Self-releasing jack assembly
US4136891A · kind A · utility
7Cited by
2References
5Claims
0Family size
Inventor
Key dates
| Filing date | Aug 25, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Aug 25, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60S9/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A self-releasing jack for installation on a trailer tongue that releases upon the application of strong rotational forces applied to the base of the jack when the trailer is inadvertently towed without raising the jack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.