Patent ID: 8052071
Filing Date: 2011-11-08
Classification: B05B,Y10S

Abstract:
1. A fluid reservoir for a paint spray gun, said reservoir comprising a cup shaped receptacle having a first central axis for holding paint to be gravity fed into a paint spray gun, a cover that is attached to and closes the receptacle and a conical bottom that is attached to an outlet spout having a second central axis through which paint in said receptacle can flow by gravity into a paint spray gun, said outlet spout being integrally molded as part of the reservoir and serves for fixing the fluid reservoir on a paint spray gun to enable paint in said receptacle to flow by gravity through said outlet spout into said paint spray gun, said outlet spout composed of a tubular connection piece of preselected wall thickness that includes a hollow cylindrical front area, an adjacent external thread for being screwed into an internal thread on an inlet port of a paint spray gun, a screw-type wedge above the external thread for rapid coupling to a paint spray gun and an upper insert area with an annular contact surface to receive a filter, and wherein the screw type wedge is formed by a wedge shaped projection with a wedge surface that extends over approximately half the circumference of the outlet spout for engagement with a corresponding mating surface on a paint spray gun; a flexible transition area composed of an elastic non-embrittled plastic material having a high PE content formed at the conical bottom of the reservoir where it joins with the outlet spout to provide flexibility in order to enable adjustment of the inclination of the first central axis of the receptacle of the reservoir relative to the second central axis of the outlet spout of the reservoir so that the reservoir can be maintained in a vertical orientation, said transition area being characterized by a radius to insure that the transition area is not damaged when the outlet spout is operatively fixed in a paint spray gun to enable gravity flow of reservoir content into the paint spray gun and the reservoir is inclined relative to the outlet spout so that the first central axis of the receptacle of the reservoir can be maintained vertical regardless of the inclination of the second central axis of the outlet spout of the reservoir, said transition area having a wall thickness that is at least 30% less than the preselected wall thickness of the outlet spout whereby during gravity feed of paint from the receptacle to a paint spray gun, the receptacle can be placed stably at a vertical orientation with respect to the second central axis of the outlet spout and thereby assure continuous gravity feed of paint into the paint spray gun regardless of the paint spray gun's orientation and thus allows for uninterrupted operation of the paint spray gun.