Multiple pump load sensing system

Details Multiple pump load sensing system Multiple pump load sensing system

1979-10-17

1983-05-17

Michalsky, Gerald A.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of...

60452, 60486, F15B 1309

Patent

active

043834124

ABSTRACT:
A load responsive system employing a fixed displacement pump and a variable displacement pump in a parallel circuit as a source of fluid in an open-center load sensing system. The load response control valve includes an unloading spool which is flow responsive in the operative positions of the control valve and maintains a constant .DELTA..rho. across the control valve by dumping the pump flow to reservoir; the control valve .DELTA..rho. being greater than the .DELTA..rho. of the pump compensator means so that the variable displacement pump will remain destroked until the system utilizes the full flow of the fixed displacement pump at which time the variable displacement pump strokes-out upon demand.

REFERENCES:
patent: 3386344 (1968-06-01), Junck et al.
patent: 3486334 (1969-12-01), Miller
patent: 3815477 (1974-06-01), Ailshif et al.
patent: 3972187 (1976-08-01), Ital et al.
patent: 3985472 (1976-10-01), Virtue et al.
patent: 4037410 (1977-07-01), Jackson et al.
patent: 4141280 (1979-02-01), Lorimor
patent: 4231396 (1980-11-01), Budzich

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