Patent ID: 8389888

Claim:
A plasma torch comprising: a plasma generator having: a cathode extending along an axis X, an anode, and a chamber, the cathode and the anode being placed so as to be able to generate an electric arc in the chamber when voltage is applied between the anode and the cathode; and an injection device for injecting a plasmagen gas, the injection device comprising an injection duct opening, along an injection axis (I i ), via an injection orifice, into the chamber; means for injecting a material to be sprayed into a plasma flux generated by said plasma generator; wherein, a ratio R″ between: a radial distance (y i ) of said injection orifice, defined as a minimum distance between the axis X and a center of said injection orifice; and a largest transverse dimension (D C ) of the cathode in a region of the chamber downstream of an axial position p AC , p AC denoting the axial position of minimum radial distance between the anode and cathode, is smaller than 2.5, and a projection of the injection axis (I i ) in a transverse plane passing through the center of the injection orifice of said injection duct defines an angle β smaller than 45° with a radius lying in said transverse plane and passing through the axis X and through the center of said injection orifice.