Abstract: A vibration attenuation device comprises a first section and a second section, each section comprising an insulating material such as rubber. The first section and the second section are aligned end-to-end. Typically, the insulating material is cylindrically-shaped to provide for easy alignment between the two sections. The base of a U-shaped first anchor is substantially surrounded by the insulating material of the first section. The base of a U-shaped second anchor is substantially surrounded by the insulating material of the second section. The legs of the first anchor extend from the base of the first anchor to beyond the base of the second anchor and the legs of the second anchor extend from the base of the second anchor to beyond the base of the first anchor. Additional sections comprising insulating material and anchors may be added to provide more flexibility.

Abstract: A seismic isolation bearing for bridges, buildings and machines with steel reinforced rubber body and external or internal tapered steel pin uniform yielders. The pins are fixed to load plates and intersect in mid plate or in the bearing body. External pins may be threaded ended to be used with nuts and other hardware as temporary press for assembly. Also as temporary ties for handling before installation or as anchorbolts. Vertical bearing stiffness is greatly controlled by the size of a central hole, passing vertically through the bearing.

Abstract: A seismic isolation bearing for bridges, buildings and machines with steel reinforced rubber body and external or internal tapered steel pin uniform yielders. The pins are fixed to load plates and intersect in mid plate or in the bearing body. External pins may be threaded ended to be used with nuts and other hardware as temporary press for assembly. Also as temporary ties for handling before installation or as anchorbolts. Vertical bearing stiffness is greatly controlled by the size of a central hole, passing vertically through the bearing.