Operating and bracing jack having an internal locking mechanism
US4323001A · kind A · utility
4Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1978 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Aug 21, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B15/261
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bracing jack comprising a cylinder and a jack bar slidable in the cylinder from a bar extended position to a bar retracted position, the jack having an internal locking mechanism including a hydraulic and a mechanical actuator for unlocking under load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.