Patent ID: 6389713
Filing Date: 2002-05-21
Classification: A43B

Abstract:
A midsole assembly for an athletic shoe comprising:a midsole including an upper midsole that includes an upper midsole forefoot portion and an upper midsole heel portion, and a lower midsole that is arranged below said upper midsole and that includes a lower midsole forefoot portion and a lower midsole heel portion, wherein each of said portions is respectively made of a respective soft elastic material; and a corrugated sheet that is made of a plastic resin, is disposed in said midsole between said upper midsole forefoot portion and said lower midsole forefoot portion and between said upper midsole heel portion and said lower midsole heel portion, and has an upper corrugated surface surfacially joined to said upper midsole forefoot portion and said upper midsole heel portion and a lower corrugated surface surfacially joined to said lower midsole forefoot portion and said lower midsole heel portion; wherein said corrugated sheet has a wave configuration including wave crests and wave troughs respectively opposite each other on said upper corrugated surface and said lower corrugated surface; wherein at least one of said upper midsole forefoot portion and said upper midsole heel portion of said upper midsole has a first upper midsole hardness, at least one of said lower midsole forefoot portion and said lower midsole heel portion of said lower midsole has a first lower midsole hardness, and said first upper midsole hardness is different from said first lower midsole hardness; and wherein said corrugated sheet is harder than all of said portions of said midsole.