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.

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.

Abstract: A support arrangement for an exhaust system including an upright muffler and an upwardly-extending exhaust stack located behind the cab of a truck. An arm is mounted on a frame member of the truck, and a vibration isolator supported on the arm in turn supports the weight of an exhaust pipe elbow, a muffler, and a stack located above the muffler, all oriented generally upwardly. An upper connecting assembly is attached to the exhaust stack and to a mounting fastened to the back side of the cab to support the muffler and stack with respect to longitudinal and lateral movement relative to the truck while still permitting some vertical movement of the cab relative to the frame. In one embodiment the upper connecting assembly is attached by way of elastomeric members which permit yet resist movement.