US PATENT SUBCLASS 432 / 117
.~ Having work or work atmosphere feed or discharge structure

Current as of: June, 1999
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432 /   HD   HEATING

103  DF  TUMBLER-TYPE ROTARY - DRUM FURNACE {8}
117.~ Having work or work atmosphere feed or discharge structure

DEFINITION

Classification: 432/117

(under subclass 103) Apparatus including structure by which work, combustion material, inert gas or a treating agent is fed to the rotary drum.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

130+, for a tumbler drum drier with gas or vapor flow means; and subclass 142 for a tumbler drum drier of the axial material feed type.