Sub-sea pilot-operated valve
US4601311A · kind A · utility
9Cited by
11References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1984 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | Dec 28, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8667
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pilot-operated, directional control valve having a ported slide and cooperating, non-interflow, shear-type seals. The valve achieves a high flow capacity for a given size by utilizing both of a pair of opposed sleeve seals to conduct flow through the valve. The valve response is improved by a hydraulic bias of supply pressure on the slide which requires operation at a high pilot pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.