Electrostatic powder spray gun nozzle

Fluid sprinkling – spraying – and diffusing – Electrostatic type – Fixed member deflects exiting material

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239704, 239290, 239590, B05B 504

Patent

active

043803202

ABSTRACT:
A nozzle assembly for an electrostatic powder spray gun is disclosed. The powder spray gun includes an electrically non-conductive barrel through which a high voltage electrical path passes. The nozzle assembly is mounted in the open forward end of the barrel and includes a sleeve located on the center axis of the barrel for directing a flow of a pressurized gas, e.g., air, through the center of the nozzle assembly, a nozzle surrounding the sleeve defining an annular flow path for powder spray coating material encircling the flow of pressurized air and an air deflector cap for directing the pressurized air radially outwardly and into the flow of powder spray coating material being emitted from the nozzle. The air impacts the powder coating material to form a conical spray pattern of coating material. The gun also includes an electrode extending out of the nozzle assembly for electrostatically charging the powder. The nozzle assembly eliminates mechanical powder deflectors and the problems attendant therewith.

REFERENCES:
patent: 3448925 (1969-06-01), Cross
patent: 3659151 (1972-04-01), Fabre
patent: 3667675 (1972-06-01), Sherman et al.
patent: 3688990 (1972-09-01), Liedberg
patent: 3740612 (1973-06-01), Gauthier
patent: 3819115 (1974-06-01), Soderman
Technical Publication 31-4-0, "Manual 31-4, Electrostatic Powder Spray Hand Gun, Model NPE-2M " , Nordson Corporation.

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