Static structures (e.g. – buildings) – Means compensating earth-transmitted force – Relative motion means between a structure and its foundation
Patent
1985-07-08
1987-05-05
Murtagh, John E.
Static structures (e.g., buildings)
Means compensating earth-transmitted force
Relative motion means between a structure and its foundation
248636, 248638, 248567, E04H 902
Patent
active
046621334
ABSTRACT:
A floor system for seismic isolation comprises a floor member disposed above a foundation, a plurality of supports for supporting the floor member in a manner to be movable in a horizontal direction and a number of restoring devices disposed between the foundation and the floor member and each comprising first and second restoring units. The first and second restoring units have the same structure and are arranged in the directions perpendicular to each other. The restoring unit comprises a pair of sliding members movable toward and away from each other; tension coil springs anchored between the sliding members to couple one of the sliding members to the other sliding member, a plurality of stoppers for preventing these sliding members from being moved within a predetermined distance toward each other, and engaging members secured to the floor member and adapted to, when the floor member is moved relative to the foundation, engage with the sliding member to permit it to be moved against an urging force of the tension coil spring.
REFERENCES:
patent: 1651411 (1927-12-01), Porter
patent: 2001169 (1935-05-01), Wallace
patent: 2312718 (1943-03-01), Kouyoumjian
patent: 4040590 (1977-08-01), Baratoff
patent: 4371143 (1983-02-01), Ishida
patent: 4402483 (1983-09-01), Kurabayashi
patent: 4517778 (1985-05-01), Nicolai
patent: 4527365 (1985-07-01), Yoshizawa
patent: 4554767 (1985-11-01), Ikonomou
Kabushiki Kaisha Toshiba
Murtagh John E.
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