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:
Mar. 27, 2001
Filed:
Oct. 15, 1998
Herman E. Turner, Jr., Wellington, OH (US);
Mario Romanin, Grafton, OH (US);
Nordson Corporation, Westlake, OH (US);
Abstract
A gear pump for metering resins is provided having the surfaces of interacting internal metal parts coated with a metal-based material to prevent seizing of the interacting moving parts as a result of resin curing therebetween. Parts made from such materials as heat treated carbon steel and stainless steel are preferably coated with a nitride, carbide or oxide of such metals as tungsten, titanium, aluminum and chromium at a thickness of between about 2-5 microns. The coating is applied to the surface of any part that comes in heated contact with the surface of another relatively moving part. The resulting gear pump exhibits high wear resistance, longevity, and low maintenance requirements.