Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent
1974-05-09
1976-01-13
Weakley, Harold W.
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
251175, 251196, 251329, F16K 31143
Patent
active
039319539
ABSTRACT:
The valve is comprised of a substantially oblong chamber having one end thereof extending transversely into a conduit having a semi-circular slot formed therein. The portion of the chamber extending into the conduit is provided with a through passage in alignment with the conduit and a valve disc is movably mounted in the chamber for transverse movement relative to the conduit between an operative position in alignment with the conduit and an inoperative position outside of said conduit. An inflatable tube is secured in a peripheral groove in the circumference of the disc and is disposed in fluid communication with the interior of a hollow valve stem secured to the disc and extending outwardly of the chamber. A piston is connected to the valve stem for reciprocating movement in a double acting fluid cylinder and the extreme end of the valve stem extends into a chamber connectable to a source of air under pressure by a suitable valve to control the inflation of the inflatable tube. Limits switches are provided in the double acting cylinder to control valves which control the flow of air under pressure to the double acting cylinder and the chamber for inflating the tube. The inflation of the tube in the operative and inoperative positions will provide a positive sealing engagement in both positions and a deflation of the tube will allow the movement of the valve between the two positions.
REFERENCES:
patent: 539568 (1895-05-01), Bride
patent: 1957807 (1934-05-01), Robinson
patent: 2582877 (1952-01-01), Mekler
patent: 2705610 (1955-04-01), Hjulian
patent: 2873761 (1959-02-01), Tailleferre
patent: 2953345 (1960-09-01), Slemmons
Communications Satellite Corporation (Comsat)
Weakley Harold W.
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