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US 5,685,092 AGranted
Physiological motion enhancing shoe sole
OwnerDavid W. Prieskorninventor
Life of this patent
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OwnerDavid W. Prieskorninventor
Estimating the term…
A shoe sole having upper and lower layers movable relative to one another in a manner which promotes physiologically desirable movements of the subtalar joint of a shoe wearer's foot and thereby aids in the absorption of shock forces occurring when the shoe strikes the ground during a walking or running stride. The lower layer has an upper surface inclined downward and toward the lateral side of the sole, and a resilient intermediate layer separates the upper and lower layers. Application of weight to the hindfoot section of the upper layer at heel strike forces that section downward and laterally relative to the lower layer, placing the lateral edge of the upper layer in close proximity with a vertically oriented fulcrum formed in an upturned lip on the lateral side of the lower layer. Transfer of weight to the forefoot as the running or walking stride continues causes the forefoot section of the upper layer to move downward and laterally, and the upper layer simultaneously rotates about its point of contact with the fulcrum to return the hindfoot region to its original position. The inward rotation of the foot as the as the hindfoot section moves laterally also encourages the screw home function of the knee to improve its stability and injury resistance.
An insole for a shoe comprising a lower layer and an upper layer disposed above the lower layer, each of the layers being substantially rigid and having a medial side, a lateral side, a forefoot section, a midfoot section and a hindfoot section, the upper layer being movable laterally and medially with respect to the lower layer, and the lower layer hindfoot section having an upper surface inclined downwardly and toward one of the sides of the lower layer over a substantial portion thereof, said one of the sides being designated a downslope side, whereby application of a downward force to the hindfoot section of the upper layer causes movement thereof of downward and toward the downslope side of the lower layer.
An insole for a shoe comprising:
An insole for a shoe, the sole comprising a lower layer and an upper layer disposed above the lower layer, each of the layers having a medial side, a lateral side, a forefoot section, a midfoot section and a hindfoot section, the lower layer having an upper surface inclined downwardly and toward the lateral side over substantial portions of its forefoot and hindfoot sections, and the lower layer further including a fulcrum at the lateral side of the midfoot section, whereby application of a downward force to the hindfoot section of the upper layer causes movement of the hindfoot section of the upper layer in a downward and lateral direction relative to the lower layer to place the upper and lower layers in interfering relationship with one another at the fulcrum, and whereby subsequent application of a downward force to the forefoot section of the upper layer causes a downward and lateral movement of the forefoot section of the upper layer relative to the lower layer, the downward and lateral movement of the forefoot section causing the upper layer to rotate in a substantially horizontal plane about the fulcrum such that the hindfoot portion of the upper layer moves upward and medially with respect to the lower layer.
Dependencies are inferred from the claim text.