US PATENT SUBCLASS 137 / 391
.~ Control of both inflow and outflow of tank

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
391.~ Control of both inflow and outflow of tank

DEFINITION

Classification: 137/391

(under subclass 386) Apparatus which includes means responsive to variations of the level of the accumulated liquid to control both the inflow to and outflow from an accumulation of liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

214, for high and low level response associated with gas vents or whistles in diverse fluid containing pressure systems.

SEE OR SEARCH CLASS

222, Dispensing,

68, for plural float operated flow controllers in dispensers.