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Title: Earthquake-proof shoe for bridges
Claims: Claims:
What is claimed is: 1. An earthquake oscillation absorbing shoe including: a lower shoe member having a pair of upstanding claws, one adjacent each end of said central portion; an upper shoe member seated on said lower shoe member between said claws, the ends of said upper shoe member being spaced from each of said claws to form a gap therebetween; a pair of packing elements, one seated in each of said gaps and contacting both said upper shoe member and the adjacent one of said claws; said packing elements each having a resilient rubber body characterized by a plurality of truss-like webs separated by openings to absorb relative oscillatory motion between said upper and lower shoes in the direction of the plane of the top surface of the lower shoe such as would be generated by an earthquake. 2. An earthquake oscillation absorbing shoe as described in claim 1 further including a rubber pad having a pair of faces, one face being flat and the other undulating, said flat face being directed toward said rubber body. 3. An earthquake oscillation absorbing shoe as described in claim 2 further including an inner plate adhered to said one face of said rubber pad and seated against said rubber body. 4. An earthquake oscillation absorbing shoe as described in claim 3 further including an outer plate having a low friction surface, said surface being seated against said undulating surface and compressible side members connecting said inner and outer plates. 5. An earthquake oscillation absorbing shoe as described in claim 1 further including each of said packing elements having an inner plate and an outer plate, with said rubber body therebetween. 6. An earthquake oscillation absorbing shoe including: a lower shoe member having a pair of upstanding claws, one adjacent each end of said central portion; an upper shoe member seated on said lower shoe member between said claws, the ends of said upper shoe member each having a recess opening through the end thereof and seating around three sides of the adjacent one of said claws and being spaced from each of the sides of said claws to form a gap therebetween; a packing element seated in each of said gaps and contacting both said upper shoe member and the adjacent side of one of said claws; said packing elements each having a resilient rubber body characterized by a plurality of truss-like webs separated by openings to absorb relative oscillatory motion between said upper and lower shoes such as would be generated by an earthquake. 7. An earthquake oscillation absorbing shoe as described in claim 6 further characterized in that each of said claws and recesses is rectilinear. 8. An earthquake resistant support for a structure comprising an earthquake oscillation absorbing shoe as described in claim 6 wherein means are provided for securing said lower shoe member to the ground and said structure resting on and supported by said upper shoe and said packing elements absorbing relative movement parallel to the ground between said shoe members and increasing the time interval during which load transmission is increased in each oscillation. Other info: 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:
Other Refs: Primary Examiner: Byers, Jr.; Nile C. Assistant Examiner: Attorney: Price, Heneveld, Huizenga & Cooper Claims:
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