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:
Nov. 17, 1992
Filed:
Aug. 03, 1990
Toshiyuki Fukumoto, Tokyo, JP;
Eiji Fukuzawa, Tokyo, JP;
Toshikazu Yamada, Tokyo, JP;
Naoki Tanaka, Tokyo, JP;
Akihiko Amana, Tokyo, JP;
Yoshikazu Maeda, Tokyo, JP;
Kajima Corporation, Tokyo, JP;
Abstract
An elasto-plastic damper to protect a building from destructive impact of seismic tremors and/or high winds. The damper is a cylindrical shaft with a constricted waist portion adapted to yield uniformly throughout its length to an external force from any direction in a plane perpendicular to the longitudinal axis of the waist portion. This elasto-plastic deformation of the damper dissipates the energy of seismic and/or wind impact throughout its range of elastic deformation. The ends of the damper are threaded to facilitate threaded fastener engagement with structural and non-structural members of building.