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:
Aug. 27, 2019
Filed:
Nov. 15, 2016
Unipres Corporation, Yokohama-shi, Kanagawa, JP;
Atsushi Kobayashi, Fuji, JP;
Yutaka Murata, Fuji, JP;
UNIPRES CORPORATION, Yokohama-Shi, JP;
Abstract
The present invention relates to a dynamic damper provided with a planetary dear device and damper springs and aims to obtain an increased adjustable range of gear ratio for obtaining a desired reduction of rotating fluctuation and to reduce a size in a radial direction. A plurality of planetary gearsare provided, each forms a stepped shape (Ravigneau type planetary gear device) and is constructed by a small diameter pinionand a large diameter pinionjuxtaposed in an axial direction so as to be rotated integrally. Rotating elements, which are selectively and desirably arranged to mesh with the small diameter pinionand the large diameter pinion, are large diameter and small diameter ring gears and large diameter and small diameter sun gears. In addition to a carrier connecting the plurality of stepped shaped planetary gears, two rotating elements are selected from the large diameter and small diameter ring gears and the large diameter and small diameter sun gears. Among the selected elements, two selected rotating elements, for example, the large diameter sun gear and the carrier are assigned to the inlet and the outlet elements, respectively and the remaining small sun gearis assigned to the mass element.