US PATENT SUBCLASS 122 / 402
.~.~.~ Circulating pump

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

379  DF  CLEANING {9}
397  DF  .~ Trapped circuit {3}
400  DF  .~.~ Surface exit {4}
402.~.~.~ Circulating pump

DEFINITION

Classification: 122/402

(under subclass 400) Devices in which a circulating pump is in the circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

404, for similar arrangement of conduit and trap, with a steam jet for circulating the water.