Self-compensating proportional hydraulic valve

Details Self-compensating proportional hydraulic valve Self-compensating proportional hydraulic valve

1998-05-29

2000-12-19

Shaver, Kevin

Valves and valve actuation

Electrically actuated valve

Balanced valve

25112908, 1374844, 91459, F16K 3102

Patent

active

061618152

ABSTRACT:
An hydraulic valve has a flow/pressure characteristic matched to that of a pump with which it is used. The valve has a housing with a fluid inlet in its side and an outlet at one end. A shuttle is movable along the housing under control of a proportional solenoid, to vary the amount by which an edge of the shuttle covers the inlet and thereby controls flow of fluid through the valve. The shuttle has a flange one end located between the inlet and outlet so that fluid flowing from the inlet to the outlet applies pressure to one side of the flange and displaces the shuttle to close the inlet. In this way, an increase in pressure tends to reduce the effective size of the inlet aperture to compensate for pressure variation.

REFERENCES:
patent: 3949964 (1976-04-01), Freeman
patent: 4062269 (1977-12-01), Chichester et al.
patent: 4313467 (1982-02-01), Lang
patent: 4714234 (1987-12-01), Falk et al.
patent: 5094218 (1992-03-01), Everingham et al.

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