Reverse differential holding valve

Details Reverse differential holding valve Reverse differential holding valve

1977-04-21

1979-10-30

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

91420, 251 635, 251282, F16K 31122

Patent

active

041725824

ABSTRACT:
A pilot operated hydraulic holding valve includes a poppet valve member which is biased to close by the pressure generated by the load being held in direct proportion to the magnitude of that pressure, thereby eliminating the need for mechanical biasing means and reducing the pilot pressure required to open the valve at low load pressures.

REFERENCES:
patent: 1720705 (1929-07-01), Waterman
patent: 2897836 (1959-08-01), Peters et al.
patent: 3282552 (1966-11-01), Sommese, Sr.
patent: 3472261 (1969-10-01), Brannon
patent: 4018136 (1977-04-01), Kaetterhenry

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