Hydraulically operated shutoff valve
US4141533A · kind A · utility
7Cited by
11References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1976 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Dec 9, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/163
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fast closing shutoff valve having a self-contained hydraulic actuating system and an emergency pneumatic back-up system. The hydraulic system includes an accumulator for a high closing rate with a minimum size pump. The actuating system operates through a toggle linkage to reduce valve rate as valve nears closed position to reduce impact loads and increase closing pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.