US PATENT SUBCLASS 122 / 349
.~.~ Over firebox

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}
349.~.~ Over firebox {1}
350  DF  .~.~.~> Gas return

DEFINITION

Classification: 122/349

(under subclass 332) Devices in which the vertical water tubes communicate with drums or headers and are located over the firebox.

SEE OR SEARCH THIS CLASS, SUBCLASS:

282, for water tube boilers having looped tubes over the firebox, the axis and plane of the loop being substantially vertical.

318, for water tube boilers having vertical spur tubes.

333, for boilers with vertical water tubes heated by fluid fuel.