| 摘要 |
The present invention is a novel cleat system for efficient and reliable attachment, disengagement and reattachment to a shoe. The cleat system includes a shank and a nut. The shank includes a head on one end with a leading end on the shank opposite the head. The nut has a wall which generally defines a bore having opposed edges which define a slot at least partially extending through the wall. Displacement structure is provided on at least one of the shank and the nut which provide a mechanical advantage in translating rotary and axial forces into generally circumferential and radial forces. Threads are provided on at least one of the shank and the nut for promoting axial displacement to engage and disengage the displacement structure. Threaded engagement and disengagement of the displacement structure deform or release the wall of the nut resulting in expanding and relaxing of the nut. In the invention, the nut includes threads on an interior surface of the wall which engage threads on an external surface of the leading end of the shank. Engagement of the threads causes the displacement structure to expand the wall of the nut to engage a bore of the work piece in which the nut is inserted. In both embodiments the displacement structure and threads are configured to provide frictional engagement.
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