Compact manifolded fail safe hydraulic control system
US7677266B2 · kind B2 · utility
2Cited by
11References
22Claims
0Family size
Inventor
Key dates
| Filing date | Nov 17, 2006 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Apr 9, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7826
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A manifolded fail-safe hydraulic control system provides fail-safe operation of a pipeline valve using no more than a total of 45 proprietary parts in the system. The system controls the operation of a spring return actuator, which in turn strokes the pipeline valve from the normal operating position to the fail-safe position, or from the fail-safe position to the normal operating position. The system enables the valve to automatically stroke to its fail-safe position without external power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.