Footwear sole sections including bladders with internal flexibility sipes therebetween and an attachment between sipe surfaces

摘要

A shoe or other footwear, including a footwear or orthotic sole, including a sole section with an outer bladder having a uppermost surface curved concavely in a U-shape relative to an intended wearer's foot location in the device, as viewed upright and unloaded in a frontal plane. The outer bladder forms a component of the sole section. An inner bladder includes a gas located inside and is substantially surrounded on at least the top, bottom and sides by the outer bladder. The outer bladder and inner bladder are separated by an internal sipe. The sipe is formed by an inner surface of the outer bladder and an outer surface of the inner bladder. An attachment is provided between the surfaces of the sipe and located in an upper, central portion of the sipe between sidemost extents of the outer surface of the inner bladder, viewed in a frontal plane cross-section.