Control apparatus for an adjustable hydraulic machine driven by

Details Control apparatus for an adjustable hydraulic machine driven by Control apparatus for an adjustable hydraulic machine driven by

1974-12-11

1976-01-20

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Condition responsive control of or by input to input pump...

60447, 60449, F16D 3100, F16H 3946

Patent

active

039329933

ABSTRACT:
Apparatus for adjusting a hydraulic machine driven by an adjustable driving motor comprises an adjustment motor which adjusts the machine in one sense under one fluid control input dependent upon actual driving motor speed and in an opposite sense under an opposing such input supplied at a control outlet of a pressure control valve device in dependence upon the position of a valve slide thereof urged by the first input against a biasing force selectively adjustable in dependence upon desired driving motor speed. When the actual speed falls sufficiently relative to the desired speed, the slide travels from one position, blocking flow from a fluid inlet of the valve device to its control outlet, to another position allowing such flow and also allowing the second input thus produced to act on the slide, in the same direction as the first does, until the slide returns to its initial position.

REFERENCES:
patent: 3167907 (1965-02-01), Kempson
patent: 3214911 (1965-11-01), Kempson
patent: 3284999 (1966-11-01), Lease

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