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. 14, 1987
Filed:
Sep. 20, 1984
Takashi Funaki, Tokyo, JP;
Katsuto Nakatsuka, Sendai, JP;
Yakumo Industrial Corporation, Tokyo, JP;
Abstract
A vibration damping apparatus utilizing the phenomenon of an apparent viscosity created by the combination of a magnetic body and a magnetic fluid due to the magnetic fields of the magnetic fluid. The apparatus is a piston system, including an inner cylinder formed of a magnetic body accommodated within an outer cylinder formed of a nonferrous material. A passage of suitable dimensions is defined between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the outer cylinder. A magnetic fluid is stored within the outer cylinder. The inner cylinder is firmly secured at its upper face to a supporting shaft formed of a nonferrous material. The supporting shaft is provided at its upper end with an upper frame for suitable devices through a planar plate when the apparatus is used as a vibration proofing frame. Likewise, lower frame is arrange under the lower face of the outer cylinder portion.