Flow control system and control valve having closure assistance
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United States of America Patent
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Jun 30, 2020
Grant Date -
Feb 5, 2015
app pub date -
Aug 4, 2014
filing date -
Aug 2, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control valve includes a piston-housing having a hollow portion. The hollow portion has a first end, an open end, first and second internal chambers, and a fluid port configured to allow fluid to exit the second chamber. The first chamber is nearer the first end, and the second chamber is nearer the open end. A piston is located within the housing and is adapted for reciprocal motion. The piston includes a first and second seal-engaging portions. The first seal-engaging portion has a diameter that is less than the diameter of the second seal-engaging portion.
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Cited Art Landscape
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