Wheatstone bridge check valve arrangement
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United States of America Patent
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-
May 3, 2016
Grant Date -
Jun 26, 2014
app pub date -
Dec 20, 2013
filing date -
Dec 25, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A device is disclosed that may include a spool valve having a first connector and a second connector and a spool movable for controlling flow between the first connector and the second connector, regardless of direction of flow through the spool valve. A pilot valve having an inlet and an outlet develops a command pressure. A feedback circuit having an inlet and an outlet develops a feedback pressure. The spool valve may be responsive to the command pressure and the feedback pressure. A fluid rectifier circuit is provided to connect the higher pressure of the first connector and second connector to the pilot valve inlet and feedback circuit inlet, and connect the other of the first connector and second connector to the pilot valve outlet and feedback circuit outlet.
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