Automatic flow rate control valve

Details Automatic flow rate control valve Automatic flow rate control valve

2007-07-24

2007-07-24

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S504000, C137S517000, C137S514000, C137S269000

Reexamination Certificate

active

11181995

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.

REFERENCES:
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patent: 5174330 (1992-12-01), Golestan et al.
patent: 5178324 (1993-01-01), Moesby
patent: 5524670 (1996-06-01), Castle
patent: 5931191 (1999-08-01), Taube et al.
patent: 6311712 (2001-11-01), Meyer
patent: 6532987 (2003-03-01), Itoh et al.
patent: 2 370 096 (2000-12-01), None

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