US PATENT SUBCLASS 137 / 122
.~.~.~.~.~ Float controlled

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

87.01  DF  SELF-PROPORTIONING OR CORRELATING SYSTEMS {8}
109  DF  .~ Self-controlled branched flow systems {4}
118.01  DF  .~.~ Plural outflows {5}
119.01  DF  .~.~.~ Alternately or successively substituted outflow {7}
121  DF  .~.~.~.~ Control by filling outlet tank or receiver {1}
122.~.~.~.~.~ Float controlled

DEFINITION

Classification: 137/122

(under subclass 121) Systems in which the filling of the tank

or receiver is sensed by means of a float.

SEE OR SEARCH THIS CLASS, SUBCLASS:

386+, particularly subclasses 397, 398+ and 409+ for other flow control responsive to a float, and see the search notes to subclass 409.