Wrench
US4003275A · kind A · utility
9Cited by
2References
1Claims
0Family size
Inventor
Key dates
| Filing date | Feb 25, 1976 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Feb 25, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B17/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wrench having an elongated handle and a socket drive member rotatably mounted in one end of the handle. A shaft extends through the handle to a knob at the end thereof opposite the drive and is connected to the drive member by a gear connection between the shaft and the drive member. The gearing includes a worm so as to prevent the rotation of the drive member with respect to the wrench except when the shaft is turned. The wrench is useful in positions wherein it is difficult to start a bolt with the fingers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.