Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1975-04-16
1976-09-28
Cohan, Alan
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
137445, 137446, 137448, 137426, 1376142, E03D 133, F16K 3118
Patent
active
039825574
ABSTRACT:
A fluid flow control valve for automatic fluid level control in a reservoir is provided having a valve chamber with axially aligned inlet and outlet orifices, a valve closure element disposed in the chamber and having an actuating stem projecting outwardly through the outlet orifice, and a float-type lever arm engageable with the actuating stem. The valve closure element is normally maintained in closing relationship to the outlet orifice by the pressurized fluid at the inlet side with the valve designed for operation over a wide range of fluid pressures. Movement of the lever arm in response to the fluid level is effective in rocking the valve closure element through its actuating stem to a position where fluid may flow through the outlet orifice. The lever arm is provided with a weighted float to assure positive operation of the valve in high pressure fluid systems and the lever arm is formed with means readily permitting adjustment thereof to precisely determine the fluid level in the reservoir. The inlet orifice is provided with a check valve preventing reverse fluid flow through the valve in the event of loss of inlet fluid pressure.
REFERENCES:
patent: 1109169 (1914-09-01), LeMay
patent: 1512017 (1924-10-01), Field
patent: 1943769 (1934-01-01), Melio
patent: 2271419 (1942-01-01), Egan
patent: 2559046 (1951-07-01), Peters
patent: 2608990 (1952-09-01), Crockett
patent: 3038491 (1962-06-01), Beazley
patent: 3323468 (1967-06-01), Thompson
patent: 3398927 (1968-08-01), Ruter
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