Dual pilot counterbalance valve

Details Dual pilot counterbalance valve Dual pilot counterbalance valve

1980-06-30

1982-07-13

Cohan, Alan

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

60460, 1374925, 137599, F15B 1300

Patent

active

043388566

ABSTRACT:
A counterbalance valve for controlling the flow of fluid from a hydraulic motor when a load is lowered has a pilot operated valve which modulates the flow of pressure fluid to and from a control port connected to main valve poppet to thereby set the opening of the poppet.

REFERENCES:
patent: 3124343 (1964-03-01), Williamson
patent: 3294111 (1966-12-01), Abercrombie
patent: 3478777 (1969-11-01), Brent
patent: 3896844 (1975-07-01), Schumacher
patent: 4172466 (1979-10-01), Pattarini

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