US PATENT SUBCLASS 414 / 151
.~.~ In helical or tortuous path


Current as of: June, 1999
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414 /   HD   MATERIAL OR ARTICLE HANDLING

147  DF  CHAMBER OF A TYPE UTILIZED FOR A HEATING FUNCTION AND MATERIAL CHARGING OR DISCHARGING MEANS THEREFOR {6}
150  DF  .~ Including driven device and/or inclined flow path to carry or convey material into, within, and out of chamber {8}
151.~.~ In helical or tortuous path


DEFINITION

Classification: 414/151

In helical or tortuous path:

(under subclass 150) Apparatus wherein the driven device or inclined path for carrying or conveying the material within the chamber causes the material to follow a helical or tortuous path through the chamber.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

203+, for conveyors providing plural or zigzag paths for treated material within kilns, houses, or containers.