Shoe sole with improved shock absorbing effect

Abstract

The Invention describes a shoe sole equipped with a non-linear shock-absorbing characteristic and a peculiar rebound effect, favoring a layout designed for weight maximum containment and maximum ease of use.

I claim: 
     
         1 . A footwear sole of synthetic materials, the sole comprising:
 a tread in contact with the ground ( 15   a ) that rises perimetral with a wall ( 14   a ) along a vertical direction to an upper outer edge ( 12   a ) and a central area ( 10   a ),   an apical area ( 21 ),   a forefoot area ( 200   a ),   an intermediate front area ( 22 ),   a central area ( 23 ),   an intermediate rear area ( 24 ) and   a heel area   wherein said central area of the sole is delimited by a perimetral cracking ( 16   a ) that runs along the entire inner perimeter of the sole separating said central area ( 10   a ) from the upper outer edge ( 12   a ) and the wall ( 14   a ), said central area connected to the sole through the tread area, said central area also added to the sole ( 10   b ) in the inner tread area ( 11   b ),   wherein perimetral cracking has a variable thickness around the entire perimeter of the sole, and   wherein one or more groups of transverse cracking are arranged in the central area of the sole between the apical area ( 200   a ) and the heel area ( 25 ), said cracking differentiated by thickness and length, said groups also consisting of a single cracking,   
     
     
         2 . The sole of  claim 1 , wherein the perimetral cracking has a variable width along the entire inner perimeter of the sole
 wherein an apical area is arranged with a perimetral cracking with a width of 3 mm. ( 201   a ),   wherein a forefoot area is delimited by the section lines A-A′/B-B′ with a perimetral cracking that increases its width from 3 mm. to 4 mm. ( 26 ),   wherein an intermediate front area is delimited by the section lines B-B′/C-C′ with a perimetral cracking that increases its width from 4 mm. to 5 mm. ( 27 ),   wherein a central area is delimited by section lines C-C′/D-D′ with a perimetral cracking that increases its width from 5 mm. to 6 mm. ( 270 ),   wherein intermediate rear area is delimited by section lines D-D′E-E′ with a perimetral cracking that decreases its width from 6 mm. to 3 mm. ( 271 ), and wherein an area of the heel is arranged with a perimetral cracking with a width of 3 mm. ( 272 ).   
     
     
         3 . The sole of  claim 1 , wherein four groups of transverse cracking are arranged in the central area of the sole
 wherein a first group of three cracking ( 28 ,  29 ,  20   a ) develop from the forefoot area ( 220   a ) to the intermediate front area ( 22 ), said cracking being characterized by a thickness of 2 mm,   wherein a second group of three cracking ( 21   a ,  22   a ,  23   a ,) develop from the intermediate front area to the central one, characterized by a thickness of 4 mm,   wherein a third group of three cracking ( 24   a ,  25   a ,  26   a ) develop from the central zone to the intermediate rear one, characterized by a thickness of 4 mm. excluding cracking in the central area of the sole, which is 6 mm, and   wherein a fourth group of three cracking ( 27   a ,  28   a ,  29   a ) that goes from the intermediate rear area to the heel area, characterized by a thickness of 2 mm.   
     
     
         4 . The sole of  claim 1 , wherein an elasticity factor loses its linear and progressive character when subjected to a force along the vertical axis ( 33 ) such as to expand said central area until contact with the upper outer edge ( 12   a ) and the sole wall ( 14   a ). 
     
     
         5 . The sole of  claim 1 , wherein one or more elastic devices to increase the rebound effect are arranged upon the central area ( 10   a ), and
 wherein each device of the one or more elastic devices is comprised of:
 a metal material and/or a synthetic material with no shape memory, 
 an “C” shaped profile ( 64 ) in which the vertices of the sections folded to 90° ( 61 ) have a further torsion to 180° to form a hook ( 62 ) such as to cause a thickening of the apical section, and 
 a shape of the horizontal section of the elastic device that rests on the horizontal surface of the central area of the sole, also of asymmetric type ( 70   a ,  71   a ). 
   
     
     
         6 . The sole of  claim 5 , wherein the vertices of the sections folded to 90° of the elastic devices are inserted inside the perimetral cracking of the sole with a transverse orientation with respect to it ( 63 ). 
     
     
         7 . The sole of  claim 1 , wherein the perimetral cracking is partially or totally filled with a dilating-type elastomeric polymer. 
     
     
         8 . The sole of  claim 1 , wherein one or more cracking part of the transverse cracking groups, are partially or totally filled with a dilating-type elastomeric polymer. 
     
     
         9 . The sole of  claim 1 , wherein the perimetral cracking and the cracking part of the transverse cracking group are partially or totally filled with a dilating-type elastomeric polymer. 
     
     
         10 . The sole of  claim 1 , wherein the width variation of the perimetral cracking occurs near the reciprocal intersections of the section areas A/A′, B/B′, C/C′, D/D′, E/E′, staying constant within the limits of each section area. 
     
     
         11 . The sole of  claim 1 , wherein the perimetral cracking has a constant width along the entire inner perimeter of the sole. 
     
     
         12 . The sole of  claim 1 , wherein, inside one or more transverse cracking belonging to the transverse cracking groups, one or more elastic bumper elements ( 100 ) are inserted, said elements made from a sheet of synthetic or metallic material, without shape memory, in the shape of a double ogive with two concave and opposing side walls ( 101 , 102 ) generating an internal opening ( 103 ), said elastic buffer elements also characterized by a height “h” ( 110 ) lower than the depth “h 1 ” ( 111 ) of the transverse cracking belonging to the transverse cracking groups 
     
     
         13 . The sole of  claim 1 , wherein the elastic buffer elements are inserted into the transverse cracking in such a way as to present their side walls in contact with the side walls of the cracking ( 112 ), 
     
     
         14 . The sole of  claim 1 , wherein the elastic effect, the rebound effect and the general dynamic behavior are determined by:
 the material of which the sole is made,   the perimetral cracking   the quantity of the transverse cracking groups,   the insertion of one or more elastic devices in the sole,   the filling of the perimetral cracking and the transverse cracking groups with an elastomeric polymer, and   the insertion within the transverse cracking groups of one or more elastic bumper element.   
     
     
         15 . A footwear, comprising:
 the sole, according to  claim 1 .