US PATENT SUBCLASS 432 / 222
.~ Material heated by mixing with combustion products of generator

Current as of: June, 1999
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432 /   HD   HEATING

219  DF  HEAT GENERATOR HEATS GAS OR LIQUID MATERIAL IN A FLOW STRUCTURE {3}
222.~ Material heated by mixing with combustion products of generator {1}
223  DF  .~.~> Having means for indirectly exchanging heat between combustion products and material

DEFINITION

Classification: 432/222

(under subclass 219) Apparatus in which a stream of fluid is heated by mixing it with products of combustion from a burner.

SEE OR SEARCH CLASS

60, Power Plants, 39.53 for a combustion products generator having means for the addition of steam or water to the

products. This combination is classified in Class 60 even though there is no disclosure for power purposes.

431, Combustion,

341, for a pot type combustion device including an exhaust flue having air feed passages and subclasses 351+ for a flame holder having a flame enclosing structure with means feeding air at axially spaced points along the flame.