Premixing gas burner

Claim 2

A premixing gas burner comprising two interconnected sheet metal shell members, each of said shell members having impressions which cooperate therebetween to form a plurality of generally parallel disposed mixing tubes, each of said mixing tubes having an upper end, each of said shell members having chamber portions which cooperate therebetween to form a distributing chamber which extends across said mixing tubes, said upper ends of said mixing tubes being in communication with said distributing chamber, and a plurality of burner tubes extending transversely of said distributing chamber, said burner tubes being in communication with said distribution chamber and having means thereon defining burner ports.

Claim 3

A premixing gas burner as set forth in claim 1, in which said burner tubes are vertically elongated and have a rectangular shape in cross-section.

Claim 4

A premixing gas burner as set forth in claim 1, in which said burner tubes are secured to said chamber portions in a straddling relation and are formed on the underside with apertures through which said burner tubes communicate with said distributing chamber.

Claim 5

A premixing gas burner as set forth in claim 3, in which said shell members consist of half-shells contacting each other in a vertical plane of contact and interconnected by folded seams disposed in said plane of contact, one of said folded seams extends at the top of said distributing chamber, and said chamber portions comprise seat portions which are disposed on top of said distributing chamber and in which said burner tubes are seated and which are formed with apertures which interrupt said one folded seam.

Claim 6

A premixing gas burner as set forth in claim 3, in which said half-shells are formed adjacent to said distributing chamber and burner tubes with apertures which are disposed laterally of said plane of contact and through which said distributing chamber communicates with said burner tubes.

Claim 7

A premixing gas burner as set forth in claim 1, in which said chamber portions comprise apertured seat portions disposed on top of said distributing chamber and said burner tubes are insertEd in said apertured seat portions.

Claim 8

A premixing gas burner as set forth in claim 6, in which said burner tubes are formed with lateral apertures which are disposed within said distributing chamber and through which said distributing chamber communicates with said burner tubes.

Claim 9

A premixing gas burner as set forth in claim 1, in which the number of said burner tubes exceeds the number of said mixing tubes.

Claim 10

A premixing gas burner as set forth in claim 1, in which each of said mixing tubes has an open lower end, said shell members consist of half-shells, each of which is formed with at least two hemicylindrical impressions, each of which is formed between two adjacent ones of said mixing tubes, and said hemicylindrical impressions in said half-shells combine to form at least two transversely spaced cylindrical guides, and a nozzle tube is provided and carries upwardly directed gas outlet nozzles axially aligned with said lower ends of respective ones of said mixing tubes, and two upwardly directed plug pins mounted on said nozzle tube, which are fitted into respective ones of said cylindrical guides.

Claim 11

A premixing gas burner as set forth in claim 9, in which at least two vertical holders which are spaced in the longitudinal direction of said nozzle tube are mounted on the latter between adjacent ones of said nozzles, each of said holders is formed with a slot extending in the longitudinal direction of said nozzle tube, each of said holders has an upper end portion formed with a transverse bore, said half-shells comprise portions disposed between adjacent ones of said mixing tubes and extending through said slots in said holders, said half-shells are formed with apertures aligned with said transverse bores, and said half-shells are secured to said holders by threaded fasteners extending through said transverse bores and said apertures aligned therewith.

Claim 12

A premixing gas burner as set forth in claim 1, in which each of said mixing tubes has an open lower end, a nozzle tube is provided and carries upwardly directed gas outlet nozzles axially aligned with said lower ends of respective ones of said mixing tubes, said shell members are formed at the center of their length with an aperture, which is disposed between two adjacent ones of said mixing tubes, and a curved gas supply pipe extends through said aperture and communicates with said nozzle tube.