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. 04, 2000
Filed:
May. 15, 1998
Etsunori Fujita, Hiroshima, JP;
Yutaka Sakamoto, Hiroshima, JP;
Hiroki Honda, Hiroshima, JP;
Yasuhide Takata, Hiroshima, JP;
Hiroki Ohshimo, Hiroshima, JP;
Kazuyoshi Chizuka, Hiroshima, JP;
Delta Tooling Co., Ltd., Hiroshima, JP;
Abstract
A vibration mechanism having a magnetic spring includes a lower frame, an upper frame vertically movably mounted on the lower frame via a plurality of link mechanisms, and at least two permanent magnets mounted on the lower frame and the upper frame, respectively, with the same magnetic poles opposed to each other. A plurality of springs are connected to the link mechanisms to produce a lifting force of the upper frame. The total spring constant of the permanent magnets and the springs is partially set to a negative value or substantially zero.