controlled to lock the calibration handle when the desired index number is set, wherein a transparent socket is mounted around the calibration handle adjacent to the operation arm, having a lens, which magnifies the index number of torsion for accurate calibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.