Extension element for use with wrench-type hand tools
US5033337A · kind A · utility
30Cited by
5References
5Claims
0Family size
Inventor
Key dates
| Filing date | Nov 20, 1990 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Nov 20, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/0021
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An extension unit is used in conjunction with wrench-type hand tools, such as socket and ratchet wrenches. One form of the unit includes a handle and an extension arm that has a plurality of spring-loaded balls thereon at distances that are spaced apart from each other along the longitudinal axis of the extension arm by increments that are uniform. A further extension element is attached to the handle and a bayonet coupling is used to properly align the further extension element with respect to the handle. A second form of the unit includes a spring loaded catch and spring loaded anchors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.