Patent ID: 6647646
Filing Date: 2003-11-18
Classification: A43B

Abstract:
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.