US PATENT SUBCLASS 432 / 179
.~.~ Work chamber exhaust heats chamber feed

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}
179.~.~ Work chamber exhaust heats chamber feed {1}
180  DF  .~.~.~> By regenerative-type heat exchanger {1}

DEFINITION

Classification: 432/179

(under subclass 159) Apparatus including structure in which the gaseous material exhausted from the work chamber transfer heat to combustion material being fed to the chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

70, for a means between the work chamber and the heat exchanger separating solid particles or slag from the exhausting work chamber gas.