Seismic isolation bearing
AssigneeMM Systems of Arizona
InventorZoltan A. Kemeny
Life of this patent
Estimating the term…
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.
Claims20
An isolation bearing assembly, comprising:
- an upper load plate having a first downwardly facing surface;
- an oppositely disposed lower load plate having a second upwardly facing surface;
- a reinforced rubber bearing body extending between and contacting said first and second surfaces;
- a mid plate disposed approximately midway between and substantially parallel to said first and second surfaces and having a distal portion which extends radially beyond said body, said distal portion including a plurality of holes formed therein;
- at least one first yield pin extending substantially orthogonally from said first surface, through a first one of said holes, and having a first distal end terminating between said first hole and said second surface;
- at least one second yield pin extending substantially orthogonally from said second surface, through a second one of said holes, and having a second distal end terminating between said second hole and said first surface;
- wherein, in response to an externally applied lateral force, said body is configured to resiliently deflect such that said first and second pins are engaged by said distal portion of said mid plate to thereby plastically deform said pins.
A seismic isolation bearing for bridges, buildings and machines comprising:
- a steel reinforced rubber bearing body sandwiched between a first and second bearing load plates;
- a plurality of exposed and tapered steel pin yields, fixed to each of said first and second bearing load plates;
- and
- a mid plate, embodied in said bearing body, said mid plate having a plurality of holes said yielders extending from said first and second bearing load plates and through said holes.
The bearing of 15 where said mid plate comprises two sub plates bolted together.
Dependencies are inferred from the claim text.