Oven or Grill Burner

Abstract

The invention relates to an oven or grill burner composed of a flat body delimiting an inner chamber and having fastening protrusions, wherein fastening members are composed of at least a tab made of one piece with a flat body wall or walls. In one embodiment, the burner of the present invention includes mountings for fastening a thermocouple and/or igniter and/or a venturi tube that supplies an air and gas mixture, all included as integral members of the burner. The burner of the present invention is shaped such to increase the even distribution of the air/gas mixture to outlet holes and further includes such constructive characteristics that provide for a reduction in the thickness of the metal sheet used for making the burner without compromising burner strength.

1 . An oven or grill burner comprising:
 a box body delimiting an inner chamber having an upper and a lower walls, and   a fastening protrusion comprising a fastening tab that extends from the box body and that is made of one piece with one or more of the upper or lower walls of the box body.   
   
   
       2 . The burner according to  claim 1 , wherein the fastening tab is provided in a position substantially coinciding with at least a part of two opposite walls of the box body. 
   
   
       3 . The burner according to  claim 1 , wherein the fastening tab is provided coinciding with a through aperture made in the box body. 
   
   
       4 . The burner according to  claim 2 , wherein the fastening tab is provided in a position coinciding with at last a part of the upper and lower walls of the box body. 
   
   
       5 . The burner according to  claim 2 , wherein the fastening tab includes an inclined portion extending from the box body and an ending fastening portion f extending from the inclined portion, and wherein the ending portion is substantially parallel to the opposite walls of the box body. 
   
   
       6 . The burner according to  claim 3 , further comprising a fuel and comburent mixture inlet end, wherein the fuel and comburent mixture inlet end is shaped as a venturi tube and is integrated as one piece with the box body. 
   
   
       7 . The burner according to  claim 6 , wherein the fastening tab is provided in an area of the burner opposite to the fuel and comburent mixture inlet end. 
   
   
       8 . The burner according to  claim 6 , wherein the aperture coinciding with the fastening tab is closed along all perimetral edges. 
   
   
       9 . The burner according to  claim 6 , wherein the box body comprises a first and a second half shells separated along a plane substantially parallel to the upper and/or the lower walls of the box body, and wherein the first and second half shells are tightly secured together by mechanically bending and pressing perimetral continuous flanges along outer perimetral edges of the two half shells and along perimetral edges of the aperture. 
   
   
       10 . The burner according to  claim 9 , wherein each of the first and second half shells has an aperture which provides the through aperture and into which a tab extends, wherein the apertures and the tabs of the first and second half shells are coincident, wherein the tabs in the first and second half shells are tightly secured by pressing and/or bending perimetral flanges, and wherein the pressing and/or bending provides the fastening tab of the burner. 
   
   
       11 . The burner according to  claim 9 , wherein the outer perimetral flange of the first half shell provides an outer side and a base wall of a perimetral channel that extends without interruption along the longitudinal sides of the burner and also along a head end of the burner opposite to the fuel/comburent mixture inlet end, and wherein the second half shell has a first row of fuel/comburent mixture outlet holes provided along a perimetral band of said second half shell, and wherein the perimetral band delimits the perimetral channel on an inner side. 
   
   
       12 . The burner according to  claim 11 , wherein the first row of holes extends along the perimetral channel inclusive of the head end of the burner opposite to the fuel/comburent mixture inlet end. 
   
   
       13 . The burner according to  claim 11 , wherein a second row of fuel/comburent mixture outlet holes supplies a flame. 
   
   
       14 . The burner according to  claim 13 , wherein the second row of fuel/comburent mixture outlet holes is provided along a side wall of the second half shell beside the first row of holes and is positioned between the first row and the lower wall. 
   
   
       15 . The burner according to  claim 13 , wherein the holes of the first row have a diameter smaller than the holes of the second row. 
   
