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:
Nov. 16, 1999
Filed:
Oct. 20, 1997
Hoang Van Ngo, Santa Ana, CA (US);
Raytheon Company, Lexington, MA (US);
Abstract
A rotary pump that may be used in manual or automatic dispensing systems to dispense material such as epoxy or solder paste, and the like. The rotary pump has a feed screw shaft with fins disposed in a mixing chamber that mixes the epoxy or solder paste. Epoxy or solder paste disposed in a container is forced by air pressure from the container through a feed shaft to the mixing chamber. The feed screw shaft and fins are driven by a motor that rotates the shaft and fins to blend the epoxy or solder paste in the mixing chamber. The epoxy or solder paste is forced out of a dispensing tip onto an article by the rotary motion of the feed screw shaft. Therefore, mixing of the epoxy or solder paste is achieved just prior to the point of application. The rotary pump keeps the epoxy or solder paste thoroughly blended before it is dispensed.