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:
Sep. 26, 1995
Filed:
Nov. 06, 1989
Edward E Keller, San Diego, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
An improved high volume/low pressure spray gun for spraying liquids such as paint. The spray gun includes a nozzle for mixing a liquid, such as paint in a solvent carrier, with a higher-than-atmospheric pressure gas, such as compressed air, and projecting the mixture towards the surface to be coated. The liquid is conveyed to the nozzle through a tube. A valve, ordinarily operated by a manual trigger, turns liquid flow on or off. Compressed air is conveyed through a hose to a vortex tube, then from the vortex tube to the nozzle. The vortex tube receives compressed gas at a selected temperature, ordinarily room temperature, and divides it into a high volume warm stream sent to the nozzle and a cool stream which is ordinarily exhausted to the atmosphere. The resulting high volume, low pressure, warm propellant air produces improved painting quality with less overspray.