Modular plasma gun assembly for coating the inner surfaces of hollow spaces and cavities

A plasma gun assembly particularly for applying a coating to the inner surfaces of hollow spaces and cavities, comprising:

• a plasma gun head member;
• a plasma gun shaft member;
• a connector member adapted to be connected to means for supplying electric energy, to means for supplying a cooling medium and for removing the cooling medium therefrom, to means for supplying plasma gas, and to means for supplying coating material;
• first feeding means for conducting said electric energy from said connector member to said plasma gun head member, second feeding means for conducting said cooling medium from said connector member to said plasma gun head member and back to said connector member, third feeding means for conducting said plasma gas from said connector member to said plasma gun head member, and fourth feeding means for conducting said coating material from said connector member to said plasma gun head member;
• said connector member, said plasma gun shaft member and said plasma gun head member being connected to each other along a longitudinal axis, said axis constituting a longitudinal central axis of the plasma gun assembly;
• said connector member, said plasma gun shaft member and said plasma gun head member being designed as individually exchangeable modules which can be removed, exchanged and assembled by the operator of the plasma gun assembly;
• said first, second, third and fourth feeding means all being located and extending in the interiors of said connector member, of said plasma gun shaft member and of said plasma gun head member.