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:
Aug. 31, 1999
Filed:
Oct. 14, 1997
Applicant:
Inventor:
Katsuaki Fukushima, Shimane-ken, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
148325 ; 420 34 ; 420 67 ; 420104 ; 420105 ; 420110 ; 420111 ; 148333 ; 148334 ;
Abstract
Disclosed is a piston ring material excellent in workability, which consists essentially of, by weight, 0.4 to 1.0% of C, 5.0 to 25.0% of Cr, at least one of not more than 0.25% Si and not more than 0.30% Mn, and balance of Fe and impurities. The material may optionally contain one or more elements of Mo, W, V and Nb in place of a part of Fe.