Valve actuator with hydraulic damper

Details Valve actuator with hydraulic damper Valve actuator with hydraulic damper

1989-10-20

1990-11-20

Rosenthal, Arnold

Valves and valve actuation

Fluid actuated or retarded

Fluid link or column actuator

251 58, 251 61, F16K 31165

Patent

active

049712888

ABSTRACT:
A valve actuator for an associated valve which includes apparatus for opening and closing an associated valve and a first housing in which a first diaphragm is disposed to define first and second chambers on respective sides of the first diaphragm. The apparatus also includes a valve actuator having a housing in which is disposed a second diaphragm to define a third chamber. The valve actuator includes apparatus connecting the second diaphragm to the apparatus for opening and closing the valve; and fluid coupling apparatus connecting the second chamber and the third chamber. The apparatus for opening and closing the valve includes a crank arm carried on a shaft.

REFERENCES:
patent: 2320886 (1943-06-01), Quiroz
patent: 3020969 (1962-02-01), Von Berg et al.

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