Brian S Gorrell

US Patent:

6522039, Feb 18, 2003

Filed:

Dec 13, 1996

Appl. No.:

08/764576

Inventors:

James P. Baltz - Waterville OH
Gene P. Altenburger - Maumee OH
Brian E. Gorrell - Angola IN
Varce E. Howe - Zionsville IN
Richard P. Bolger - Schaumburg IL

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

H02K 5136

US Classification:

310 88, 239690, 290 54, 310 89

Abstract:

A remote low voltage power source for electrostatic paint applicators used in hazardous locations. A low voltage generator and voltage conditioning and regulating circuitry are mounted in a small explosion proof housing. A generator shaft and a shaft on a voltage level adjusting potentiometer extend through and projects from the housing. The flamepath and the flame gap for the shafts meet explosion proof standards while permitting shaft rotation. An air driven turbine is mounted on the exterior of the housing and is connected to the projecting generator shaft to drive the generator. The low voltage is applied to a spray gun which includes circuitry for increasing the voltage to a high level for electrostatic charging sprayed paint.