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:
Apr. 24, 2001
Filed:
Mar. 29, 2000
Applicant:
Inventors:
Assignee:
Nippon Piston Ring Co., Ltd., Saitama-Ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02F 1/00 ; B24B 3/302 ;
U.S. Cl.
CPC ...
F02F 1/00 ; B24B 3/302 ;
Abstract
A cylinder liner formed of a cast iron and having an inner peripheral surface subjected to honing which forms cross-hatching grooves on the surface. A resultant surface roughness ranges from 0.4 &mgr;mR,to 0.8 &mgr;mR,, and an open phase rate of graphite is not less than 80% at the inner peripheral surface.