Patent ID: 7886489

Claim:
A device for buffering horizontal acceleration acting on a structure, comprising: a first set and a second set of a plurality of cylindrical rotatable rollers having the first set of a plurality of cylindrical rotatable rollers intersecting the second set of a plurality of cylindrical rotatable rollers in an up-down direction and said first and second sets of a plurality of cylindrical rotatable rollers are interposed between a foundation of the structure and structure members of the structure, wherein said first and second sets of a plurality of cylindrical rotatable rollers support the structure in its entirety in the vertical direction and said first set of a plurality of cylindrical rotatable rollers directly contact said second set of a plurality of cylindrical rotatable rollers; and a pair of gears, formed directly on intersecting portions of each of the plurality of cylindrical rotatable rollers, in respective circumferential and longitudinal directions thereof with the gears in the circumferential direction directly contacting and meshing with the gears in the longitudinal direction, wherein said pairs of gears maintain a constant angle at which all of the plurality of cylindrical rotatable rollers intersect.