US PATENT SUBCLASS 137 / 428
.~.~ In separate communicating float chamber

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}
428.~.~ In separate communicating float chamber

DEFINITION

Classification: 137/428

(under subclass 409) Apparatus where the float is in a chamber separate from the holder for the liquid accumulation, but which chamber is connected therewith so that the variation in liquid level in the chamber corresponds to that in the holder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

406+, for communicating measuring vessels responding to weight or head of accumulated fluid.

571+, for plural tanks connected for serial flow, and see the search notes to subclass 571.