Load sensing valve

Details Load sensing valve Load sensing valve

1978-02-06

1979-09-18

Geoghegan, Edgar W.

Motors: expansible chamber type

With motive fluid valve

Relatively movable serial valves

91467, 137596, 60494, F15B 1304

Patent

active

041678931

ABSTRACT:
A fluid controller is disclosed of the type including a primary valve member, and a follow-up valve member. The controller includes a load signal port and a load signal chamber. Fluid is communicated from the inlet port to the load signal chamber, and the valve members define a neutral orifice communicating between the load signal chamber and the return port when the valving is in neutral. The valving defines operating orifices communicating fluid from the load signal chamber to the main fluid path, downstream of the main flow control orifice, when the valving is shifted away from neutral. The operating orifices have a smaller orifice area when the valving approaches maximum deflection. The result is a substantially higher differential operating pressure, and a higher flow rate than would otherwise be possible at that particular valve deflection.

REFERENCES:
patent: RE25126 (1962-02-01), Charlson
patent: 3455210 (1969-07-01), Allen
patent: 3815477 (1974-06-01), Ailshie et al.
patent: 3971216 (1976-07-01), Miller
patent: 4043419 (1977-08-01), Larson et al.

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