US PATENT SUBCLASS 122 / 326
.~.~.~.~ Cross

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

235.11  DF  WATER TUBE {52}
324  DF  .~ Straddle {2}
*  DD  .~.~ Plural upper drum {1}
325  DF  .~.~.~ Plural lower drum {1}
326.~.~.~.~ Cross

DEFINITION

Classification: 122/326

(under subclass 325) Devices having the tubes cross over the combustion chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

329, for this type of boiler having a single upper drum.