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:
Nov. 15, 2022
Filed:
Jul. 23, 2019
Applicants:
Tpr Co., Ltd., Tokyo, JP;
Tpr Industry Co., Ltd., Sagae, JP;
Inventors:
Assignees:
TPR CO., LTD., Tokyo, JP;
TPR INDUSTRY CO., LTD., Yamagata, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B24B 33/02 (2006.01); F02F 1/00 (2006.01); C22C 33/08 (2006.01); C22C 37/00 (2006.01); F02F 1/20 (2006.01);
U.S. Cl.
CPC ...
F02F 1/004 (2013.01); B24B 33/02 (2013.01); C22C 33/08 (2013.01); C22C 37/00 (2013.01); F02F 1/20 (2013.01);
Abstract
A cylinder liner of the present invention is a cylinder liner mounted on a cylinder block and formed of flaky graphite cast iron, at least a nitrided layer is provided on an inner periphery of the cylinder liner, and a cross hatching section is formed on the inner periphery, a roughness curve of the inner periphery has a plateau honing shape, a ten-point average roughness Rz of the inner periphery pursuant to JIS B0601:1982 is 4.0 μm or less, and an average value of an area ratio of pits generated in the inner periphery is 8% or less.