Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent
1986-07-07
1987-03-24
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
74531, 92 23, 92130A, 251297, F16K 31122
Patent
active
046519700
ABSTRACT:
A fluid-powered actuator assembly 10 for gate valves 13 having a slab gate 21 with a port 22 adapted to be placed in registry with the flow passage through the valve wherein the valve is moved to open position by application of fluid pressure to the actuator piston 18 and moved to closed position by a piston return spring 33 when the pressure is removed. The assembly includes an auxiliary energy storage device 40 in the form of a coiled spring 41 which is compressed in the initial stages of the actuator stroke to open the valve 13 and is maintained in the compressed energized state by a releasable latch mechanism 52 which latches to the auxiliary spring housing 42. When the actuator 12 operates to close the valve, the auxiliary coiled spring 41 is released near the end of the valve-closing stroke to provide additional axial thrust to the actuator shaft 17 and the valve gate 21 of a magnitude sufficient to shear wire lines 25 or other members which have been inserted through the gate port. The auxiliary energy storage device 40 may be packaged as a cartridge and universally mounted on various sizes and models of piston-type actuators.
REFERENCES:
patent: 2733729 (1956-02-01), Wolfe
patent: 4073466 (1978-02-01), Snyder
patent: 4182369 (1980-01-01), Akkerman
patent: 4309022 (1982-01-01), Reinicke et al.
patent: 4372333 (1983-02-01), Goans
patent: 4480531 (1984-11-01), Mylius
patent: 4526194 (1985-07-01), Miller
patent: 4601457 (1986-07-01), Austin et al.
Joy Manufacturing Company
Marnock Marvin J.
Walton George L.
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