Patent ID: 8701590

Claim:
A cold gas dynamic spraying apparatus which comprises: (a) a housing: (b) an inlet for a gas entrained powder: (c) an inlet for a gas; (d) a mixing cavity disposed within said housing for mixing of said powder and gas in communication with said inlets, said cavity having an exit therefrom; (e) a nozzle assembly including a nozzleholder having a nozzle collar which includes a bore centrally disposed therethrough, and said nozzle assembly further including a cooling jacket including a cooling media, and a non-metallic nozzle having an exterior surface, a central longitudinal axis and a centrally disposed bore therethrough; and (f) a nozzle having an exterior surface and a centrally disposed nozzle bore therethrough; (i) said nozzle bore having an internal passage defining a converging section extending partway therethrough from an inlet of the nozzle bore and a diverging section extending toward an outlet end of the nozzle bore, (ii) the nozzle bore inlet in communication with said mixing cavity exit, (iii) the nozzle collar forming a thermal mechanical interface with the exterior surface of the nozzle, where the interface is spaced apart from the converging section of the internal passage along the central longitudinal axis of the nozzle to allow the cooling media to be in thermal contact with the exterior surface of the nozzle corresponding to the converging section of the nozzle.