NIKE, Inc.
Sole structure for an article of footwear having a nonlinear bending stiffness

Abstract:

A sole structure for an article of footwear comprises a first sole plate with a foot-receiving surface, a ground-facing surface opposite the foot-receiving surface, and an opening in the ground facing surface extending at least partway through the first sole plate and from a lateral side to a medial side of the first sole plate in a forefoot region. The first sole plate has a first wall at a forward extent of the opening, a second wall at a rear extent of the opening, and at least one tensile member disposed in the opening. The tensile member has a forward end fixed to the first wall, a rear end fixed to the second wall. A midportion of the at least one tensile member is transversely offset from both the forward end and the rear end by a first offset distance when the sole structure is in an unflexed, relaxed state.