Flow control valve
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United States of America Patent
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-
Feb 25, 2014
Grant Date -
N/A
app pub date -
Jan 10, 2011
filing date -
Jan 11, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A fast acting flow control valve uses an electronically-actuated, short-stroke 3-way pilot poppet to actuate a primary poppet valve, for example, to provide impulse thrust to an air or space vehicle. The pilot poppet arrangement has an electromagnetic actuator for positioning the pilot poppet with respect to first and second seats. When the pilot poppet is sealed against the first seat a pressure passage communicates with seat openings and a vent passage of the valve is blocked from the seat openings. When the pilot poppet is sealed against the second seat the pressure passage is blocked from the seat openings and the vent passage communicates with the seat openings. The primary valve arrangement has a primary poppet that seals against a primary seat when the pilot poppet is sealed against the first seat and is unseated when the pilot poppet is sealed against the second seat.
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