Patent ID: 9168546
Filing Date: 2015-10-27
Classification: B05B,C23C

Abstract:
1. A system for cold gas dynamic spraying of particulate material, the system comprising: (a) a nozzle having (b) one or more non-combustion sources of pressurized working gas in fluid communication with the working gas inlet; (c) one or more sources of the particulate material in particle flow communication with the two or more particle inlets; and, (d) a sink coupled between the one or more particulate material sources and the two or more particle inlets for clearing the two or more particle inlets of residual particulate material when the system is not spraying the particulate material out the nozzle, the sink operable to reduce a pressure in a chamber that is selectively coupled to the two or more particle inlets between the two or more particle inlets and the one or more particulate material sources, so that the pressure in the chamber becomes lower than that of the particle flow communication to draw the residual particulate material into the chamber; wherein the sink comprises a valve for controlling communication between the two or more particle inlets and the chamber, and wherein the chamber is connected to an exhaust port through which the particles drawn out of the particle inlets are expelled.