Spike shoe

Claim 1

A spike shoe comprising: a shoe upper; a bottom base on the bottom of said upper; a layer of resilient elastic material affixed to said bottom base; a bottom sheet covering the bottom of said layer, said bottom sheet having high wear resistance; a plurality of holes through said layer and said bottom sheet; a plurality of spike pins in said plurality of holes attached to said bottom base and extending toward said layer; each of said spike pins having a spike portion and a mounting portion, each said mounting portion being wider than its respective spike portion and being located in abutment with said bottom base and extending part way toward said bottom sheet; said layer having a thickness sufficient to completely contain said spike pins when said layer is in an uncompressed condition; each of said plurality of holes being closely fitted to a respective one of said spike pins; said layer having a resilience sufficient to permit compression thereof under the weight of a human body which is effective to extend a substantial portion of said spike portions beyond said bottom sheet; concave portions in the upper surface of said bottom sheet, one concave portion surrounding each of said holes and each having a contour which is effective to permit its respective mounting portion to approach said bottom sheet during compression of said layer without deforming said bottom sheet; said layer being effective to increase its thickness sufficiently when said weight is removed to cover said spike pins, such increase in thickness being effective to remove mud and other matter from said spike portions as a result of the close fit between said holes and said spike pins and leave a bottom surface of said bottom sheet without protrusion of said spike portions therepast whereby said mud and other matter may be easily scraped therefrom.