Abstract: A gas burner includes: a base having a bottom wall and a surrounding wall that extends upwardly from the bottom wall, that cooperates with the bottom wall to define an inner space, and that is formed with flame apertures in fluid communication with the inner space; a partitioning unit dividing the inner space into a main gas chamber and at least one buffer gas chamber separated from the main gas chamber, the partitioning wall being formed with through-holes that are in fluid communication with the main gas chamber and the buffer gas chamber and that open toward the bottom wall of the base; and a gas input conduit secured to the bottom wall of the base and in fluid communication with the main gas chamber.

Abstract: A gas burner includes a looped head seat formed by punching a metal plate, and defining therein a surrounding duct therein which is fluidly communicated with a gas conduit for supplying fuel gas to the surrounding duct, and a looped burner cap engaged with the head seat to define a partition space therebetween. One of inner and outer surrounding regions of an upper wall of the head seat has a plurality of intercommunicating ports, whereas one of corresponding inner and outer surrounding regions of an upper cap wall of the burner cap has a plurality of discharging orifices such that the fuel gas in the surrounding duct is guided to flow through the intercommunicating ports into the partition space and is discharged through the discharging orifices. By means of the arrangement of the ports and the orifices, occurrence of backfires in the surrounding duct can be prevented.

Abstract: A gas burner includes several length-adjustable outer gas delivery pipes interposed between an annular outer gas outlet member and a head seat, and a length-adjustable inner gas delivery pipe interposed between an inner gas outlet member and the head seat.