Closing assist for valves

Details Closing assist for valves Closing assist for valves

1976-02-09

1977-05-24

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

60547, 60572, 251 44, 251 57, F16K 3112

Patent

active

040248844

ABSTRACT:
A shutoff valve in a line containing fluid under pressure which after being closed is held closed by another fluid under pressure. The other fluid is one such as air which is available at the valve.

REFERENCES:
patent: 1918424 (1933-07-01), Pontow et al.
patent: 2758811 (1956-08-01), Peterson
patent: 2795391 (1957-06-01), Krone et al.
patent: 3182971 (1965-05-01), Wakeman et al.
patent: 3226078 (1965-12-01), Anderson
patent: 3690616 (1972-09-01), Lewis et al.
patent: 3763744 (1973-10-01), Fournell et al.
patent: 3824896 (1974-07-01), Tull

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