Patent ID: 6169264
Filing Date: 2001-01-02
Classification: H05H

Abstract:
Male/female assembly for a plasma torch comprising: a nozzle (1) forming the male portion and comprising at least one upstream portion (11a) having a diameter D1, at least one intermediate portion (11b) having a diameter D2 and at least one downstream portion (11c) having, immediately adjacent the intermediate portion (11b), a diameter D3, said intermediate portion (11b) being located between said upstream portion (11a) and downstream portion (11c), said diameters D1, D2 and D3 being such that D3>D1>D2, and a nozzle carrier (2) forming the female portion, which is adapted to receive said nozzle (1), said male/female assembly being characterized: in that the nozzle (1) comprises, over the external periphery of said upstream portion (11a), at least one helicoidal ramp (14) and at least one recess (15) extending over at least all the axial length (L) of said helicoidal ramp (14), and in that the nozzle carrier (2) comprises, over its internal peripheral surface and adjacent its downstream end (22c), at least one projection (21) adapted to coact with at least one helicoidal ramp (14) of the nozzle (1), so as to be able to ensure holding in position of the nozzle (1) in the nozzle carrier (2) by means of at least said projection (21) and at least said ramp (14), after securement by means of rotation of said nozzle (1) in said nozzle carrier (2).