Automatic flow rate control valve
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United States of America Patent
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Jul 24, 2007
Grant Date -
Feb 2, 2006
app pub date -
Jul 15, 2005
filing date -
Jul 29, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An automatic flow rate control valve, includes a tubular body, defining a flow path between inlet apertures having a gradually variable cross-sectional area and a fluid outlet at one end; a flow control piston is axially movable within the tubular body, under opposite actions of the fluid pressure and a biasing spring, to choke the fluid inlet apertures, while maintaining a constant flow rate. The control piston is in the form of a first cup-shaped element sliding on a second cup-shaped element to define a hydraulic damping chamber, communicating with the flow path.
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