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:
Feb. 05, 2019
Filed:
Dec. 01, 2015
Kabushiki Kaisha Riken, Chiyoda-ku, Tokyo, JP;
KABUSHIKI KAISHA RIKEN, Chiyoda-ku, Tokyo, JP;
Abstract
An oil ring () includes an oil ring body () and a coil expander (). The oil ring body () includes a pair of rail portions () each including an end portion of an outer periphery having a land () formed protruding radially outward from each rail portion (). The land () includes an upper axial portion () and a lower axial portion () facing opposite to each other in an axial direction, a tapered portion () having one axial end contiguous to the upper axial portion () via a first curved portion (), and a protruding portion () having one of axial ends contiguous to the tapered portion () and the other axial end contiguous to the lower axial portion () via a second curved portion (). The protruding portion () is protruding in a direction perpendicular to the tapered portion ().