Gas burner

Abstract

A radiative heat gas burner is described of the type which may be used to fire a domestic grill. The burner head has an inlet port and comprises a pressing which together with a perforated metal sheet defines a chamber in which a combustion gas flows prior to flowing through the perforations in the sheet and combusting thereon. The sheet of metal sealingly connected to the pressing forms a combustion surface on which the combustion of gas flowing through the perforations occurs, but the invention lies in the discovery that it is not necessary to provide large apertures in the sheet which reveal portions of gauze sheets disposed parallely behind the combustion surface and which glow and thus radiate heat during operation of the burner. It is merely necessary to provide a pattern of small perforations over the entire surface of the combustion sheet, the number of said perforations being sufficient to allow for sufficient gas flow therethrough to support stable combustion, and their pattern being ideally in rows which intersect with other rows in a substantially perpendicular manner.

I claim:  
     
         1 . A radiative heat burner head having an inlet port by which the burner is provided with a combustible gas, a chamber in which the Combustion gas flows prior to combustion, and a combustion surface through which the gas passes from the chamber to combust thereon or proximate thereto, characterized in that the combustion surface is provided with a pattern of perforations, the total area of perforation as compared to the area of the combustion surface being sufficient to permit a sufficient quantity of gas to flow therethrough, and each perforation being of size which prevents any burn back within the chamber.  
     
     
         2 . A burner according to    claim 1    characterized in that the combustion surface is formed from a sheet of stainless steel.  
     
     
         3 . A burner according to    claim 2    characterized in that the pattern of perforations within the sheet creates a substantially uniform flame profile on or proximate the surface thereof.  
     
     
         4 . A burner according to    claim 1    characterized in that the combustion surface is provided with indentations to prevent significant buckling of the said surface during combustion thereon or proximate thereto.  
     
     
         5 . A burner according to    claim 2    characterized in that the combustion surface is provided with indentations to prevent significant buckling of the said surface during combustion thereon or proximate thereto.  
     
     
         6 . A burner according to    claim 3    characterized in that the combustion surface is provided with indentations to prevent significant buckling of the said surface during combustion thereon or proximate thereto.  
     
     
         7 . A burner according to    claim 1    characterized in that baffle means are provided internally of the chamber to ensure substantially even distribution of the combustion gas within the chamber and behind the combustion surface.  
     
     
         8 . A burner according to    claim 2    characterized in that baffle means are provided internally of the chamber to ensure substantially even distribution of the combustion gas within the chamber and behind the combustion surface.  
     
     
         9 . A burner according to    claim 3    characterized in that baffle means are provided internally of the chamber to ensure substantially even distribution of the combustion gas within the chamber and behind the combustion surface.  
     
     
         10 . A burner according to    claim 4    characterized in that baffle means are provided internally of the chamber to ensure substantially even distribution of the combustion gas within the chamber and behind the combustion surface.  
     
     
         11 . A burner according to    claim 1    characterized in that the burner head is incorporated in a conventional gas cooker and provides a grill function therefor.  
     
     
         12 . A burner according to    claim 2    characterized in that the burner head is incorporated in a conventional gas cooker and provides a grill function therefor.  
     
     
         13 . A burner according to    claim 3    characterized in that the burner head is incorporated in a conventional gas cooker and provides a grill function therefor.  
     
     
         14 . A burner according to    claim 4    characterized in that the burner head is incorporated in a conventional gas cooker and provides a grill function therefor.  
     
     
         15 . A burner according to    claim 7    characterized in that the burner head is incorporated in a conventional gas cooker and provides a grill function therefor.  
     
     
         16 . A burner according    claim 11    characterized in that the burner head is disposed with its combustion surface facing downwardly above a grill tray on which food products to be cooked may be placed.  
     
     
         17 . A burner according to    claim 1    characterized in that the combustion surface is provided with means for generating a spark to ignite the combustion gas.  
     
     
         18 . A burner according to    claim 2    characterized in that the combustion surface is provided with means for generating a spark to ignite the combustion gas.  
     
     
         19 . A burner according to    claim 3    characterized in that the combustion surface is provided with means for generating a spark to ignite the combustion gas.  
     
     
         20 . A burner according to    claim 4    characterized in that the combustion surface is provided with means for generating a spark to ignite the combustion gas.  
     
     
         21 . A burner according to    claim 7    characterized in that the combustion surface is provided with means for generating a spark to ignite the combustion gas.  
     
     
         22 . A burner according to    claim 11    characterized in that the combustion surface is provided with means for generating a spark to ignite the combustion gas.  
     
     
         23 . A burner according to    claim 16    characterized in that the combustion surface is provided with means for generating a spark to ignite the combustion gas.  
     
     
         24 . A burner according to    claim 17    characterized in that the sparking means is affixed through the combustion surface, an indentation being further provided on said combustion surface which acts as the sparking contact against which the spark discharges.