US PATENT SUBCLASS 122 / 185
.~.~.~.~ Loop

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}
185.~.~.~.~ Loop

DEFINITION

Classification: 122/185

(under subclass 155) Devices having a vertical stand pipe, with looped water tubes located within the flue.

SEE OR SEARCH THIS CLASS, SUBCLASS:

215+, for similar art in sectional boilers.

244+, and 281, for structure of stand pipe and water tubes.