Patent ID: 7631816

Claim:
A cold spraying installation, comprising: a powder container; a high-pressure gas generator that generates a high-pressure gas; a gas heater; a nozzle that emits a cold gas particle stream, and a plurality of influencing devices that result in a variable change in a property of the cold gas particle stream selected from the group consisting of: temperature, pressure, particle density, particle material, and velocity, wherein the influencing devices periodically or aperiodically adjust the property of the cold gas particle stream, and wherein the influencing devices are: a powder injector where the powder from the powder container is provided to the high-pressure gas in a pulsed manner where the particle density of the cold gas particle stream can be varied, a pulsed heating device where a high-pressure gas can be variably heated resulting in adjustment of the temperature of the cold gas particle stream, a rotating perforated disk valve arranged upstream of a nozzle inlet opening to adjust the particle density of the cold gas particle stream, a piezo-electric pressure generator that adjusts a cross section of the nozzle, an ultrasonic acoustic wave generator that compresses or expands the cold gas particle stream, or a high-pressure valve in the high-pressure gas generator or in a line of the high-pressure gas generator that variably interrupts the flow of the high-pressure gas out of the high-pressure gas generator to adjust the pressure in the cold gas particle stream.