Acoustics – Miscellaneous
Patent
1988-12-21
1990-04-17
Jordan, Charles T.
Acoustics
Miscellaneous
52167, 248569, 248636, 248638, 181401, G10K 1100
Patent
active
049172115
ABSTRACT:
A seismic isolator comprises: a friction device having upper friction plate and a lower friction plate, a friction plane of the upper friction plate and the lower friction plate having a characteristic of Coulomb friction; and horizontally placed springs which reduce a relative displacement and a residual displacement. The upper friction plate includes being any one selected from the group consisting of a polyacetal resin containing lubricating oil, a bronze or brass alloy with solid lubricant buried therein, a sintered alloy with solid lubricant dispersed therein, a porous structure of cast iron with lubricant oil contained therein and a steel backing sintered layer with solid lubricant and oil impregnated therein. Furthermore, the lower friction plate includes being any one surface-treated material selected from the group consisting of a hard chromium-plated plate and a hard nickel-plated plate. A pre-tension is introduced into the horizontally placed springs, the tension being applied to the springs within an area of tension.
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Paper presented at annual technical meeting of the Architetural Institute of Japan on Oct. 1987, in English entitled "Fundamental Study on the Seismic Isolation with the Friction", by Matsumoto et al.
Kurabe Katsunori
Shibata Koichi
Tagawa Kengo
Yamada Takao
Eldred J. Woodrow
Jordan Charles T.
NKK Corporation
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