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:
Jan. 27, 2004
Filed:
Oct. 31, 2002
Kazuhiko Kato, Komaki, JP;
Seiya Asano, Aichi-ken, JP;
Tokai Rubber Industries, Ltd., Aichi-ken, JP;
Abstract
A dynamic damper includes a cylindrical mass metal element, a cylindrical elastic-body attachment portion, a cylindrical elastic-body connection portion, and an elastic-body covering portion. The elastic-body attachment portion is formed from a rubber elastic body and coaxially disposed inside the mass metal element while a predetermined radial distance is maintained therebetween. The elastic-body connection portion is formed from a rubber elastic body and disposed between the mass metal element and the elastic-body attachment portion so as to connect them. The elastic-body covering portion covers the outer circumferential surface of the mass metal element. The elastic-body connection portion and the elastic-body covering portion are not bonded to the mass metal element. A plurality of protrusions are formed and arranged circumferentially on the inner circumferential surface of the mass metal element.