Safety jack
US6902148B1 · kind B1 · utility
11Cited by
10References
18Claims
0Family size
Inventor
Key dates
| Filing date | Nov 19, 2003 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Nov 19, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F3/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention is a safety jack having a propping mechanism comprised of a prop attached parallel to and jointly movable with the lifting arm, a storage well for receiving the prop in a retracted position, and a pin engagable with the prop to bias the prop and the body of the jack to prevent untimely lifting arm retraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.