Fluid pressure control devices

Details Fluid pressure control devices Fluid pressure control devices

1974-12-23

1976-03-30

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60450, 417212, F16H 3946

Patent

active

039465616

ABSTRACT:
A control device for connection between a hydropump and a hydromotor of a hydraulic system, to provide a control pressure for regulating operation of the system, has a valve housing accommodating a displaceable valve member formed to provide a throttling passageway between an inlet and a main outlet of the housing. Fluid flow through the throttle tends to move the valve member to open a connection between the inlet and a control pressure outlet of the housing, against the action of a resilient biasing arrangement and a force produced on the member in dependence upon the control pressure itself. The action of the biasing arrangement, however, is variable, enabling the device to be designed in accordance with a desired fluid-pressure/flow rate relationship.

REFERENCES:
patent: 3296797 (1967-01-01), Tlusty
patent: 3444689 (1969-05-01), Budzich

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