Aseismatic device

Details Aseismatic device Aseismatic device

2006-04-18

2006-04-18

Jules, Frantz F. (Department: 3617)

Static structures (e.g., buildings)

Means compensating earth-transmitted force

Cross bracing

C052S167400, C052S066000, C104S089000

Reexamination Certificate

active

07028433

ABSTRACT:
An aseismatic device applied to an overhead hoist transport (OHT) system in a fab has a spring pin and a positioning ball installed in a cavity of a first platform. The spring pin has at least a spring for fixing the positioning ball and is mounted on a second platform positioned on the surface of the first platform. When the earthquake occurs, the second platform will move horizontally corresponding to the first platform for preventing the OHT system and the fab from being damaged.

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patent: 4974378 (1990-12-01), Shustov
patent: 5452549 (1995-09-01), Medeot et al.
patent: 2003/0167707 (2003-09-01), Tsai
patent: 2003/0205004 (2003-11-01), Shreiner
patent: 6234495 (1994-06-01), None
patent: 06234495 (1994-08-01), None

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