Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1975-02-04
1977-03-15
Cohan, Alan
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137415, F16K 3134
Patent
active
040118843
ABSTRACT:
A liquid-level valving device, particularly useful as an air-relief valve, comprises a housing including a first chamber having a control member axially movable in an opening therein, and a second chamber defined by a piston carried at the opposite end of the control member and a cylinder fixed to the housing. The second chamber has a small vent opening through which the control member extends, the latter having an axial bore establising communication between the two chambers. The cross-sectional area of the first-chamber end of the control member is less than that of its second-chamber end, and the mouth of the bore at the former end of the control member is of larger diameter than that of the vent opening in the second chamber, such that upon an increase in pressure in the first chamber, the pressure in the second chamber is likewise increased to cause the control member to be moved further into the first chamber to open the valve.
The foregoing device is disclosed as embodied in an air-relief valve having a float in the first chamber coaxial with the control member for closing and opening its bore according to the level of the liquid in the first chamber.
REFERENCES:
patent: 952605 (1910-03-01), Connors
patent: 1122994 (1914-12-01), Pappano
patent: 1296206 (1919-03-01), Morali
patent: 1914645 (1933-06-01), Power
patent: 2247930 (1941-07-01), Turner
patent: 2603493 (1952-07-01), Rusconi
patent: 2999509 (1961-09-01), Hankison
patent: 3054419 (1962-09-01), Farrell
patent: 3635238 (1972-01-01), Hankison
Barish Benjamin J.
Cohan Alan
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