Isolator for seismic activity

Details Isolator for seismic activity Isolator for seismic activity

1988-02-05

1989-01-31

Foss, J. Franklin

Supports

Including energy absorbing means, e.g., fluid or friction...

52167, 248564, 248584, F16M 1300

Patent

active

048011223

ABSTRACT:
An apparatus for supporting an object on a base for isolating the object from movement of the base, typically an art object, instrument, case, or housing for projection during seismic activity. The apparatus includes a base plate for attachment to the base, with a frame positioned on the base plate and adapted for omni-directional movement over the base plate. A lever is pivotally mounted on the frame and is connected to a spring, typically by a cable. The lever is also connected to the base plate, typically by another cable, with movement of the base plate moving the lever and extending the spring, after which the spring retracts, restoring the apparatus to the rest position.

REFERENCES:
patent: 3266759 (1966-08-01), Allen
patent: 3908940 (1975-09-01), Van Der
patent: 4101102 (1978-07-01), Lloyd
patent: 4330103 (1982-05-01), Thuries
patent: 4371143 (1983-02-01), Ishida
patent: 4402483 (1983-09-01), Kurabayashi
patent: 4565039 (1986-01-01), Oguro
patent: 4577826 (1986-03-01), Bergstrom
patent: 4596373 (1986-06-01), Omi
patent: 4662133 (1987-05-01), Kondo

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