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. 29, 1995
Filed:
Feb. 18, 1994
Yasuhiko Aida, Yokohama, JP;
Hiroshi Miyano, Kamakura, JP;
Kiyoshi Hattori, Yokohama, JP;
Yoshiyuki Sakurai, Yokohama, JP;
Eiji Manome, Yokohama, JP;
Toshiaki Nasuda, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A dynamic vibration absorber includes a movable weight portion, and a movable portion magnet assembly provided for the movable weight portion. The movable portion magnet assembly includes a magnet train having a plurality of cylindrical magnets disposed coaxially in such a manner that adjacent cylindrical magnets have different adjacent magnetic poles. A fixed portion is provided in opposed relation to the movable weight portion and a fixed portion magnet train is provided on the fixed portion and includes a plurality of magnets having magnetic poles different, in a stationary state, from opposed magnetic poles of the cylindrical magnets. The movable weight portion is preferrably disposed in a vessel. A magnetic damper is further provided, which has a plurality of conductor plates mounted on an outer peripheral surface of the movable weight portion, and a plurality of yokes are secured to an inner surface of the peripheral side portions of the cylindrical vessel at portions corresponding to the conductor plates. Each of the yokes have a pair of yoke portions facing each other, and a pair of magnets are provided on the facing surfaces of the paired yoke portions with a gap therebetween into which the corresponding conductor plates are inserted.