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:
May. 19, 1998
Filed:
Nov. 30, 1994
Applicant:
Inventor:
Gerald W Crum, Elyria, OH (US);
Assignee:
Nordson Corporation, Westlake, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
406 29 ; 406109 ; 406128 ; 406143 ;
Abstract
An apparatus and method for pumping a constant volume of powder to a powder spray gun includes a powder pump which meters the powder into a stream of air so that a constant volume of the air entrained powder is distributed to the spray gun. The invention also discloses a pressure equalizing system that prevents powder leakage across a powder metering system that meters powder from a reservoir into an outlet tube carrying the constant velocity stream of air. A control system is disclosed which adjusts the rate at which powder is metered into the outlet tube so that the mass flow of powder exiting the outlet tube remains constant.