Dual-pressure jack
US4748899A · kind A · utility
3Cited by
12References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1986 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Dec 15, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/76
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The casing of the jack is divided into two cylinders by a cross partition, with a first piston which moves in one of the cylinders and a second piston, forming two parts, linked by a rod which crosses the partition to its first part which moves in the first cylinder-shaped piston and its second part which moves in the second cylinder of the jack. The fluid is conveyed selectively either to the cylinder formed by the first piston or to the second cylinder which communicates with the first cylinder through holes drilled in the partition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.