Article of footwear for more efficient running

Details Article of footwear for more efficient running Article of footwear for more efficient running

A - Human Necessities

43

B

A43B 5/06 (2006.01) A43B 13/14 (2006.01) A43B 13/38 (2006.01)

Patent

CA 2180720

An article of footwear (10) having an initial contact portion (30) and a medial/forefoot portion (34). The initial contact portion (30) exterior sole surface is formed at a dihedral angle (38) to the sole surface of the medial/forefoot portion (34) such that the heel portion has a minimal thickness of material interposed between the foot (32) and the ground surface (40) at a postero-lateral edge of the sole structure, which means that foot flight continues until the foot moves closer to the ground (40) to delay impact and increase stride length. A high friction interface (72, 172) is provided in a medial/forefoot portion of a shoe insole and low friction interface (74, 174) is provided at the initial contact portion (30) of the shoe insole. The low friction area (72) reduces sharing on foot impact, and the high friction forefoot interface (72, 172) eliminates sliding of the forefoot during foot push-off, to decrease wasted energy. Energy efficient and stride length increase are achieved.

Chaussure (10) présentant une portion de contact initial (30) et une portion médiane de l'avant-pied (34). La surface de la semelle de la portion de contact initial (30) forme un dièdre (38) avec la surface de la semelle de la portion médiane de l'avant-pied, si bien que pour le talon, l'épaisseur de matériau séparant le pied (32) du sol (40) est minime au niveau du bord postéro-latéral de la semelle, ce qui signifie que le vol du pied continue jusqu'à ce que le pied se rapproche du sol (40), ce qui retarde l'impact au sol et accroît la foulée. Une interface à frottement élevé (72, 172) est prévue dans la portion médiane de l'avant-pied (34) de la semelle intérieure tandis qu'une interface à faible frottement (74, 174) est prévue dans la portion de contact initial (30) de la semelle intérieure. La zone de faible frottement (72) réduit le cisaillement lors de l'impact du pied, tandis que l'interface à frottement élevé de l'avant-pied (72, 172) élimine le glissement de l'avant-pied lors de la poussée du pied, ce qui réduit les pertes d'énergie. On obtient donc une meilleure utilisation de l'énergie et un allongement de la foulée.

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