Tube in Tube Burner For A Barbecue

Abstract

A tube burner has a venturi tube concentrically mounted within a burner tube. The burner tube has openings along each side that decrease progressively in size from the upstream end to the downstream end of the burner tube. The tube burner generates substantially even heat at the openings in the burner tube. A method of constructing a tube burner is provided whereby the venturi tube is mounted substantially within the burner tube.

1 . A tube burner for use with a flammable gas supply for a barbecue grill, said burner comprising a top, bottom and two sides and having a venturi tube and a burner tube, said venturi tube being concentrically mounted partially within said burner tube, said venturi tube having a venturi therein and having a connector at an outer end for connection to said gas supply, said outer end having an air inlet, said venturi tube terminating partly along a length of said burner tube, said venturi tube having at least one opening therein downstream from said venturi, said at least one opening being located within said burner tube, said burner tube having a plurality of openings along each side thereof through which said gas/air mixture entering said burner tube from said venturi tube can escape for combustion. 
   
   
       2 . A tube burner as claimed in  claim 1  wherein said at least one opening in said venturi tube is located at an inner end of said tube. 
   
   
       3 . A tube burner as claimed in  claim 2  wherein said at least one opening in said venturi tube within said burner tube is a plurality of openings in a top and bottom of said venturi tube, a size of said at least one opening at an inner end of said venturi tube being at least reduced in size. 
   
   
       4 . A tube burner as claimed in  claim 1  wherein said at least one in said venturi tube within said burner tube is a plurality of openings and a top and bottom of said venturi tube. 
   
   
       5 . A tube burner as claimed in any one of  claims 1 ,  2  or  3  wherein said plurality of openings along each side of said burner tube have a larger size at said end where said venturi tube is located than at an opposite end. 
   
   
       6 . A tube burner as claimed in any one of  claims 1 ,  2  or  3  wherein said plurality of openings along a side of said burner tube decrease in size from said end where said venturi tube is located to said opposite end. 
   
   
       7 . A tube burner as claimed in  claim 1  wherein said venturi tube extends substantially into said burner tube. 
   
   
       8 . A tube burner as claimed in  claim 1  wherein substantially two thirds of a length of said venturi tube is located inside of said burner tube. 
   
   
       9 . A tube burner for use with a flammable gas supply, the burner comprising two ends and two sides and having a venturi tube and a burner tube, said venturi tube being concentrically mounted substantially within said burner tube, said venturi tube having at least one opening therein within said burner tube, said venturi tube having a venturi therein and having a connector at an outer end for connection to said gas supply, said outer end having an air inlet, said burner tube having a plurality of openings along each side thereof through which a gas/air mixture entering said burner tube from said venturi tube can escape for combustion. 
   
   
       10 . A tube burner as claimed in  claim 9  wherein said at least one opening in said venturi tube comprises a plurality of openings in a top and bottom of said venturi tube. 
   
   
       11 . A tube burner for use with a flammable gas supply, said burner comprising a burner tube and a venturi tube, said venturi tube having a venturi therein, said venturi tube extending from said venturi into said burner tube, said burner being connected to said gas supply, and having an air inlet upstream of said venturi, there being a passage connecting said gas supply and said air inlet to said venturi, said venturi tube having at least one opening therein within said burner tube for a gas/air mixture to pass into the burner tube, said burner tube having a plurality of openings along each side thereof through which said gas/air mixture entering said burner tube from said venturi tube can escape for combustion. 
   
   
       12 . A tube burner as claimed in  claim 11  wherein said venturi tube is concentrically mounted with said burner tube. 
   
   
       13 . A tube burner as claimed in  claim 12  wherein said air inlet is located in said venturi tube and said venturi tube has a connector for receiving said gas supply. 
   
   
       14 . A tube burner as claimed in  claim 11  wherein said at least one opening in said venturi tube is located at an inner end of said tube. 
   
   
       15 . A tube burner as claimed in  claim 14  wherein said at least one opening in said venturi tube within said burner tube is a plurality of openings in a top and bottom of said venturi tube, a size of said at least one opening at an inner end of said venturi tube being at least reduced in size. 
   
   
       16 . A tube burner as claimed in  claim 11  wherein said at least one opening in said venturi tube is a plurality of openings in a top and bottom of said venturi tube. 
   
   
       17 . A method of constructing a tube burner for use with a barbecue grill and a flammable gas supply, said burner having a burner tube and a venturi tube, said method comprising mounting said venturi tube at least partially within said burner tube at an upstream end of said burner tube, said venturi tube having an am inlet and a connector for connecting said outer end to said gas supply, installing at least one opening in that part of the venturi tube located within said burner tube, installing a plurality of openings along each side of said burner tube through which a gas/air mixture entering said burner tube from said venturi tube can escape. 
   
   
       18 . A method as claimed in  claim 17  including the step of mounting the venturi tube substantially within the burner tube. 
   
   
       19 . A method as claimed in  claim 18  including the step of mounting said venturi tube within said burner tube so that substantially two-thirds of a length of said venturi tube is located inside of said burner tube. 
   
   
       20 . A method as claimed in any one of  claims 17 ,  18  or  19  including the step of mounting said venturi tube and said burner tube concentrically relative to one another.