NIKE, Inc.
VARIABLE STIFFNESS MIDSOLE FOR ARTICLE OF FOOTWEAR

Abstract:

A sole structure for an article of footwear includes a bladder having a first barrier element attached to a second barrier element to define a chamber including an interior void containing a compressible fluid, a pressure of the compressible fluid being adjustable to selectively adjust a position of the first barrier element relative to the second barrier element. In addition, the sole structure includes a first plate attached to the first barrier element and a second plate attached to the second barrier element on an opposite side of the bladder than the first plate.