Flow control valve
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United States of America Patent
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Nov 15, 2022
Grant Date -
Sep 9, 2021
app pub date -
Mar 3, 2021
filing date -
Mar 4, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A flow control valve includes a housing having a valve chamber, an inlet port, an outlet port, and a valve seat. In addition, the flow control valve includes a valve body disposed in the valve chamber, an actuator having an output rotational shaft, a feed screw mechanism to convert forward and reverse rotational motion of the output rotational shaft to axial reciprocating motion of the valve body, a backlash preventive spring positioned between the housing and the valve body, and a spring supporting device formed on the housing and having a spring seating surface. The spring seating surface is spaced from the valve seat in an opening direction of the valve body.
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