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:
Jul. 09, 2019
Filed:
Sep. 08, 2014
Nippon Piston Ring Co., Ltd., Saitama-shi, Saitama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Tsugane Hirase, Ichinoseki, JP;
Hiromichi Yokokawa, Utsunomiya, JP;
Kazuhiro Fujimura, Kuki, JP;
Junpei Ogawa, Tokyo, JP;
Takaaki Kondo, Yokohama, JP;
Tomonori Miyazawa, Chigasaki, JP;
Toyoki Iguchi, Yokohama, JP;
Takuma Suzuki, Kawasaki, JP;
NIPPON PISTON RING CO., LTD., Saitama-shi, Saitama, JP;
NISSAN MOTOR CO., LTD., Yokohama-shi, Kanagawa, JP;
Abstract
There is provided a highly heat conductive piston ring for an internal combustion engine capable of exhibiting a gas seal function and a heat transfer function for a long period of time in a stable manner when used in an automobile gasoline engine having a high compression ratio. The highly heat conductive piston ring for an internal combustion engine is a piston ring for an internal combustion engine having an Mn—Cr steel as a base material, the Mn—Cr steel including C in the range of from 0.52 to 0.65 mass %, Si in the range of from 0.15 to 0.35 mass %, Mn in the range of from 0.60 to 1.00 mass %, Cr in the range of from 0.60 to 1.00 mass %, P in the range of 0.04 mass % or less, S in the range of 0.04 mass % or less, a slight amount of components (total content of Al, Ni, and Cu) in the range of from 0.05 to 3.0 mass %, and a remnant being Fe and unavoidable impurities.