Pilot control valve for load sensing hydraulic system

Details Pilot control valve for load sensing hydraulic system Pilot control valve for load sensing hydraulic system

1981-10-05

1983-12-06

Michalsky, Gerald A.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

91516, 91518, 13762516, F15B 1306

Patent

active

044187106

ABSTRACT:
A pilot control valve (35) is provided for use in a load sensing system including a priority flow control valve (21). The pilot valve includes a flow orifice (47) through which passes flow from the priority outlet port (23) to the motor (13). The pilot valve includes a valve sleeve (73) and a relatively rotatable valve spool (75). This valving controls fluid communication between the load signal port (49) and the system reservoir and main flow path, upstream and downstream of the flow orifice. Movement of the valve spool from a minimum flow position to a maximum flow position progressively varies the load signal (51) from reservoir pressure to system pressure, thus causing the output of the priority valve (21) to progressively increase from a minimum flow to a maximum flow.

REFERENCES:
patent: 3455210 (1969-07-01), Allen
patent: 3971216 (1976-07-01), Miller
patent: 4167893 (1979-09-01), Johnson
patent: 4199942 (1980-04-01), Kasper

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