US PATENT SUBCLASS 122 / 387
.~.~.~.~ Scraper

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

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

DEFINITION

Classification: 122/387

(under subclass 383) Devices provided with scrapers for removing the incrustation or sediment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

379, for scrapers attached to the boiler, but movable and not having a blow-off conduit,

384, for steam ejectors.

SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning,

104.16, for mechanical boiler cleaners that are not attached to the boiler.