Apparatus and method for controlling the level of a liquid in a

Details Apparatus and method for controlling the level of a liquid in a Apparatus and method for controlling the level of a liquid in a

1983-05-20

1984-05-15

Walton, George L.

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

137406, 137408, 137572, 137579, 222 1, 222 56, F16K 2118, F17D 300

Patent

active

044482108

ABSTRACT:
The invention disclosed herein is a "fail safe" apparatus for controlling the level of a liquid in a tank. The apparatus includes a holding tank for temporarily containing the liquid. There is an access opening along the top surface of the tank so that the tank is open to the atmosphere at all times. An outlet conduit, with a swivel joint therein, connects the bottom of the tank to an ultimate use point for the liquid. One end of a delivery conduit extends into the holding tank and the opposite end connects into a source for the liquid. A fill valve in the delivery conduit is linked to the holding tank by a mechanical valve operator and an air spring is fastened to the tank. When liquid is drawn out of the tank, the air spring expands and swivels the tank to a position which opens the fill valve. Filling the tank with liquid causes the air spring to compress and swivels the tank in the opposite direction to a position which closes the fill valve.

REFERENCES:
patent: 625339 (1899-05-01), Krueger
patent: 954175 (1910-04-01), Engebretson
patent: 1211753 (1917-01-01), Rakestraw
patent: 1425340 (1922-08-01), Sabin
patent: 1798208 (1931-03-01), Kratzer
patent: 1852975 (1932-04-01), Kratzer
patent: 2307324 (1943-01-01), Larson
patent: 2708435 (1955-05-01), Lewis
patent: 3285276 (1966-11-01), Schipper
patent: 3677279 (1972-07-01), Lenfant

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