Patent ID: 7611563

Claim:
Multifunction injector ( 10 , 11 , 12 ) having a central axis, said injector comprising a De Laval nozzle ( 20 ) adapted to act as a burner at subsonic or supersonic speed, combined with a plurality of fuel nozzles ( 31 ) and an external ringa of comburant nozzles ( 32 ) respectively, arranged in two rings, concentric and coaxial to said De Laval nozzle ( 20 ) and externally protected by a specifically shaped protection cavity ( 40 ) wherein the external ring of comburant nozzles ( 32 ) has ducts ( 33 ) provided on a slope in relation to the central axis wherein said ducts ( 33 ) are arranged in a spiral form to cause a swirl rotation of oxidizing gases or fuels and the specifically shaped protection cavity ( 40 ) is conically shaped.