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. 19, 1991
Filed:
Nov. 21, 1989
Takuji Kobori, Tokyo, JP;
Shunichi Yamada, Tokyo, JP;
Shigeru Ban, Tokyo, JP;
Koji Ishii, Tokyo, JP;
Isao Nishimura, Tokyo, JP;
Masatoshi Ishida, Tokyo, JP;
Kuniaki Sato, Tokyo, JP;
Yasuo Takenaka, Tokyo, JP;
Shozo Maeda, Tokyo, JP;
Jun Tagami, Tokyo, JP;
Kajima Corporation, Tokyo, JP;
Abstract
An elasto-plastic damper is adapted to be used in a structure, such as a building and other facilities, for absorbing vibration energy created by earthquake tremors and other ground vibrations. The damper is a centrally bulged and generally cone-shaped hollow body of revolution so that its section modulus changes substantially porportional to a bending moment created in the damper body due to horizontal stresses, thus permitting a maximum degree of deformability. This elasto-plastic damper is compact in size and demonstrates a high degree of vibrational energy absorbability.