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:
Apr. 02, 2002
Filed:
Nov. 18, 1999
Toshio Omi, Sakura, JP;
Minoru Ohiraki, Chiba, JP;
Mitsubishi Steel Mfg. Co., Ltd., Tokyo, JP;
Abstract
A flat-type seismic isolator for exhibits includes a lower face plate installed on a foundation; an upper face plate that is installed to the lower surface of a seismic isolation object and placed above the lower face plate; an intermediate plate placed between the upper face plate and the lower face plate; and elastic restoring means and damping means provided for returning the plates to their original positions and placed in a lower area between the lower face plate and the intermediate plate and an upper area between the intermediate plate and the upper face plate, respectively. In the lower area, one lower linear guide rail is disposed in the center of the area and guide rails and rollers are disposed on opposite sides of the lower linear guide rail in parallel relation therewith for smoothly moving the intermediate plate with respect to the lower face plate in one linear direction. In the upper area, one upper linear guide rail is disposed in. the center of the area and guide rails and rollers are disposed on opposite sides of the upper linear guide rail in parallel relation therewith for smoothly moving the upper face plate with respect to the intermediate plate in one linear direction. The lower linear guide rail and the upper linear guide rail orthogonally cross each other, and the guide rails and rollers in the lower area and the upper area orthogonally cross each other.