US PATENT SUBCLASS 122 / 184
.~.~.~.~ Annular firebox

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}
*  DD  .~.~ Standpipe {1}
*  DD  .~.~.~ Water tube {3}
184.~.~.~.~ Annular firebox

DEFINITION

Classification: 122/184

(under subclass 155) Devices having a stand pipe provided with water tubes or merely a vertical pipe extending downwardly within the flue through the fuel grate to form an annular firebox.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29, for miscellaneous boilers with an annular fire tube.

127, for vertical fire tube boilers with an annular water firebox.