US PATENT SUBCLASS 137 / 417
.~.~.~ Pilot float released

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

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
409  DF  .~ By float controlled valve {11}
416  DF  .~.~ Quick acting {4}
417.~.~.~ Pilot float released

DEFINITION

Classification: 137/417

(under subclass 416) Apparatus in which the float operating the flow controlling means is restrained from freely responding to the changing liquid level and is released from restraint by a second or auxiliary float.

SEE OR SEARCH THIS CLASS, SUBCLASS:

420+, for other trip mechanisms for float controlled valves.