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:
Jul. 29, 2025
Filed:
Dec. 20, 2022
Nok Corporation, Tokyo, JP;
Nobuhiko Narita, Tottori, JP;
Koki Shionuma, Tottori, JP;
NOK CORPORATION, , JP;
Abstract
A torsional damper is provided having a hub in which a boss adapted to be fixed to a rotating shaft, such as a crankshaft of an engine, and an annular rim are integrally provided via a plurality of stays, and an annular vibration ring connected to an outer circumferential surface of the rim via an elastic body. The stays have a circumferential width dimension that does not exceed one-quarter of the wavelength of the axial resonant frequency of the hub, and are thickened within a range in which the axial thickness dimension does not exceed one-half of the wavelength of the axial resonant frequency of the hub. Thickening of the stays is implemented by, for example, setting the axial thickness dimension thereof to a length equal to or more than one-quarter of the wavelength of the axial resonant frequency of the hub. The stays have an axially inclined shape.