US PATENT SUBCLASS 122 / 64
.~.~.~ Interposed combustion chamber

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

44.1  DF  FIRE TUBE {11}
51  DF  .~ Horizontal {22}
58 R  DF  .~.~ Drop water firebox {11}
64.~.~.~ Interposed combustion chamber

DEFINITION

Classification: 122/64

(under subclass 58) Devices with a separate combustion chamber between the firebox and the fire tubes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

95, and 100, for other types of boilers with an interposed combustion chamber between the firebox and the fire tubes.