Sole comprising a two-layer midsole

Abstract

Disclosed is a sole with a midsole ( 1 ) for a running shoe, wherein the midsole ( 1 ) comprises a forefoot region (VFB), a heel region (FB) and a midfoot region (MFB) arranged between the forefoot region (VFB) and the heel region (FB), and wherein the midsole comprises an elastic cushioning layer ( 2 ) and a base layer ( 3 ) arranged thereon, wherein the base layer ( 3 ) has a greater hardness than the cushioning layer ( 2 ) and wherein the cushioning layer ( 2 ) forms, in the heel region (FB) and optionally in the midfoot region (MFB) and/or in the forefoot region (VFB), a plurality of channels ( 21, 22 ) extending in the transverse direction (Q) of the sole.

1 . A sole with a midsole ( 1 ) for a running shoe, wherein the midsole ( 1 ) has a forefoot region (VFB), a heel region (FB) and a midfoot region (MFB) arranged between the forefoot region (VFB) and the heel region (FB), and wherein the midsole comprises:
 an elastic cushioning layer ( 2 ) and a base layer ( 3 ), the base layer ( 3 ) arranged at the elastic cushioning layer ( 2 ), wherein the base layer ( 3 ) has a different hardness, than the cushioning layer ( 2 ) and wherein the cushioning layer ( 2 ) forms, in the heel region (FB) and in the midfoot region (MFB) and/or in the forefoot region (VFB), a plurality of channels ( 21 ,  22 ) extending in the transverse direction (Q) of the sole.   
     
     
         2 . The sole according to  claim 1 , wherein the hardness of the cushioning layer ( 2 ) on the Asker C scale is lower or higher than the hardness of the base layer ( 3 ) by at least 10 units, in particular by 10 to 20 units, preferably by 13 to 16 units. 
     
     
         3 . The sole according to  claim 1 , wherein the cushioning layer ( 2 ) has a hardness of 40 to 50 Asker C and/or wherein the base layer ( 3 ) has a hardness of 55 to 65 Asker C. 
     
     
         4 . The sole according to  claim 1 , wherein the thickness along the cushioning layer ( 2 ) in the a vertical direction (V) of the sole is greater than the thickness of the base layer ( 3 ) in the vertical direction (V) of the sole, in particular by at least 5 times, preferably by at least 10 times. 
     
     
         5 . The sole according to  claim 1 , wherein the channels ( 21 ,  22 ) are arranged in a lateral region of the midsole ( 1 ) in at least a first horizontal plane and a second horizontal plane, the first horizontal plane and second horizontal plane being offset from one another in the a vertical direction (V). 
     
     
         6 . The sole of  claim 5 , wherein the channels in the first horizontal plane are arranged relative to the channels in the second horizontal plane such that the channels ( 21 ) of the first horizontal plane are fully offset in the vertical direction (V) relative to the channels ( 22 ) of the second horizontal plane. 
     
     
         7 . The sole according to  claim 1 , wherein all channels ( 21 ,  22 ) in a lateral region of the midsole ( 1 ) are arranged in a single horizontal plane. 
     
     
         8 . The sole according to  claim 1 , wherein at least a part of the cushioning layer ( 2 ) is at least one of corrugated, wavelike, sinusoidal, and saw-toothed, in such a way that at least a part of the channels ( 21 ,  22 ) is formed by the resulting corrugation ( 23 ). 
     
     
         9 . The sole according to  claim 1 , wherein the midsole ( 1 ) additionally comprises a top layer ( 8 ), wherein the cushioning layer ( 2 ) is arranged in a vertical direction (V) between the top layer ( 8 ) and the base layer ( 3 ). 
     
     
         10 . The sole according to  claim 1 , wherein the sole comprises an outsole ( 4 ) arranged on the base layer ( 3 ). 
     
     
         11 . The sole according to  claim 1 , wherein at least part of the channels ( 21 ) are delimited by the cushioning layer ( 2 ) and the base layer 
     
     
         12 . The sole according to  claim 1 , wherein the cushioning layer ( 2 ) and/or the base layer ( 3 ) and/or the top layer ( 8 ) are made of at least one of a foamed polymer, in particular ethylene-vinyl acetate copolymer, thermoplastic polyurethane, polyamide, polyether block amide, polyethylene terephthalate, and of polybutylene terephthalate. 
     
     
         13 . The sole according to  claim 1 , wherein the channels ( 21 ,  22 ) are one of funnel-shaped, in particular trapezoidal, of V-shaped, and U-shaped in cross-section along the a longitudinal direction (L) and perpendicular to the a transverse direction (Q) of the midsole ( 1 ). 
     
     
         14 . The sole according to  claim 1 , wherein the base layer ( 3 ) has a thickness in the a vertical direction (V) of the sole of from 2 mm to 12 mm, in particular from 5 mm to 8 mm; and/or wherein the cushioning layer ( 2 ) has a thickness in the vertical direction (V) of the sole of from 3 mm to 35 mm, in particular from 6 mm to 24 mm. 
     
     
         15 . The sole according to  claim 1 , wherein each channel ( 21 ,  22 ) is delimited in the a longitudinal direction (L) by a front wall and a rear wall, respectively, the front wall and the rear wall converging towards each other. 
     
     
         16 . The sole according to  claim 1 , wherein the channels ( 21 ,  22 ) have lateral-side openings and wherein the portion of the open area formed by all channel openings to the closed area is 5% to 25%, preferably 10% to 25%. 
     
     
         17 . The sole according to  claim 1 , wherein the cushioning layer ( 2 ) has a peripherally circumferential folding edge ( 24 ) which is concave towards the outer surroundings. 
     
     
         18 . The sole according to  claim 1 , wherein the midsole ( 2 ) additionally comprises an elastic incompressible plate ( 7 ). 
     
     
         19 . The sole of  claim 18 , wherein the cushioning layer ( 2 ) is arranged in a vertical direction between the elastic incompressible plate ( 7 ) and the base layer ( 3 ); or wherein the elastic incompressible plate ( 7 ) is arranged in the vertical direction between the cushioning layer ( 2 ) and the base layer ( 3 ); or wherein the elastic incompressible plate ( 7 ) is arranged between the cushioning layer ( 2 ) and the top layer ( 8 ). 
     
     
         20 . The sole of  claim 18 , wherein the elastic incompressible plate ( 7 ) is fitted into the cushioning layer ( 2 ). 
     
     
         21 . A running shoe, in particular an athletics shoe, comprising a sole according to  claim 1 .