Patent ID: 8006409

Claim:
A spike assembly for sport shoes, comprising: a base including a first disk and a tubular portion extending from a center of a first side of the first disk, with a spiral groove defined in an inner periphery of the tubular portion, with a plurality of protrusions extending axially from the first side of the first disk and connected to an outer periphery of the tubular portion, with each protrusion being a substantially triangular protrusion and including an inclined side relative to the first side of the first disk and a vertical side perpendicular to the first side of the first disk, with a rounded portion connecting between the inclined side and the vertical side, and a spike member including a second disk and a screw portion extending from a center of a first side of the disk, with a plurality of blocks extending from the first side of the second disk and located around the screw portion, with each block including a curved protrusion extending therefrom which faces the screw portion, with a plurality of spikes extending from a second side of the second disk, with the screw portion engaged with the spiral groove in the tubular portion, and with the curved protrusions sliding along the inclined sides of the protrusions, moving over the rounded portions, and being stopped by the vertical sides.