Patent ID: 8833745
Filing Date: 2014-09-16
Classification: E04H,F16F

Abstract:
1. A seismic isolation device for isolating an upper structure from a lower structure, the seismic isolation device comprising: an upper plate adapted to be fixed to the upper structure and having a spherically concave lower surface with a downward opening; a lower plate adapted to be fixed to the lower structure and having a spherically concave upper surface with an upward opening; a movable body movably arranged between the upper plate and the lower plate, wherein said movable body comprises a spherically convex upper surface opposing to the spherically concave lower surface of the upper plate, and a spherically convex lower surface opposing to the spherically concave upper surface of the lower plate, at least one of the spherically convex upper surface and the spherically convex lower surface having a plurality of air blowout ports; and an air controller in operative communication with the air blowout ports and configured to selectively switch between: