Pressure relay adapted to signal the position of the movable member of a jack
US4492149A · kind A · utility
1Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1983 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Aug 19, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8663
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a pressure relay comprising inside its body, and besides a distributor device with a pressure inlet, an outlet and an exhaust, an auxiliary conduit of large cross-section which is connected with a control input of the said distributor device and comprises means to mount the said body on the jack, and to receive a pipe fitting supplying pressure to a jack. The invention finds an application for signalling the outermost positions of a jack piston, or in combination with branch-pipe type jacks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.