Pressure medium actuated valve

Details Pressure medium actuated valve Pressure medium actuated valve

1984-05-17

1985-11-12

Scott, Samuel

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 25, 251 31, 91415, 91416, F16K 31124

Patent

active

045523304

ABSTRACT:
The pressure medium actuated valve has a pressure medium inlet port, an outlet port and a cylinder in which a piston connected to a closure member can slide. The piston sub-divides the cylinder into a first cylinder space and a second cylinder space. Two relief conduits, each containing a control valve are connected to the cylinder spaces and extend to a pressure medium sink. A first connecting conduit containing a control valve extends from the inlet port to the first cylinder space and a second connecting conduit containing a control valve extends from the inlet port to the second cylinder space. The second connecting conduit has a non-return valve through which pressure medium flows in the direction of the second cylinder space, a third connecting conduit being provided between the first and second connecting conduits.

REFERENCES:
patent: 2587539 (1952-02-01), Seaman
patent: 2780204 (1957-02-01), Barley
patent: 2830784 (1958-04-01), Placette
patent: 2986368 (1961-05-01), Moore
patent: 3491982 (1970-01-01), Gascoigne
patent: 3746299 (1973-07-01), Lewis
patent: 3814375 (1974-06-01), Grotloh
patent: 3892381 (1975-07-01), Prescott et al.

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