Bidirectional force feedback poppet valve
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United States of America Patent
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Apr 23, 2013
Grant Date -
Dec 20, 2007
app pub date -
Jun 16, 2006
filing date -
Jun 16, 2006
priority date (Note) -
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Abstract
A valve has a valve body including a main chamber having a first port and a second port, and a main poppet disposed within the main chamber. The main poppet includes a first surface forming a control chamber within the main chamber. The valve has a first passage communicating the control chamber with the first port, and a second passage communicating the control chamber with the second port. The valve also includes a pilot valve having a pilot poppet for controlling fluid flow from the control chamber to the first port through a third passage, and to the second port through a fourth passage, respectively. The valve may further have a feedback spring coupled between the main poppet and the pilot poppet to provide a force relative to a distance between the main poppet and the pilot poppet.
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