US PATENT SUBCLASS 122 / 357
.~.~.~ Longitudinal drum

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

235.11  DF  WATER TUBE {52}
355  DF  .~ Zigzag {3}
*  DD  .~.~ Over bridge wall {2}
357.~.~.~ Longitudinal drum

DEFINITION

Classification: 122/357

(under subclass 355) Devices having a longitudinally posited drum above the tubes, which extend in a zigzag manner over the bridge wall.

SEE OR SEARCH THIS CLASS, SUBCLASS:

273+, for other types of water tube boilers having a longitudinal drum.