Socket wrench extension with extensible magnet
US4898053A · kind A · utility
Inventor
Key dates
| Filing date | Oct 1, 1987 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Oct 1, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A socket wrench extension is used with one of a plurality of removable sockets having different depths. The extension has a threaded magnetic head and a shank. The shank has a driving and driven end. A threaded axial bore extends into the driving end but falls short of the driven end. The driven end has a drive receiving portion. The shank also has at its driving end a polygonal portion with a polygonal cross-section. The magnetic head is threaded partially into the bore to extend beyond the driving end. Thus the threaded magnetic head can be adjustably extended from the driving end to bring the magnetic head into a position consistent with the different depths of the removable sockets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.