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:
Sep. 17, 2019
Filed:
Jan. 12, 2016
Applicant:
Kabushiki Kaisha Riken, Chiyoda-ku, Tokyo, JP;
Inventor:
Masaaki Fujita, Kashiwazaki, JP;
Assignee:
KABUSHIKI KAISHA RIKEN, Chiyoda-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/20 (2006.01); F02F 5/00 (2006.01); F16J 9/26 (2006.01); F16J 9/14 (2006.01);
U.S. Cl.
CPC ...
F16J 9/206 (2013.01); F02F 5/00 (2013.01); F16J 9/20 (2013.01); F16J 9/26 (2013.01); F16J 9/14 (2013.01);
Abstract
A piston ring includes an annular main bodyhaving a side surfaceand a side surface, and an inner peripheral surfaceand an outer peripheral surface, wherein in the main body, a cutout sectionis provided in a corner sectionformed by the side surfaceand the outer peripheral surface. The cutout sectionhas a first surfaceand a second surface. An angle θformed by the first surfaceand the side surfaceis an obtuse angle, and a corner sectionformed by the second surfaceand the outer peripheral surfaceis located between the side surfaceand the side surfacein a width direction of the main body