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. 28, 2024
Filed:
Mar. 04, 2022
Applicant:
Kabushiki Kaisha Riken, Tokyo, JP;
Inventors:
Hiroyuki Yabune, Kashiwazaki, JP;
Yoshiyuki Hirade, Kashiwazaki, JP;
Kentaro Miyagawa, Kashiwazaki, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/20 (2006.01);
U.S. Cl.
CPC ...
F16J 9/20 (2013.01);
Abstract
A side rail forms an oil control ring together with a spacer expander, and includes: an outer peripheral surface; an inner peripheral surface having a vertically symmetrical shape in an axial cross section; a first side surface; and a second side surface. The inner peripheral surface includes an inner tip portion satisfying following Condition 1 in an axial cross section.0.7≤1/0≤1.1 Condition 1: In the expression, R1 represents a curvature radius (unit: mm) of a curve forming the inner tip portion, and h0 represents a height (unit: mm) of the side rail.