Ball-in-cone seismic isolation bearing
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United States of America Patent
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Feb 4, 1997
Grant Date -
N/A
app pub date -
Feb 9, 1994
filing date -
Feb 9, 1994
priority date (Note) -
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Abstract
A seismic isolation bearing for structures consisting a steel ball sandwiched between two horizontal, steel load plates. The load plates have a shallow, concave, conical recess of vertical, collinear axis. The cone axis passes through the ball centerline at rest. The load plates are bolted the structure under and above. Gravity restores the bearing's displacement in the lack of external forces. Lateral bearing forces are independent of displacements.
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