Patent ID: 8753112

Claim:
Gas burner provided with a plurality of concentric and substantially circular flame crowns comprising: a burner body ( 1 ) adapted to be mounted on a surface of a cooking plate ( 40 ); a first central burner ( 6 ) adapted to supply a first peripheral flame ring; a second outer annular burner ( 8 ) surrounding said first central burner at a defined distance and adapted to supply at least a respective second peripheral flame ring; a first gas inlet ( 11 ) in communication with said burner body; a first gas injector ( 12 ), adapted to inject a gas flow into a respective first Venturi pipe ( 23 ) which conveys an air-gas mixture to said first central burner ( 6 ); said first central burner comprising a first diffusion chamber for the diffusion of the air/gas mixture, a plurality of ports to let said mixture out, and wherein a top of said first central burner is closed by a first cover ( 4 ); a second gas inlet ( 13 ) in communication with said burner body; wherein said second outer annular burner ( 8 ) comprises two separate outer diffusion chambers ( 21 , 22 ) for the diffusion of said mixture, wherein a top of said second outer annular burner is closed by a second cover ( 3 ), and wherein said second gas inlet ( 13 ) is in communication with said two separate outer diffusion chambers ( 21 , 22 ), which are not in communication to each other, through injection and conveying means comprising: two distinct outer injectors ( 15 , 16 ) in communication with said second gas inlet ( 13 ), and placed on a same end position ( 14 ) of said second gas inlet ( 13 ) and reciprocally separated from each other, and also in a lower portion and substantially in a side portion of said burner body ( 1 ); two respective outer Venturi pipes which are substantially horizontally oriented ( 17 , 18 ), each adapted to supply said air/gas mixture to a respective one of said two outer diffusion chambers ( 21 , 22 ), wherein said first gas injector ( 12 ) and said respective first Venturi pipe ( 23 ) for the central burner ( 6 ) are substantially horizontally oriented ( 23 ), wherein said two outer Venturi pipes ( 17 , 18 ) connect into two respective outer curved chambers ( 17 A, 18 A) comprising two respective outer vertical gas passages ( 19 , 20 ) connecting said outer curved chambers to said respective outer diffusion chambers ( 21 , 22 ), wherein said outer Venturi pipes ( 17 , 18 ) connect into said respective outer curved chambers ( 17 A, 18 A) on respective portions which are closer to said respective outer injectors ( 15 , 16 ).