Electrically controlled pressure relief valve including a hydraulic bias
US4548233A · kind A · utility
95Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1984 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Apr 16, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7905
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention relates to pressure relief valves which spring bias is controlled by a proportional magnet. The force applied by the proportional magnet is increased by an additional hydraulic pressure force which acts on the spring. There is the advantage of decreasing the size of the proportional magnet and/or increasing the flow capacity of the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.