Apparatus for supplying hydraulic fluid

Details Apparatus for supplying hydraulic fluid Apparatus for supplying hydraulic fluid

1982-02-16

1984-05-01

Gluck, Richard E.

Pumps

With condition responsive pumped fluid control

Plural pump units with individual or relative control

417299, F04B 4908

Patent

active

044458185

ABSTRACT:
A flow path switching valve is provided, operating to merge hydraulic fluid from a plurality of pumps in accordance with a magnitude of a loading applied to a hydraulic unit, and a variable orifice is defined adjacent to the valve. A flow control valve is also provided for returning part of the hydraulic fluid to a tank, and operates in accordance with the throttle opening of the variable orifice which changes in accordance with the operation of the flow path switching valve.

REFERENCES:
patent: 3314495 (1967-07-01), Clark et al.
patent: 3985472 (1976-10-01), Virtue et al.
patent: 4412789 (1983-11-01), Ohe et al.

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