Eccentric Toe-Off Cam Lever
OwnerJohn E. Cobbinventor
Life of this patent
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Abstract
A sole system which allows plantarflexion and dorsiflexion in the running/walking gait; provides a mechanical advantage through articulation of the forefoot to stimulate an upward plantar moment force during toe-off; and increases the distance per step without altering the stride pattern. An embodiment of the current invention comprises an eccentric toe-off cam lever (“cam lever”) integrated into the midsole of a shoe. The cam lever of the embodiment comprises: a distal longitudinally extending cam element; a forefoot fulcrum element; and a rear longitudinally extending cam element.
Claims50
A sole system comprising an eccentric toe-off cam lever integrated into a shoe, substantially and as described.
The sole system of claim, wherein said cam lever traverses from the medial to the lateral side of the foot, and forms a lower concavity for the resting portion of the foot when view from a frontal perspective.
A sole system comprising an eccentric cam integrated into a shoe, with an offset center position, utilizing the remaining portion of the shoe and foot as follower, allowing the radial rotation across the lower eccentric cam surface to be transformed into linear motion relative to a fixed point on the dorsal side of the foot.
A sole system comprising a lever integrated into the sole of a shoe, including one or more curvilinear convex portions, said lever having a fulcrum element positioned near the ball of the foot, and said lever longitudinally configured to allow downward force applied distal to said fulcrum element and upward force proximal to said fulcrum element against a lower plantar surface.
Dependencies are inferred from the claim text.