US PATENT SUBCLASS 122 / 112
.~.~.~ Water firebox

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

44.1  DF  FIRE TUBE {11}
*  DD  .~ Transverse {3}
111  DF  .~.~ Vertical boiler {1}
112.~.~.~ Water firebox

DEFINITION

Classification: 122/112

(under subclass 111) Devices having a water firebox.

SEE OR SEARCH THIS CLASS, SUBCLASS:

187, for vertical flue boilers having fire tubes extending from the inner large flue to the outside of the boiler.

220, for sectional boilers.