Safety device for a plasma torch
First Claim
1. A plasma torch comprising:
- a torch head including at least one nozzle holder and a nozzle, the nozzle being fixed to the nozzle holder by fixing means;
safety electrical switch means for controlling the supply of electric current to said torch head; and
a removable protective shroud surrounding at least a part of the torch head, said protective shroud including;
at least one actuating means structured and arranged to interact with the safety electrical switch means in order to make it possible to supply the torch head with electric current; and
retaining means structured and arranged to interact with at least the nozzle so as to allow the protective shroud to be integrated with at least the nozzle.
1 Assignment
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Accused Products
Abstract
Plasma torch (1) equipped with a torch head (1'"'"') including a nozzle holder (10) and a nozzle (4), the nozzle (4) being fixed to the nozzle holder (10) by the use of fixing elements (14). Safety electrical switch unit (3) controls the electric current supplied to the torch head (1'"'"'). A removable protective shroud (5) surrounds the torch head (1'"'"') and comprises, on the one hand, at least one actuating element (6) capable of interacting with the safety electrical switch unit (3) in order to make it possible to supply electric current to the torch head (1'"'"') and, on the other hand, retaining elements comprising a spring clip (8) capable of interacting with a circular groove of the nozzle (4) to allow the protective shroud (5) to be integrated with the nozzle (4). Such a plasma torch is useful for welding or cutting a piece of metal.
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Citations
14 Claims
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1. A plasma torch comprising:
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a torch head including at least one nozzle holder and a nozzle, the nozzle being fixed to the nozzle holder by fixing means; safety electrical switch means for controlling the supply of electric current to said torch head; and a removable protective shroud surrounding at least a part of the torch head, said protective shroud including; at least one actuating means structured and arranged to interact with the safety electrical switch means in order to make it possible to supply the torch head with electric current; and retaining means structured and arranged to interact with at least the nozzle so as to allow the protective shroud to be integrated with at least the nozzle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Method of plasma-arc welding or cutting, which comprises
providing a plasma torch comprising: -
a torch head including at least one nozzle holder and a nozzle, the nozzle being fixed to the nozzle holder by fixing means; safety electrical switch means for, controlling the supply of electric current to said torch head; and a removable protective shroud surrounding at least a part of the torch head, said protective shroud including; at least one actuating means structured and and arranged to interact with the safety electrical switch means in order to make it possible to supply the torch head with electric current; and retaining means structured and arranged to interact with at least the nozzle so as to allow the protective shroud to be integrated with at least the nozzle; and using said plasma torch to weld or cut.
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14. Method of assembling a manual plasma torch comprising:
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a torch head including at least one nozzle holder and a nozzle, the nozzle being fixed to the nozzle holder by fixing means; safety electrical switch means for controlling the supply of electric current to said torch head; and a removable protective shroud surrounding at least a part of the torch head, said protective shroud including; at least one actuating means structured and arranged to interact with the safety electrical switch means in order to make it possible to supply the torch head with electric current; and retaining means structured and arranged to interact with at least the nozzle so as to allow the protective shroud to be integrated with at least nozzle, the method comprising the following sequential steps; a) positioning and fixing the nozzle in the nozzle holder with the fixing means; b) positioning and fixing the protective shroud onto the torch head, such that; the actuating means carried by the shroud interact with the safety electrical switch means in order to allow the torch head to be supplied with electric current; and the retaining means for retaining the protective shroud interact with the nozzle in order to fix and hold the protective shroud on at least the nozzle.
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Specification