US PATENT SUBCLASS 432 / 116
.~ Having protective cooling structure

Current as of: June, 1999
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432 /   HD   HEATING

103  DF  TUMBLER-TYPE ROTARY - DRUM FURNACE {8}
116.~ Having protective cooling structure

DEFINITION

Classification: 432/116

(under subclass 103) Apparatus including structure protecting an element of the drum device from heat damage by cooling the element.

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115, for a cooler seal in a rotary tumbler drum device.