US PATENT SUBCLASS 137 / 398
.~.~ By float

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

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
395  DF  .~ Control of outflow from tank {2}
398.~.~ By float {1}
399  DF  .~.~.~> Low level safety cut-off

DEFINITION

Classification: 137/398

(under subclass 395) Apparatus which includes one or more floats responsive to a change in the level of the accumulated liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

391, for level responsive control of both inflow and outflow of a tank.

409+, for similar devices in which the valve is not necessarily an outlet valve, and see the search notes to subclass 409.

SEE OR SEARCH CLASS

4, Baths, Closets, Sinks, and Spittoons, 9+, for water closet tanks and bowls having float control means, especially subclasses 331 and 353+.

222, Dispensing,

64+, for level responsive control of dispensers.