Midsole including cushioning structure
AssigneeAsics Corporation
InventorsTsuyoshi Nishiwaki, Toshikazu Kayano, Shigeyuki Mitsui
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Abstract
A midsole includes a thick plate-shaped or column-shaped cushioning portion. A plurality of grooves is formed on an outer peripheral surface of the cushioning portion. The respective grooves are helically formed around a substantially vertical line. The respective grooves are arranged substantially parallel with each other. A range α in which each of the grooves is formed is larger than a range of 15 degrees around the axial line and is smaller than a range of 180 degrees around the axial line.
Claims4
A midsole including a cushioning structure, which is provided between an outer sole and an upper and is suitable for absorbing a shock of landing, wherein:
- the cushioning structure comprises a thick plate-shaped or column-shaped cushioning portion;
- a plurality of grooves are helically formed on an outer peripheral surface of the cushioning portion, the grooves not being continuous with each other;
- each of the grooves has substantially a same lead angle between the grooves and a horizontal plane;
- in the cushioning member projected on the horizontal plane, each of the grooves subtends an arc of more than 15 degrees and less than 180 degrees with respect to a center of the projected cushioning member.
A midsole including a cushioning structure, which is provided between an outer sole and an upper and is suitable for absorbing a shock of landing, wherein:
- the cushioning structure comprises a column-shaped or thick plate-shaped cushioning portion;
- a plurality of grooves are helically formed on an outer peripheral surface of the cushioning portion, the grooves not being continuous with each other;
- the cushioning member includes a bottom surface, the bottom surface lying on a horizontal plane and having a center on the horizontal plane inside a outline of the bottom surface;
- each of the grooves has substantially a same lead angle between the groove and the bottom surface;
- each of the grooves subtends an arc of more than 15 degrees and less than 180 degrees with respect to the center of the bottom surface.
Dependencies are inferred from the claim text.