US PATENT SUBCLASS 122 / 389
.~.~ Surface exit

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

379  DF  CLEANING {9}
*  DD  .~ Blow off {3}
389.~.~ Surface exit

DEFINITION

Classification: 122/389

(under subclass 379) Devices having means for blowing off or removing the surface water of the boiler, i.e., "skimmers".

SEE OR SEARCH THIS CLASS, SUBCLASS:

400, for combinations of skimmers with a trapped circulating conduit.