Patent ID: 8061697

Claim:
A rotatable wheel having a rotary shock absorber coupled on an axle and between a disc brake rotor and the rotatable wheel, the rotary shock absorber comprising a hollow disc structure filled with lubricant, the disc structure having a central circular opening, a sealing plate coupled to and sealing the central circular opening on one side and a sealing boot portion coupled to and sealing the central circular opening on the other side, and a circular hub portion nesting smoothly and snugly inside the hollow disc structure, the hub portion having six circular through holes, at least one identical helical springs nested firmly inside each of the six circular through holes, six lug bolts each having two threaded ends and a smooth body, each of the six lug bolts coupled rigidly and perpendicularly at the center of each of the corresponding helical spring and secured on both ends at each side of the hollow disc structure.