Importance

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Abstract

A multiple inshot-type gas burner structure is formed from a pair of facing, intersecured stamper sheet metal plates. A spaced plurality of parallel, rectangularly cross-sectioned burner bodies are defined by facing triangular indentation pairs in the plates and have, at front outlet end portions thereof, side indentations which serve to mix air and gaseous fuel received at rear end portions of the burner bodies, and to divert a portion of the fuel/air mixture into crossover channels intercommunicating front interior portions of the burner bodies. The crossover channels have central arcuate closed portions that cooperate with progressively sized standoff dimples extending between opposite wall portions of the channels to provide an even crossover flame pattern along the outlet slot section of each channel. At the outlet end of each burner are four flame retention tabs which are transverse to the flow axis of the burner body and serve to prevent induced secondary combustion air from causing undesirable main flame liftoff. Originally rectangular inlet end portions of the burner bodies are laterally inwardly deformed to define generally circular sections that receive and firmly hold hexagonal gas supply orifice fittings mounted on a gas supply manifold pipe. Immediately forward of these deformed circular sections a plurality of primary air inlet openings are formed through the burner body walls.

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First Claim