Control system having override for fluid operated work elements

Details Control system having override for fluid operated work elements Control system having override for fluid operated work elements

1976-12-22

1977-10-25

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of...

60445, 60486, F15B 1306, F15B 1309

Patent

active

040550460

ABSTRACT:
A control system has override for fluid operated work elements served by at least two variable displacement pumps each serving a separate circuit. At least two work elements are served by the first circuit and at least one work element is served by the second circuit. The discharge rate of the first pump is controlled by a signal delivered from a summing valve in response to the pressures of the first and second circuits during operation of a preselected one of the work elements of the first circuit and controlled by a modified pilot pressure signal in response to operation of only the other work element of the first circuit.

REFERENCES:
patent: 3841795 (1974-10-01), Ferre et al.
patent: 3963378 (1976-06-01), McMillan

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