Jack safety device
US4635902A · kind A · utility
30Cited by
7References
3Claims
0Family size
Inventor
Key dates
| Filing date | May 13, 1985 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | May 13, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F3/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Jack safety device, having a rotation key integral with a pressing spring, a hollow-set key lid, and a spanner fitting the spanner onto a hydraulic tank incorporating a camming bearing surface on the spanner so as to move the key into grooves on the hydraulic jack stem in one position of the spanner and lift the key out of the grooves in another position of the spanner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.