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:
Oct. 01, 2019
Filed:
Mar. 03, 2016
Kabushiki Kaisha Riken, Chiyoda-ku, Tokyo, JP;
Yuichiro Takezawa, Tokyo, JP;
Tatsuya Miyajima, Tokyo, JP;
KABUSHIKI KAISHA RIKEN, Chiyoda-ku, Tokyo, JP;
Abstract
A side rail () is formed in a sprit ring shape with an opening () and to be mounted on a space expander () in an annular shape to constitute, together with the space expander (), a multi-piece oil ring () used in an internal combustion engine. The side rail () includes an outer peripheral surface () facing radially outward, an inner peripheral surface () facing radially inward, a first axial surface () facing a crankcase, a second axial surface () facing a combustion chamber and parallel to the first axial surface (), and a protrusion () formed on the outer peripheral surface () in a position offset from an intermediate position between the first axial surface () and the second axial surface () toward the first axial surface () and protruding radially outward from the outer peripheral surface ().