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:
May. 31, 2016
Filed:
Oct. 06, 2010
Yunzhi Gao, Saitama, JP;
Junichi Takahashi, Saitama, JP;
Gyo Muramatsu, Niigata, JP;
Ryo Obara, Niigata, JP;
Tetsuji Miyashita, Niigata, JP;
Tadahiko Watanabe, Niigata, JP;
Yunzhi Gao, Saitama, JP;
Junichi Takahashi, Saitama, JP;
Gyo Muramatsu, Niigata, JP;
Ryo Obara, Niigata, JP;
Tetsuji Miyashita, Niigata, JP;
Tadahiko Watanabe, Niigata, JP;
KABUSHIKI KAISHA RIKEN, Tokyo, JP;
Abstract
An oil ring for an internal combustion engine is provided that can prevent adhesion and deposition of oil sludge even during long-time operation of the engine, can thereby prevent the occurrence of sticking of the oil ring components to each other, and can maintain a good oil control function. At least part of the surface of the oil ring for an internal combustion engine is coated with a metal coating having a surface free energy of 40 mJ/mor less and a hydrogen bonding strength of 1.0 mJ/mor less. A coating of Ni, Cu, or an alloy containing Ni or Cu is used as the metal coating.