Flexible shoe sole

Abstract

There is a shoe sole that has a continuous and uniform sole body. The sole body is configured to have a continuous curve so that both the toe region and the heel region flex upwards away from the mid-foot region and has a downward curving or a flat end region, allowing the mid-foot region of sole to flex toward a surface whereto the sole is placed. Preferably, the sole body is strong and resilient and made from a single type of material, such as iron, steel, aluminum alloy, titanium or resilient plastic. When a wearer steps on the shoe sole, the sole body is flattened. When wearer steps forward to walk or run, the heel region flexes up and provides a pushing force to the heel of the wearer, facilitating the walking or running motion.

What is claimed is: 
     
         1 : A shoe sole assembly, comprising:
 a continuous sole body having a toe region, a mid-foot region, a heel region, a top surface and a bottom surface, wherein
 the sole body is configured to have a continuous curve wherein the toe region flexes upward away from the mid-foot region, and the heel region flexes upwards away from the mid-foot region and has a downward or flat end region, allowing the mid-foot region of the bottom surface to flex toward a surface whereto the shoe sole is placed. 
   
     
     
         2 : The shoe sole assembly of  claim 1 , wherein
 the sole body is strong and resilient.   
     
     
         3 : The shoe sole assembly of  claim 1 , wherein
 the sole body is made from a single type of material.   
     
     
         4 : The shoe sole assembly of  claim 3 , wherein
 the single type of material is selected from a group consisting of: iron, steel, titanium, aluminum alloy, and resilient plastic.   
     
     
         5 : The shoe sole assembly of  claim 1 , wherein
 the mid-foot region has a consistent mid-foot curvature.   
     
     
         6 : The shoe sole assembly of  claim 1 , wherein
 the sole body is configured to become flat when a foot is pressed upon the sole body, and   the heel region flexes up when the heel of the foot is lifted to start a walking or running motion.   
     
     
         7 : The shoe sole assembly of  claim 1 , further comprising:
 a shoe counter having a heel portion and a stretching portion, wherein
 the heel portion is attached to a back end of the heel region of the sole body and stands generally vertical to the heel region, 
 and the stretching portion connects the heel portion with the mid-foot region. 
   
     
     
         8 : The shoe sole assembly of  claim 7 , wherein
 the stretching portion is flexible and stretches the mid-foot region to the heel portion.   
     
     
         9 : The shoe sole assembly of  claim 1 , further comprising:
 cleats attached to the bottom surface of the sole body.   
     
     
         10 : The shoe sole assembly of  claim 1 , wherein
 there are anti-slippery treads at the bottom surface.   
     
     
         11 : The shoe sole assembly of  claim 1 , further comprising:
 an outer sole attached to the bottom surface of the sole body.   
     
     
         12 : The shoe sole assembly of  claim 11 , further comprising:
 a shoe upper attached to the top surface of the sole body.   
     
     
         13 : A shoe sole assembly, comprising:
 a titanium sole body having a toe region, a mid-foot region, a heel region, a top surface and a bottom surface,
 wherein the titanium sole body is configured to have a continuous curve wherein the toe region flexes upward away from the mid-foot region, and the heel region flexes upwards away from the mid-foot region and has a downward or flat end region, allowing the mid-foot region of the bottom surface to flex toward a surface whereto the titanium sole body is placed. 
   
     
     
         14 : The shoe sole assembly further comprising an outer sole coupled to the bottom surface of the continuous sole body.