Valve actuator having a continuously charged accumulator
US4349175A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1980 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Dec 10, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/1225
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An actuator is provided which is respondable to control fluid pressure for moving an operative means of a valve between open and closed positions. Valve means are movable between open and closed positions and communicate between the accumulator means and the fluid passage means to permit fluid control pressure charging of the accumulator chamber when the valve is in the open position and for preventing discharge of fluid pressure within the accumulator chamber when the valve is in the closed position. The valve is responsive to pressure differential between the accumulator chamber and the fluid passage means. The shaft is selectively shiftable longitudinally in a first direction to move the operative means to one of open and closed positions, preferably by increase in fluid control pressure, the shaft being selectively shiftable longitudinally in a second direction to move the operative means to the other of the open and closed positions upon, preferably, subsequent decrease in fluid control pressure and release of energy stored within the accumulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.