Patent ID: 7557324

Claim:
A thermal spraying device comprising: a flame-generating means ( 1 , 2 ) for generating a flame and an injection means ( 3 ) for injecting a powder into the generated flame; said flame-generating means ( 1 , 2 ) comprising an end piece ( 1 ) out of which the flame is directed towards a substrate to be subjected to spraying; and said powder-injection means ( 3 ) comprising a frame element ( 6 ) that projects in the flame ejection direction beyond the end piece ( 1 ); wherein the frame element ( 6 ) at least partly surrounds a flame zone extending from the end piece ( 1 ) and has 1) a plurality of radially oriented open through holes ( 9 ) extending through the frame element ( 6 ) from an outer surface thereof to an inner surface thereof and distributed circumferentially about the frame element ( 6 ); and 2) two or more radially inwardly oriented powder injection ports distributed about the frame element ( 6 ).