Pilot operated pressure relief valve
US4321941A · kind A · utility
8Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1980 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Dec 3, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86614
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pilot operated pressure relief valve unit has a main valve having a main piston movable between two control spaces interconnected by a passage provided with a nozzle; one of the control spaces is constituted by two separate control chambers delimited by corresponding areas of the main piston whereby one of the chambers is directly connected to the pilot valve and the other control chamber is connected to the pilot valve via a nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.