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Title: Earthquake-proof shoe for bridges

Abstract: A receiving plate for opposite ends of an upper shoe is placed between claws at opposite ends of a lower shoe, rubber packings are detachably provided in the gap spaces between the respective claws and the receiving plate, and the rubber packing consists of an inner plate, a first buffer rubber layer, a middle plate, a second buffer rubber layer and an outer plate. The first buffer rubber layer is made of two flat rubber plates with a plurality of rubber truss plates connected therebetween in a zig-zag form so as to form a large number of vacancies within the first buffer rubber layer, and hence, an impact force caused by an earthquake is absorbed by the rubber packing to prevent the receiving plate or the claws from being destroyed.


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Inventors: Kondo, Tokio (3-35-1-1003, Hamadayama, Suginami-ku, Tokyo-to, JP)
Morishige, Ryuma (270-47, Fuse, Kashiwa-shi, Chiba-ken, JP)

Application Number: 06/231761
Filing Date: 1981-02-05
Publication_date: 1982-12-14
Assignee: Kondo, Tokio
Morishige, Ryuma

Primary Class(es): 14/73.500 52/167.100, 52/167.900, 52/167.400, 248/614
Other Classes: E01D19/04; E04H9/02; E01D19/06
US Patent Ref:
1440498January, 1923Shurtleff248/632Electric-motor base support
1572574February, 1926Stromborg52/167Device for protecting structures against earthquake damage
1873009August, 1932Miller248/614Radiotransmitter mounting
2631800March, 1953Pinkston248/507Motor mount for power tools
3073065January, 1963Alderman52/167Expansion joint unit and method of installing the same
3349418October, 1967Hein14/161Low friction structural bearing
3387814June, 1968Fischer248/507Component mounting clamp
3889907June, 1975De Sourdis248/615Machinery mount
4134561January, 1979Atkinson248/632Sound suppressing engine mounting means
4188681February, 1980Tada52/167Support structure
4258516March, 1981Mori52/167Apparatus for supporting floor plates above substrate

Other Refs:
Primary Examiner: Byers, Jr.; Nile C.
Assistant Examiner:
Attorney: Price, Heneveld, Huizenga & Cooper
Claims: