Shoe with arch reinforcement
AssigneeAsics Corporation
InventorsShigeyuki Mitsui, Tsuyoshi Nishiwaki, Noboru Nakabe, Masashi Isobe
Life of this patent
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Abstract
Disclosed is a shoe sole comprising an outer sole 1F, 1B, a midsole 2 and a reinforcement device 4 made of a resin plate. The reinforcement device 4 is firmly secured to the underside of an arch portion 2M of the midsole 2. At a medial side 11 and a lateral side 10 of the foot, the reinforcement device 4 is shaped like an arch between separated outer sole parts 1F and 1B. A medial foot portion 43 of the reinforcement device 4 is formed to have a higher hardness than a lateral foot portion 40 of the reinforcement device 4. This allows the reinforcement device 4 to have a greater flexural rigidity in its medial foot portion 43 than in its lateral foot portion 40.
Claims7
A shoe sole comprising:
- outer sole having a tread face and divided by an arch portion into a forefoot portion and a rear foot portion which are spaced from each other;
- a midsole formed on top of the outer sole over the forefoot portion, the arch portion, and the rear foot portion;
- and
- a reinforcement device made of a resin plate having a first face and a second face, the first face of the reinforcement device fixed firmly to a bottom face of the arch portion of the midsole,
- wherein the second face of the reinforcement device between the forefoot portion and the rear foot portion of the outer sole is spaced from the ground, whereby the second face, together with the ground, forms a hollow, extending through from a medial side of a foot to a lateral side of the foot between the forefoot portion and the rear foot portion of the outer sole, and wherein
- hardness in a medial side portion of the foot of the reinforcement device is established to be higher than that in a lateral side portion of the foot of the reinforcement device so that flexural rigidity in the medial side portion of the foot of the reinforcement device is higher than that in the lateral side portion of the foot of the reinforcement device.
A shoe sole comprising:
- an outer sole having a tread face and divided by an arch portion into a forefoot portion and a rear foot portion which are spaced from each other;
- a midsole formed on top of the outer sole over the forefoot portion, the arch portion, and the rear foot portion;
- and
- a reinforcement device made of a resin plate having a first face and a second face, the first face of the reinforcement device fixed firmly to a bottom face of the arch portion of the midsole,
- wherein the second face of the reinforcement device between the forefoot portion and the rear foot portion of the outer sole is formed in an arch at a lateral and a medial side of a foot and spaced from the ground,
- whereby the second face, together with the ground, forms a hollow, extending through from the medial side of the foot to the lateral side of the foot between the forefoot portion and the rear foot portion of the outer sole, and wherein
- hardness in a medial side portion of the foot of the reinforcement device is established to be higher than that in a lateral side portion of the foot of the reinforcement device so that flexural rigidity in the medial side portion of the foot of the reinforcement device is higher than that in the lateral side portion of the foot of the reinforcement device.
Dependencies are inferred from the claim text.