Earthquake-proof shoe for bridges
OwnerTokio Kondo, Ryuma Morishigeinventors
Life of this patent
Estimating the term…
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.
Claims8
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.
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.
Dependencies are inferred from the claim text.