US PATENT SUBCLASS 432 / 95
SHAFT TYPE


Current as of: June, 1999
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432 /   HD   HEATING

95SHAFT TYPE {2}
96  DF  .~> Having combustion products generated in or fed to shaft {5}
102  DF  .~> Having heat emitting tube or flue within or traversing shaft chamber


DEFINITION

Classification: 432/95

(under the class definition) Apparatus comprising a chamber having a substantially vertical axis to which material is fed at an elevated level for gravitation generally downwardly across a heating surface or through a heating gas.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

165+, for a gravity flow type drier. See the search class note to Class 34 in the class definition of Class 432 for the line between Classes 34 and 432.

202, Distillation: Apparatus,

120+, for a vertical retort in which a material is heated to drive off a condensible component.

266, Metallurgical Apparatus, 154, for a metallurgical shaft furnace having a fume arrester and subclasses for a 197+ metallurgical shaft furnace. See the search class notes in the class definition of Class 432 for the line between Classes 266 and 432.