DIFFERENTIAL CONTROL VALVE
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United States of America Patent
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Issued Date -
Jun 16, 2016
app pub date -
Feb 9, 2016
filing date -
Feb 16, 2011
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Abstract
A differential control valve including a housing having an interior surface defining an internal chamber with a central axis. The valve further includes a first port; a second port and a third port, each in communication with the internal chamber. A first valve seat is disposed along the interior surface of the housing circumscribed about the central axis and a second valve seat is circumscribed about the first valve seat. A sealing member defines a sealed position and an open position with respect to the valve seats. A spring member biases the seal member toward the open position and is disposed between the sealing member and the interior of the housing.
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