Control valve assembly with a workport pressure regulating device
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United States of America Patent
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Apr 30, 2013
Grant Date -
Dec 9, 2010
app pub date -
Jun 8, 2010
filing date -
Jun 9, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hydraulic system has several valve sections, each having a directional valve that controls fluid flow from a pump to a hydraulic actuator. A mechanism senses a greatest pressure among the hydraulic actuators to provide a load sense pressure. One valve sections has a pressure compensation apparatus includes a pressure compensation valve that reduces fluid flow between a given directional valve and an associated hydraulic actuator in response to pressure at a control port, and a pressure regulating valve that responds to the load sense pressure and pressure in the associated hydraulic actuator by selectively applying output pressure from the pump and the load sense pressure to the control port.
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