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:
Jun. 21, 2016
Filed:
Jun. 21, 2012
Takuma Sekiya, Kashiwazaki, JP;
Yuuichi Murayama, Kashiwazaki, JP;
Masayuki Sato, Kashiwazaki, JP;
Yuji Shima, Kashiwazaki, JP;
Junya Takahashi, Kashiwazaki, JP;
Masaki Moronuki, Kashiwazaki, JP;
Takuma Sekiya, Kashiwazaki, JP;
Yuuichi Murayama, Kashiwazaki, JP;
Masayuki Sato, Kashiwazaki, JP;
Yuji Shima, Kashiwazaki, JP;
Junya Takahashi, Kashiwazaki, JP;
Masaki Moronuki, Kashiwazaki, JP;
KABUSHIKI KAISHA RIKEN, Tokyo, JP;
Abstract
To provide a high-thermal-conductivity piston ring having excellent scuffing resistance and wear resistance, which can be used in a high-heat-load environment in engines, a TiN coating as thick as 10-60 μm, in which the texture coefficient of a (220) plane is 1.1-1.8 in X-ray diffraction on the coating surface, larger than those of (111) and (200) planes, is formed under the optimized ion plating conditions on a peripheral surface of the piston ring. Also, to obtain excellent sliding characteristics with low friction without losing excellent thermal conductivity of TiN, a hard amorphous carbon coating is formed on the TiN coating.