Internal wrench
US5172615A · kind A · utility
17Cited by
6References
14Claims
0Family size
Inventor
Key dates
| Filing date | Mar 19, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Mar 19, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B15/008
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An internal wrench has a body having an internal hole of a polygon shape and an outer surface of a polygon shape which conforms to the internal wrenching surface of the part to be wrenched. The wrench body is provided with a shoulder for locating the wrench in a proper drive engagment position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.