Rotary actuator for valve

Details Rotary actuator for valve Rotary actuator for valve

1980-07-14

1982-07-13

Walton, George L.

Expansible chamber devices

Relatively movable working members

First working member moves second coaxial working member...

74 25, 92 68, 92129, 251 58, 251 62, 251229, 251251, F01B 700, F16K 31122

Patent

active

043388574

ABSTRACT:
This valve actuator is primarily intended for use with rotary cut-off valves. It includes a housing which is attached to the valve body for receiving the valve stem and a longitudinal passage slidably mounting opposed piston elements. The piston elements include spaced shoulders which engage the remote end of a radial arm mounted within the housing and attached to the stem for rotating said stem. The radial arm includes a cam at the remote end having opposed cam faces alternately engaged by the piston elements and configurated to provide a minimum gap between the cam and the piston shoulders during the rotation of the valve between open and closed positions.

REFERENCES:
patent: 1119758 (1914-12-01), Kings
patent: 1229443 (1917-06-01), Hall et al.
patent: 1517728 (1924-12-01), Heath
patent: 2190228 (1940-02-01), Bowen
patent: 3261266 (1966-07-01), Ledeen et al.
patent: 3709106 (1973-01-01), Shafer
patent: 3824901 (1974-07-01), Shafer
patent: 3958493 (1976-05-01), Fujita et al.
patent: 4094231 (1978-06-01), Carr

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