US PATENT SUBCLASS 122 / 391
.~.~ Horizontal fire tube boiler

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

379  DF  CLEANING {9}
390  DF  .~ Fluid jet {2}
391.~.~ Horizontal fire tube boiler

DEFINITION

Classification: 122/391

(under subclass 390) Devices comprising a horizontal fire tube boiler and cleaner attached permanently to the boiler or to the furnace walls.

SEE OR SEARCH CLASS

110, Furnaces,

147, 150, 188+, 199+, 296+, and 297+ for feeding air and steam jets that are intended to aid combustion, but which might also act as fluid jet cleaning devices.