Fluid sprinkling – spraying – and diffusing – Weather control
Patent
1975-09-02
1976-06-22
Ward, Jr., Robert S.
Fluid sprinkling, spraying, and diffusing
Weather control
239105, B05B 502, B05B 128
Patent
active
039646831
ABSTRACT:
An improved electrostatic spray gun for the deposition of powdered coating material on a workpiece is disclosed. The spray gun includes a housing having a barrel to which a nozzle is attached for directing the powdered material to the workpiece. A charging electrode, which is connected to a high voltage power supply, is mounted on a diffuser assembly which is clamped between the nozzle and the housing, on which the nozzle is threaded. A regulated gas flow supplied through the housing and the diffuser assembly provides a gas shield around the charging electrode to prevent a buildup of the coating material on the electrode. A novel pneumatic safety interlock continuously monitors the pressure of the gas supplied to the diffuser assembly. The interlock turns off the high voltage power supply and a pump for the coating material in response to a drop in such pressure resulting from a loose nozzle.
REFERENCES:
patent: 2916576 (1959-12-01), Croskey et al.
patent: 3691991 (1972-09-01), Luderer et al.
patent: 3740612 (1973-06-01), Gauthier et al.
patent: 3746254 (1973-07-01), Duncan et al.
Champion Spark Plug Company
Todd, Jr. Oliver E.
Ward, Jr. Robert S.
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