The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 1981
Filed:
Mar. 15, 1979
Giuseppe De Fusco, St. Gall, CH;
Gema AG Apparatebau, St. Gall, CH;
Abstract
An electrostatic spray gun having an installed high-voltage generator, connected at its low-voltage side with an installed switch element for turning-on and turning-off the high-voltage generator. The spray gun further is provided with a flow channel for an atomizing gas, the flow channel being connected with a pressure line. A manually-operated closure valve is arranged in the flow channel. The switch element is structured as a flow-actuated or flow switch and is arranged in the flow channel and its movable contact is coupled with a closure element of a differential pressure valve arranged in the flow channel. In this way it is possible to only then turn-on the high-voltage generator when the atomizing gas flows in an undisturbed fashion through the flow channel. Disturbances in the flow of the atomizing gas, whether such be due to clogging of the nozzle at the spray gun, or due to a malfunction of the pressure source of the atomizing gas, thus automatically turn-off the high-voltage generator.