Electrostatic spray pistol

US4287552A · kind A · utility

Assignee

• J. WAGNER GmbH · DE

Inventors

• Josef Wagner · Augsburg, DE
• Willi Huber · Heerbrugg, CH

Key dates

• Filing date: Apr 23, 1979
• Grant date: Sep 1, 1981
• Expiry date: Apr 23, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05B5/0531
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An electrostatic hand-held spray gun with a body consisting of a barrel affixed at a selected angle to a handle. The barrel has a boring which terminates at an atomizer. The handle contains a boring which at a lower end terminates in a hose connection and at an upper end at a control valve. A second end of the barrel boring also terminates at the valve. The control valve is operable by a trigger rotatably affixed to the handle and controls the flow of color material through the boring in the barrel. A spray electrode is located adjacent the atomizer. A tubular trigger guard structure is located near the second end of the barrel in front of the trigger and is oriented at a selected angle with respect to the barrel. A high voltage cascade multiplier module and a step-up transformer module are removably mounted within the trigger guard. A low voltage cable brought into a lower end of the trigger guard provides power to drive the step-up transformer. The step-up transformer outputs an intermediate voltage, high frequency, signal to drive the high voltage multiplier circuitry. The output of the high voltage multiplier circuitry is connected by a conductor, through a current limiting res…