US PATENT SUBCLASS 122 / 382
.~.~ Bottom

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

379  DF  CLEANING {9}
*  DD  .~ Blow off {3}
382.~.~ Bottom {1}
383  DF  .~.~.~> Internal conduit {5}

DEFINITION

Classification: 122/382

(under subclass 379) Devices provided with means for blowing off the boiler at the bottom and removing the sediment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

381, for devices for blowing off the boiler both at the bottom and the surface of the water.