   
       16 . The burner according to  claim 11 , wherein at the fuel/comburent mixture inlet end the first and the second half shells are shaped such to each form a half of the venturi tube according to a diametral plane of said venturi tube, and wherein side edges of the two halves of the venturi tube are shaped to provide a tight contact one against the other. 
   
   
       17 . The burner according to  claim 11 , wherein a reflecting shield member is fastenable to the upper or the lower wall of the box body, wherein the reflecting shield has a central wall abutting and fastenable to the upper or the lower wall of the burner, and wherein an aperture is provided in the reflecting shield coinciding with the aperture provided in the burner body for the fastening tab. 
   
   
       18 . The burner according to  claim 11 , wherein the box body of the burner is shaped such to provide a perimetral U-shaped chamber extending for a predetermined length of the longitudinal sides of the box body and along the head end, wherein the perimetral U-shaped chamber delimits an intermediate chamber for flow communication between longitudinal stems of the perimetral U-shaped chamber, and wherein the intermediate chamber has an inner height lower than an inner height of the perimetral U-shaped chamber. 
   
   
       19 . The burner according to  claim 18 , wherein the venturi tube extends inside the box body between the longitudinal stems of the perimetral U-shaped chamber. 
   
   
       20 . The burner according to  claim 11 , wherein one of the upper or lower wall of the burner is substantially flat while the opposite wall has a central depression surrounded by a perimetral swelling along the longitudinal sides and along the head end, wherein the upper and lower walls extend towards the end of the box body corresponding to the fuel and carburent inlet end and each comprises a central swelling having an essentially semi-conical shape to provide a longitudinal half of the venturi tube. 
   
   
       21 . The burner according to  claim 9 , wherein the first and the second half shells are manufactured by shaping and cutting a metal sheet blank. 
   
   
       22 . An oven or grill burner comprising:
 a box body delimiting an inner chamber; and having an upper and a lower walls; and   a reflecting shield fastenable to the upper or the lower wall of the box body,   wherein the box body is provided with a plurality of through openings passing through the upper and the lower walls,   wherein the reflecting shield is provided with a central portion shaped correspondingly to a shape of the upper and/or lower walls and is further provided with fastening tabs each coinciding with one of the through openings, and   wherein the fastening extensions have such a length to project outwardly beyond the side of the box body opposite to the reflecting shield, thereby forming a fastening end bendable against the box body.   
   
   
       23 . The burner according to  claim 22 , wherein the through openings are provided at recesses contacting the upper wall with the lower wall, and wherein the upper wall and the lower wall of the box body are tightly connected along edges delimiting said through openings. 
   
   
       24 . The burner according to  claim 23 , wherein the edges delimiting the through openings in the upper wall and in the lower wall of the box body are provided with flanges for tight connection by bending and by pressing. 
   
   
       25 . The burner according to  claim 23 , wherein the recesses contacting the upper wall with the lower wall are configured to form spacers between said two walls. 
   
   
       26 . The burner according to  claim 23 , further comprising a fastening protrusion that includes a fastening tab made of one piece with one or more of the upper or lower wall of the box body. 
   
   
       27 . The burner according to  claim 26 , wherein the central part of the reflecting shield is shaped to substantially mate a corresponding portion of the upper or lower wall of the burner. 
   
   
       28 . The burner according to  claim 27 , wherein the upper or lower wall includes a central depression, and wherein the reflecting shield in a position coinciding with said depression has a correspondingly shaped projection intended to engage in said depression by a shape fit. 
   
   
       29 . An oven or grill burner comprising:
 a box body delimiting an inner chamber; and   one or more of an igniter or a flame detecting thermocouple coupled to said box body by one or more mountings,   wherein said one or more mountings are made of one piece with the box body.   
   
   
       30 . The burner according to  claim 29 , wherein said one or more mountings are composed of an arm-like extension projecting outwardly beyond a side edge of the box body at least at a side thereof, wherein the one or more mountings are configured for removably fastening the igniter and/or the thermocouple, and wherein the thermocouple and/or the igniter are supported at a limited intermediate portion of their lengths. 
   
