Signal bleed-down valve

Details Signal bleed-down valve Signal bleed-down valve

1980-02-04

1982-08-17

Cohen, Irwin C.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

417218, F04B 4908, F15B 1304

Patent

active

043442854

ABSTRACT:
A signal bleed-down valve in a load responsive system which is positioned in the sensing line between the pump compensator and control valve. The valve in the absence of sufficient pilot pressure opens the pump compensator to drain. Otherwise, the valve is controlled by pilot flow across a fixed orifice in the spool which creates a pressure drop acting against a spring, and moves the valve spool to a position metering the pilot flow so as to maintain a constant flow level across the valve spool regardless of the pressure level.

REFERENCES:
patent: 2238060 (1941-04-01), Kendrick
patent: 3186353 (1965-06-01), Taplin
patent: 3401521 (1968-09-01), Plate
patent: 3406850 (1968-10-01), Hancox
patent: 3742982 (1973-07-01), Miller
patent: 3989062 (1976-11-01), Tennis
patent: 4037410 (1977-07-01), Jackson et al.
patent: 4037621 (1977-07-01), Budzich
patent: 4087968 (1978-05-01), Biancheita

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