US PATENT SUBCLASS 122 / 351
.~.~.~ Plural lower longitudinal drum

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

235.11  DF  WATER TUBE {52}
332  DF  .~ Vertical {10}
*  DD  .~.~ Plural upper longitudinal drum {1}
351.~.~.~ Plural lower longitudinal drum

DEFINITION

Classification: 122/351

(under subclass 332) Devices in which the vertical water tubes are in communication with a plurality of horizontally and longitudinally posited upper and lower drums forming a plurality of fireboxes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

240, for water tube boilers having a plurality of fireboxes not otherwise provided for.