Method and apparatus for enhancing stability in hydraulic flow c

Details Method and apparatus for enhancing stability in hydraulic flow c Method and apparatus for enhancing stability in hydraulic flow c

1993-06-30

1995-01-31

Nilson, Robert G.

Valves and valve actuation

Lost motion between actuator and valve

137117, G05D 701

Patent

active

053853296

ABSTRACT:
A flow control valve having a piston and valve element connected together by a portion of a spring also connected to a pressure relief mechanism. Also disclosed is an alternative embodiment featuring a passage delivering metered flow from an input passage to a low pressure end of a piston and then through a pressure sensing means from the low pressure chamber to an output passage. A valving sub-assembly is movable to substantially suppress the flow rate ripple by bypassing a dominant portion of the flow rate ripple.

REFERENCES:
patent: 4388941 (1983-06-01), Riedhammer
patent: 4463929 (1984-08-01), Dantlgraber
patent: 4495962 (1985-01-01), Hattori

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