Earthquake isolation floor

Details Earthquake isolation floor Earthquake isolation floor

1980-10-23

1983-02-01

Foss, J. Franklin

Supports

Machinery support

Including vibration isolation means

52167, 248562, 248636, F16M 100

Patent

active

043711430

ABSTRACT:
An earthquake isolation floor comprises a horizontal plate-like support frame having a generally polygonal configuration, a support frame having a horizontal surface with a similar configuration to that of the fundamental frame in plan view, but of relatively smaller dimensions and slidably mounted thereon, and horizontal tensile springs disposed between the fundamental and support frames each in a prestressed condition such that when the support frame is moved relative to the fundamental frame by an earthquake, etc. the springs are caused to be elongated by the fact that their one end in the direction of the movement does not encounter any resistance to the movement, while the other end opposite to the movement is prevented from moving.

REFERENCES:
patent: 1281921 (1918-10-01), Etherington
patent: 2055000 (1936-09-01), Bacigaupo
patent: 2483295 (1949-09-01), Mortimer
patent: 2912212 (1959-11-01), Lowe et al.
patent: 3762114 (1973-10-01), Eskijian
patent: 3908940 (1975-09-01), Stricht
patent: 4187573 (1980-02-01), Fyfe
patent: 32667759 (1966-08-01), Allen

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