US PATENT SUBCLASS 122 / 178
.~.~.~ Vertical aligned fire tube

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

135.1  DF  FLUE {4}
155.1  DF  .~ Vertical {16}
166.1  DF  .~.~ With internal water tube {12}
178.~.~.~ Vertical aligned fire tube {2}
179  DF  .~.~.~.~> Fluid fuel
180  DF  .~.~.~.~> Spur water tube

DEFINITION

Classification: 122/178

(under subclass 166) Devices having small fire tubes in alinement with the flue.

SEE OR SEARCH THIS CLASS, SUBCLASS:

48, and 126, for analogous structures in the fire tube art.