Seismic isolator

Details Seismic isolator Seismic isolator

1984-10-26

1986-07-15

Murtagh, John E.

Static structures (e.g., buildings)

Means compensating earth-transmitted force

Relative motion means between a structure and its foundation

E04H 902

Patent

active

045998345

ABSTRACT:
A seismic isolator has a sliding plate fixed on the lower surface of a building, a connecting plate underlying the sliding plate, an elastic first support disposed between the connecting plate and a foundation of the building to support the building, a second support disposed between the connecting plate and the foundation and urged by a biasing force of a spring member such that its upper end is brought into tight contact with the lower surface of the connecting plate, and a jack for adjusting the biasing force of the spring member. A frictional force acting between the sliding plate and the connecting plate is larger than that between the connecting plate and the upper end of the second support.

REFERENCES:
patent: 3638377 (1972-02-01), Caspe
patent: 3794277 (1974-02-01), Smedley et al.
patent: 4187573 (1980-02-01), Fyfe et al.
patent: 4496130 (1985-01-01), Toyama
patent: 4517778 (1985-05-01), Nicolai

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