US PATENT SUBCLASS 432 / 105
.~ Having combustion products generated in or fed to drum

Current as of: June, 1999
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432 /   HD   HEATING

103  DF  TUMBLER-TYPE ROTARY - DRUM FURNACE {8}
105.~ Having combustion products generated in or fed to drum {3}
106  DF  .~.~> Including plural, distinct serially connected work chambers
107  DF  .~.~> And having externally heated drum surface or indirect heating flue
108  DF  .~.~> Work advancing type (e.g., steady flow of work) {3}

DEFINITION

Classification: 432/105

(under subclass 103) Apparatus having structure by which combustion products are generated within the work chamber or by which externally generated combustion products are fed into the chamber.