US PATENT SUBCLASS 122 / 275
.~ Loop

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

235.11  DF  WATER TUBE {52}
275.~ Loop {3}
276  DF  .~.~> Firebox enclosing
277  DF  .~.~> Over bridge wall
*  DD  .~.~> Over firebox {5}

DEFINITION

Classification: 122/275

(under subclass 235) Miscellaneous water tube boilers whose tubes are in the form of loops.

SEE OR SEARCH THIS CLASS, SUBCLASS:

132, and 185, for other types of boilers provided with looped water tubes.

244+, for boilers of the water tube type having either looped or coiled tubes or both combined.

355+, for analogous structure.