US PATENT SUBCLASS 431 / 285
.~ Having common flame chamber or shield means

Current as of: June, 1999
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431 /   HD   COMBUSTION

278  DF  SEPARATELY SUPPLIED OR CONTROLLED, PHYSICALLY RELATED FLAME HOLDERS, E.G., DIVERSE FUELS, PILOT AND MAIN, ETC. {7}
285.~ Having common flame chamber or shield means

DEFINITION

Classification: 431/285

(under subclass 278) Apparatus forming a burner head assembly

that has as a part thereof means forming an enclosed or shielded combustion space fed by both sections.