Valves and valve actuation – Fluid actuated or retarded – Dashpot or fluid controlled retarder or timer
Patent
1977-11-02
1979-08-28
Rosenthal, Arnold
Valves and valve actuation
Fluid actuated or retarded
Dashpot or fluid controlled retarder or timer
188298, 188316, F16K 3148, F16F 920
Patent
active
041658574
ABSTRACT:
An improved liquid-filled dashpot mechanism for use with a spring-biased, axially-displaceable valve stem, comprising: a housing having a passageway therein, a stem in the passageway adapted for reciprocation therein, a pair of annular rolling diaphragms disposed in spaced-apart, face-to-face relationship within the passageway in the housing, each diaphragm being respectively secured in fluid sealing relationship to the housing and the stem to collectively form an enclosed container for the dashpot liquid, a piston fixedly mounted on the stem intermediate the rolling diaphragms adapted for operative displacement within the housing and dividing the container into two chambers, a liquid metering passageway in the piston for providing fluid communication between the two chambers, and a check valve secured to the piston to permit the unidirectional flow of liquid therethrough, and when the dashpot liquid is not permitted to flow through the check valve, to direct the flow of dashpot fluid through the liquid metering passageway, thereby effecting dashpot action.
REFERENCES:
patent: 1857363 (1932-05-01), Deneklau
patent: 2507268 (1950-05-01), Patriquin
patent: 2579334 (1951-12-01), Plank
patent: 2781519 (1957-02-01), Marchant
patent: 3266603 (1966-08-01), Kamimoto
patent: 3441053 (1969-04-01), Robinson
patent: 3484090 (1969-12-01), Mahoney
patent: 3933337 (1976-01-01), Morris et al.
Fields Larry D.
Morris Earl L.
Acorn Engineering Co.
Lofstedt Ben E.
Rosenthal Arnold
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