Fluid handling – Diverse fluid containing pressure systems – Gas pressure storage over or displacement of liquid
Patent
1985-06-27
1986-09-16
Cohan, Alan
Fluid handling
Diverse fluid containing pressure systems
Gas pressure storage over or displacement of liquid
62 55, 137386, F17C 702
Patent
active
046116230
ABSTRACT:
This invention relates to a device for monitoring a liquid level in a first vessel and for effecting the transfer of liquid to the first vessel from a second vessel upon the liquid level in the first vessel reaching a predetermined minimum point. The device comprises a pressure sensitive appliance which is in contact with a gas in a first and in a second chamber. The pressure sensitive appliance is movable between a first position and a second position. The second position is towards the first chamber and occurs when the pressure in the first chamber is lower than the pressure in the second chamber. The first chamber is vented to an ambient atmosphere. A conduit is also provided which is in gas communication with the first chamber and with the interior of the second vessel. A valve is associated with the pressure sensitive appliance and is used to alternately seal off and leave open the gas communication between the first chamber and the second vessel upon the movement of the pressure sensitive appliance to the positions. The second chamber is in gas communication with an elongated hollow stem which is closed at its other end. This stem has a portion which extends into the interior of the first vessel to a point which is below the predetermined minimum liquid level and a portion, exterior of the first vessel, which is in contact with the ambient atmosphere. Insulation is utilized to insulate a lower portion of the stem within the first vessel.
REFERENCES:
patent: 2570451 (1951-10-01), Hottenroth
patent: 2756765 (1956-07-01), Agule
patent: 3605424 (1971-09-01), Paine
patent: 3681546 (1972-08-01), Coin
Cohan Alan
Louisiana State University and Mechanical College
Spielman, Jr. Edgar E.
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