High pressure, 4-position, 5-way, pilot operated valve for corrosive media
US3958598A · kind A · utility
1Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1975 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Mar 25, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87225
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pilot hydrauic fluid pressure operated valve having the function of a 4sition 5-way valve for controlling the flow of high pressure corrosive media in a high pressure environment such as the deep ocean. The valve body contains two double-ended axially aligned poppet pistons each of which comprise a large pilot actuated piston in the center of the "spool" and each of which have a valve poppet at each end of the "spool" for control of the media which may be sea water ballast of a deep submergence vehicle for example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.