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:
Feb. 24, 2009
Filed:
Aug. 30, 2007
Iwao Hiraishi, Saitama, JP;
Katsuaki Ogawa, Saitama, JP;
Hiromi Ishikawa, Saitama, JP;
Tsugane Hirase, Saitama, JP;
Kazuhiro Sameshima, Saitama, JP;
Iwao Hiraishi, Saitama, JP;
Katsuaki Ogawa, Saitama, JP;
Hiromi Ishikawa, Saitama, JP;
Tsugane Hirase, Saitama, JP;
Kazuhiro Sameshima, Saitama, JP;
Nippon Piston Ring Co., Ltd., Saitama-Shi, JP;
Abstract
A combination of a cylinder liner and a piston ring, wherein the cylinder liner includes, silicon: 23.0-28.0% by weight, magnesium: 0.80-2.0% by weight, copper: 3.0-4.5% by weight, iron: 0.25% by weight or less, nickel: 0.01% by weight or less, wherein surface roughness profile of the inner circumference surface has Rz=0.5 to 1.0 μm, Rk=0.2 to 0.4 μm, Rpk=0.05 to 0.1 μm, Rvk=0.08 to 0.2 μm, wherein the piston ring includes carbon: 0.6-0.7% by weight, chrome: 13-14% by weight, molybdenum: 0.2-0.4% by weight, silicon: 0.25-0.50% by weight, manganese: 0.2-0.5% by weight, and wherein carbides with the diameter of 5.0 μm and less are 4-10%.