Variable displacement pump with hydraulic adjustment for control

Details Variable displacement pump with hydraulic adjustment for control Variable displacement pump with hydraulic adjustment for control

1989-12-29

1993-02-23

Look, Edward K.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60444, 91454, 91457, 91443, 91448, 91461, 91405, 91406, F16D 3102

Patent

active

051879336

ABSTRACT:
The invention relates to a variable displacement pump supplying fluid to a number of consumers. The pump control for adjusting the delivery rate is actuated by a signal which is produced by the respective highest loaded consumer. The signal is provided by a valve, in particular a pressure compensating valve which is associated with the consumer, and which valve opens a spool land when the valve becomes positioned at its control end range. A pressure signal from any pressure fluid source is delivered through the land to the pump controller. The control, according to the invention, offers a broad variety of possibilities for arranging the pressure compensation valve at various locations, engaging the valve by a variety of pressure differences, and using a number of pressure fluid sources of provide for the signal pressure to actuate the pump controller.

REFERENCES:
patent: 3935707 (1976-02-01), Murphy et al.
patent: 4201052 (1980-05-01), Breesen et al.
patent: 4353289 (1982-10-01), Lonnemo
patent: 4401009 (1983-08-01), Zeuner et al.
patent: 4407122 (1983-10-01), Nanda
patent: 4475442 (1984-01-01), Breeden
patent: 4571941 (1986-02-01), Aoyagi et al.

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