US PATENT SUBCLASS 122 / 343
.~.~.~ Upper 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  .~.~ Annular lower drum {4}
343.~.~.~ Upper drum {1}
344  DF  .~.~.~.~> Central magazine

DEFINITION

Classification: 122/343

(under subclass 332) Devices in which the water tubes communicate with an annular lower drum and with an upper drum.