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:
May. 16, 1989
Filed:
Jan. 27, 1987
Bridgestone Corporation, Tokyo, JP;
Abstract
An anti-seismic bearing made up of a plurality of rigid plates and viscoelastic flexible plates laminated alternately, said flexible plates being made of a material characterized by that the hysteresis ratio at 100% deformation at 25.degree. C. is 0.15 to 0.60, the loss tangent (tan .delta.) at 0.01% deformation, 5 Hz, at 25.degree. C. is 0.010 to 0.194, and the ratio E(-10)/E(30) is 1.0 to 3.0, where E(-10) is a storage modulus at 0.01% deformation 5 Hz, at -10.degree. C. and E(30) is a storage modulus at 0.01% deformation, 5 Hz, at 30.degree. C. An assembly composed of low-damping anti-seismic bearings and high-damping anti-seismic bearings arranged in parallel such that the anti-seismic bearings support the vertical load and undergo elastic deformation in the horizontal direction.