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. 05, 2026
Filed:
Apr. 08, 2022
Nok Corporation, Tokyo, JP;
Hideya Watanabe, Kitaibaraki, JP;
NOK CORPORATION, , JP;
Abstract
A sealed structure includes: a shaft; a member having a hole for the shaft; and a sealing ring sealing a gap between the shaft and the member. The shaft has a circular ring groove centered around the central axis of the shaft. The bottom surface of the groove has a recess. The sealing ring has a protrusion protruding toward the central axis. The protrusion fits into the recess. When the shaft rotates, an end face X of the protrusion and an end face Y of the recess contact each other to push the sealing ring radially outward. An angle α of a straight line representing the end face X relative to the radial direction of the sealing ring and an angle δ of a straight line representing the end face Y relative to the radial direction of the shaft are both at least 45 degrees.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile