Patent ID: 7207125
Filing Date: 2007-04-24
Classification: A43B,B29D

Abstract:
1. A midsole insert for a shoe, comprising: a body having a heel portion, a midfoot portion, and a forefoot portion; a plurality of energy return grid systems located on the midsole insert, wherein each energy return grid system includes a plurality of openings through the midsole insert, forming a taut lattice pattern, which forms a spring-like member capable of deflection and return; wherein the midsole insert is constructed and arranged to attach directly to an upper during a manufacturing step, to secure the shape of the upper on a last; wherein a first grid system is located on the heel portion and a second grid system is located on the forefoot portion; wherein the midsole insert is formed of at least two materials having different hardnesses, such that a majority of the heel portion and midfoot portion have a greater hardness than the forefoot portion; and a third grid system located on the midfoot portion, wherein a portion of the third grid system has an increased thickness relative to a section of the midfoot portion without a grid system.