Single-end-mount seismic isolator

Details Single-end-mount seismic isolator Single-end-mount seismic isolator

2006-08-15

2006-08-15

Kramer, Devon C. (Department: 3683)

Spring devices

Vehicle

Mechanical spring and nonresilient retarder

C267S205000, C267S207000, C267S135000

Reexamination Certificate

active

07090207

ABSTRACT:
A single-end-mount seismic isolator for protecting a structure from the effects of seismic shock or other external applied forces includes a load shaft that is secured at its first end to a mounting surface on which the structure is supported. So secured, the load shaft projects beyond a base of the structure, on which an actuator is supported. A resilient element, such as a friction spring, is operably interposed between the load shaft and the actuator to allow relative motion between the structure and the mounting surface in the event of a seismic shock or other external applied force. The resilient element also absorbs energy of such motion. The single-end-mount design facilitates seismic retrofitting of existing structures and servicing of seismic isolators in the field. In dual-action embodiments, the resilient element includes primary and secondary resilient elements for damping in two directions.

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Carl Fenstermacher, “Introduction to Friction Springs and Their Use,” White Paper, (undated, believed to be published before Feb. 2003), Ringfeder Corporation, 2 pages.
Ringfeder Corporation, “Friction Rings in Mechanical Engineering,” catalog (undated, believed to be published before Feb. 2003), 8 pages.

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