Flow control valve

Details Flow control valve Flow control valve

1982-02-05

1984-04-17

Schwadron, Martin P.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

G05D 1102

Patent

active

044428570

ABSTRACT:
A flow-control valve exhibits a flow-drooping characteristic such that the liquid supply into an oil pressure mechanism is decreased in response to an increase of the amount of liquid discharge from a pump. The pump outlet passage forms branches into a fluid supply passage communicating with an oil pressure mechanism and a recirculating passage back to an oil tank. A control valve located in the recirculating passage is opened in response to the fluid increase from the pump to recirculate a part of the fluid into the tank. An orifice not receiving large influences of the pressure variation is disposed either at the pump outlet passage or the recirculating passage and a variable orifice valve is disposed in the fluid supply passage. The variable orifice is controlled by the pressure differential existing between the upstream and downstream portions of the orifice at either location. When the pressure differential is large, the area of the variable orifice becomes small to thereby obtain the fluid drooping characteristic.

REFERENCES:
patent: 3426785 (1969-02-01), Brady et al.
patent: 3741242 (1973-06-01), Hansen et al.
patent: 4230147 (1980-10-01), Booth et al.

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