Patent ID: 7237364

Claim:
A foundation shock eliminator comprising: an upper block having a top surface and a bottom surface; a lower stationary base mounted under the upper block and having a top surface and a bottom surface; and an interconnecting assembly mounted between the upper block and the lower stationary base and comprising an upper track having an upper concave surface attached to the bottom surface of the upper block; a lower track having a lower concave surface attached to the top surface of the lower stationary base and arranged in an intersecting manner across the upper concave surface of the upper track; and a track joint slidably mounted between the upper track and the lower tracks and having: an upper sliding block slidably mounted on the upper track along the upper concave surface of the upper track and having a top, a bottom and an upper contacting surface defined in the bottom of the upper sliding block; and a lower sliding block slidably mounted on the lower track along the lower concave surface of the lower track and having a top, a bottom and a lower contacting surface defined in the top of the lower sliding block and rotatably contacted with the upper contacting surface in the upper sliding block.