Patent ID: 7793437

Claim:
A shoe sole for a shoe for a foot, the shoe sole having a longitudinal direction that extends between a toe end and the heel end and a transverse direction that extends between an outer side and an inner side of the of the shoe sole, said shoe sole comprising: a molded shoe sole having an upper surface and a lower surface; wherein said lower surface that is continuously curved, from a heel portion forward toward a toe portion with a ground surface; wherein said lower surface includes a first portion having a first radius of curvature and a second portion having a second radius of curvature that is smaller than said first radius of curvature; wherein said upper surface has a multi-planed contour that includes a heel section, an arch section, a ball section, and a toe section; wherein said upper surface in said heel section and in said arch section has a plane that is higher along said outer side and lower along said inner side; and wherein, when a wearer wearing a shoe constructed with said molded shoe sole goes through a walking step, said continuously curved lower surface provides a continuous forward rolling contact of said lower surface with said ground surface in said longitudinal direction and said multi-planed upper surface facilitates a side rolling motion of said wearer's foot, initially toward said outer side and then toward said inner side and simultaneously a forward rolling motion of said foot in said longitudinal direction from said heel section through to said toe section, thereby promoting a natural forward-rolling and side-rolling motion that corresponds to a natural motion of a foot of a person walking barefoot on sand.