Self-compensating proportional hydraulic valve
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United States of America Patent
Stats
-
Dec 19, 2000
Grant Date -
N/A
app pub date -
May 29, 1998
filing date -
Jun 13, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An hydraulic valve has a flow/pressure characteristic matched to that of a pump with which it is used. The valve has a housing with a fluid inlet in its side and an outlet at one end. A shuttle is movable along the housing under control of a proportional solenoid, to vary the amount by which an edge of the shuttle covers the inlet and thereby controls flow of fluid through the valve. The shuttle has a flange one end located between the inlet and outlet so that fluid flowing from the inlet to the outlet applies pressure to one side of the flange and displaces the shuttle to close the inlet. In this way, an increase in pressure tends to reduce the effective size of the inlet aperture to compensate for pressure variation.
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Cited Art Landscape
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