US PATENT SUBCLASS 432 / 186
.~.~ Distinct combustion chamber feeds work chamber

Current as of: June, 1999
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432 /   HD   HEATING

120  DF  WORK CHAMBER HAVING HEATING MEANS {12}
159  DF  .~ Combustion products heat work by contact {19}
186.~.~ Distinct combustion chamber feeds work chamber {6}
187  DF  .~.~.~> Having additional feed means diluting combustion products
188  DF  .~.~.~> Work chamber indirectly heating by common wall or connecting flue
189  DF  .~.~.~> Having pump or jet means forcing air into combustion chamber
190  DF  .~.~.~> Distinct vertically spaced combustion products feed openings to work chamber
191  DF  .~.~.~> Plural distinct combustion chambers feed single work chamber
192  DF  .~.~.~> Multiple perforate wall, floor or roof for combustion feed or exit

DEFINITION

Classification: 432/186

(under subclass 159) Apparatus in which combustion takes place in a chamber distinct from the work chamber and the combustion products pass from the combustion chamber into the

work chamber.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

218+, for a house, kiln or container with gas or vapor circulation for contact with the treated material. The gas may be combustion products. However, the combination including a specific combustion product generator is in Class 432.