Control valve with area independent pressure sensing
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United States of America Patent
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Nov 5, 2013
Grant Date -
Oct 24, 2013
app pub date -
Apr 18, 2012
filing date -
Apr 18, 2012
priority date (Note) -
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Abstract
A control valve includes a valve body with a longitudinal bore into which a first port, a second port, and a workport communicate. A valve element is slideably received within the longitudinal bore and has a valve element bore extending inwardly from one end. An aperture extends through the valve element to provide a fluid path between the workport and selectively the first port and the second port in different positions of the valve element in the longitudinal bore. A slug of solid material is received within the valve element bore and is operatively connected to transfer a force to a stationary component of the control valve without the force being applied to the valve element. This arrangement results in force due to pressure in the longitudinal bore acting on only an annular surface at the one end of the valve element.
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