Static structures (e.g. – buildings) – Means compensating earth-transmitted force – Relative motion means between a structure and its foundation
Patent
1983-10-11
1986-06-10
Perham, Alfred C.
Static structures (e.g., buildings)
Means compensating earth-transmitted force
Relative motion means between a structure and its foundation
188378, 248636, 248638, 267136, E04H 902, E04B 136
Patent
active
045935017
ABSTRACT:
An isolator for use in protecting buildings and other structures from the effects of vibration and shock due to an earthquake. The isolator comprises a stack of elastic bearings interconnected at their outer peripheries and located between and coupled to an upper plate and a lower plate. The junctions between adjacent elastic bearings and between the upper and lower elastic bearings and the upper and lower plates are provided with intermediate plates extending beyond the outer peripheries of the elastic bearings. The intermediate plates have aligned holes near their outer peripheries for receiving vertical rods whose lower ends are releasably coupled to rod-holding devices mounted on the lower plate. The rods provide lateral stiffness for the isolator and, by proper selection of the lengths of the rods, the stiffness of the isolator can be adjusted as desired. By providing a single isolator body with a given number of elastic bearings and by proper selection of the rod lengths and size, it is possible to provide isolators capable of meeting different design requirements yet all isolators have the same basic body of a given diameter.
REFERENCES:
patent: 2987291 (1961-06-01), Dyson
patent: 3908054 (1975-09-01), Ito
patent: 4117637 (1978-10-01), Robinson
patent: 4179104 (1979-12-01), Skinner
patent: 4258516 (1981-03-01), Mori et al.
patent: 4363149 (1982-12-01), Kondo et al.
Isosys, Inc.
Perham Alfred C.
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