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:
Oct. 02, 2001
Filed:
Jun. 25, 1999
Applicant:
Inventors:
Yukio Tateishi, Yono, JP;
Motonobu Onoda, Yono, JP;
Katsuaki Ogawa, Yono, JP;
Kazuo Shimizu, Yono, JP;
Assignee:
Nippon Piston Ring Co., Ltd., Saitama-Ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/500 ;
U.S. Cl.
CPC ...
B32B 1/500 ;
Abstract
A laminated chromium plating layers providing improved wear resistance and fatigue strength for use in mechanical parts of an internal combustion engine. The lamination is formed on a base body and contains a plurality of high hardness chromium plating layer and a plurality of low hardness chromium plating layer, and each high hardness chromium plating layer is formed upon each low hardness chromium plating layer to provide the lamination of alternating high hardness chromium plating layer and low hardness chromium plating layer.