Patent ID: 8205807
Filing Date: 2012-06-26
Classification: B05B

Abstract:
1. An automatic spray gun for atomizing a product that is water-soluble or dissolved in a solvent, comprising: a body having a front part containing a chamber for the product to be atomized, and a back part for control and admission of a propellant gas; a cylindrical jacket, made of material resistant to abrasion, contained in said front part, said chamber for the product to be atomized being in an interior of the cylindrical jacket; an atomization head and a nozzle for discharge of the product controlled by a movable needle valve; means for controlling movement of the needle; and an elastic sealing means surrounding the needle valve and having an elongated tubular shape with an inner surface matched to a diameter of the needle, the elastic sealing means clamped against the back part of the body by the cylindrical jacket via a screwing engagement, the elastic sealing means so clamped being mounted between the front part and back part of the body, said inner surface being further matched to a diameter of a control slide, mounted on the needle valve for moving the needle valve, so that said elastic sealing means withstands a pressure of the product to be atomized, wherein a front end of the elastic sealing means is fixed so as to lock the elastic sealing means against a shoulder of the needle valve and to prestress the elastic sealing means in compression.