   
       31 . The burner according to  claim 29 , wherein the one or more mountings are oriented such to retain the igniter and/or the thermocouple in a proper operating position with respect to the burner. 
   
   
       32 . The burner according to  claim 29 , wherein the igniter and/or the thermocouple are adjustable axially after coupling with the one or more mountings. 
   
   
       33 . The burner according to  claim 29 , wherein said one or more mountings comprise two supporting arms each branching out from a side edge of the box body, wherein one of the supporting arm is coupled to the igniter and the other supporting arm is coupled to the flame detecting thermocouple, and wherein the two arms are made of one piece with the box body. 
   
   
       34 . The burner according to  claim 33 , wherein the two supporting arms are provided at an end of the box body corresponding to a fuel/comburent mixture inlet end. 
   
   
       35 . The burner according to  claim 29 ,
 wherein the box body comprises an upper and a lower walls,   wherein a reflecting shield is fastenable to the upper or the lower wall of the box body,   wherein the box body is provided with a plurality of through openings passing through the upper and the lower walls,   wherein the reflecting shield is provided with a central portion shaped correspondingly to a shape of the upper and/or lower walls and is further provided with fastening tabs each coinciding with one of the through openings, and   wherein the fastening extensions have such a length to project outwardly beyond the side of the box body opposite to the reflecting shield, thereby forming a fastening end bendable against the box body.   
   
   
       36 . The burner according to  claim 29 ,
 wherein the box body comprises an upper wall and a lower walls, and   wherein a fastening protrusion comprises a fastening tab that extends from the box body and that is made of one piece with one or more of the upper or lower walls of the box body.   
   
   
       37 . An oven or grill burner comprising:
 a box body delimiting an inner chamber and having an upper and a lower walls,   wherein the upper and the lower walls are configured to form therebetween a peripheral U-shaped chamber distributing a gas and air mixture along longitudinal sides of the box body and further along a head side opposite to a gas and air mixture inlet end, and   wherein the peripheral U-shaped chamber surrounds an intermediate narrowing chamber having a height smaller than a height of the peripheral U-shaped chamber.   
   
   
       38 . The burner according to  claim 37 , wherein a venturi tube is disposed at the gas and air mixture inlet end and is integral therewith, wherein the venturi tube is closed for an initial portion situated towards the narrowing chamber, and wherein the venturi tube is in flow communication with the narrowing chamber that is disposed centrally and is in flow communication with longitudinal stems of the peripheral U-shaped chamber. 
   
   
       39 . The burner according to  claim 38 , wherein the narrowing chamber comprises transverse spacing members connecting the upper and the lower walls. 
   
   
       40 . The burner according to  claim 37 ,
 wherein a fastening protrusion comprising a fastening tab extends from the box body and is made of one piece with one or more of the upper or lower walls of the box body,   wherein the fastening tab extends over a through aperture made in the box body,   wherein a reflecting shield is fastenable to the upper or the lower wall of the box body,   wherein the box body is provided with a plurality of through openings passing through the upper and the lower walls,   wherein the reflecting shield is provided with a central portion shaped correspondingly to a shape of the upper and/or lower walls and is further provided with fastening extensions each coinciding with one of the through openings,   wherein the fastening extensions have such a length to project outwardly beyond the side of the box body opposite to the reflecting shield, thereby forming a fastening end bendable against the box body,   wherein one or more of an igniter or a flame detecting thermocouple is coupled to the box body by one or more mountings, and   wherein the one or more mountings are made of one piece with the box body.   
   
   
       41 . The burner according to  claim 40 , wherein a perimetral edge of the through aperture is provided at a certain distance from the venturi tube and deviates sideways the flow of the gas and air mixture. 
   
   
       42 . The burner according to  claim 38 , wherein the venturi tube extends for a certain length inside the narrowing chamber and is in flow communication with the narrowing chamber through side apertures.