Valves and valve actuation – Fluid actuated or retarded – Flexible wall expansible chamber reciprocating valve actuator
Patent
1974-10-03
1976-07-06
Schwadron, Martin P.
Valves and valve actuation
Fluid actuated or retarded
Flexible wall expansible chamber reciprocating valve actuator
92 92, 138127, 251 612, F16K 31126
Patent
active
039678091
ABSTRACT:
The specification describes a linear fluidic actuator comprising a plurality of expansible tubes or tubular envelopes closed at opposite ends and coupled in a chain and arranged to have one end of the chain anchored while the other end is adapted to move and exert a tensile force upon inflation of one or more of the tubes, as by compressed air, into a circular diameter, in accordance with the degree of contraction of the chain of tubes. A variation of the actuator utilizes the contracting force of the chain of tubes to effect compression of one or more caged springs, the compressive force of which is illustratively shown and described as actuating a floating member to operate a valve device of the gate or plug type. Also disclosed are modifications utilizing a plurality of parallel-related chains of tubes and tubes expansible to different diameters for utilizing different inflating pressures.
REFERENCES:
patent: 798988 (1905-09-01), Wilkins
patent: 1651022 (1927-11-01), Fulton
patent: 2991763 (1961-07-01), Marette
patent: 3284964 (1966-11-01), Saito
patent: 3324895 (1967-06-01), Johnson
patent: 3580289 (1971-05-01), James, Jr. et al.
patent: 3618638 (1971-11-01), Yarlott et al.
patent: 3645173 (1972-02-01), Yarlott
patent: 3725167 (1973-04-01), Love et al.
Schwadron Martin P.
Walton George L.
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