Fluid flow control device

Details Fluid flow control device Fluid flow control device

1990-01-30

1991-01-01

Cohan, Alan

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

137569, 137199, F16K 3122

Patent

active

049811541

ABSTRACT:
A fluid flow control device operable in a gas purge mode, liquid flow mode or backflow restriction mode for use with a fluid circulating system to selectively control the direction of fluid flow through the fluid circulating system, the fluid flow control device comprises a valve body including a lower fluid chamber and an upper float chamber formed therein and a spherical float movable disposed within the upper float chamber to control the direction of fluid flow through the fluid flow control device, the valve body includes a gas outlet, a fluid outlet, a liquid outlet and a fluid inlet such that fluid entering the upper float chamber controls the position of the spherical float therein to cause gas to flow through the gas outlet and liquid to flow through the liquid outlet and prevent backflow of gas or liquid through the fluid outlet.

REFERENCES:
patent: 1993267 (1935-03-01), Ferguson
patent: 3285270 (1966-11-01), Klinefelter
patent: 3323465 (1967-06-01), Stillebroer
patent: 3601140 (1971-08-01), Hooper
patent: 3644061 (1972-02-01), McFarlin
patent: 4019680 (1977-04-01), Norris
patent: 4104004 (1978-08-01), Graef
patent: 4459468 (1984-07-01), Bailey
patent: 4614480 (1986-09-01), Hardison

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