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:
Feb. 01, 1983
Filed:
Oct. 23, 1980
Jiro Ishida, Kamagaya, JP;
Takafumi Fujita, City of Chiba, Chiba Prefecture, JP;
Mitsubishi Steel Mfg. Co., Ltd., Tokyo, JP;
Other;
Abstract
An earthquake isolation floor comprises a horizontal plate-like support frame having a generally polygonal configuration, a support frame having a horizontal surface with a similar configuration to that of the fundamental frame in plan view, but of relatively smaller dimensions and slidably mounted thereon, and horizontal tensile springs disposed between the fundamental and support frames each in a prestressed condition such that when the support frame is moved relative to the fundamental frame by an earthquake, etc. the springs are caused to be elongated by the fact that their one end in the direction of the movement does not encounter any resistance to the movement, while the other end opposite to the movement is prevented from moving.