An article of footwear has an upper and a sole. The sole has an upper sole member, a lower sole member, and at least one inflatable bladder disposed between the upper sole member and the lower sole member. The at least one inflatable bladder has an inflated state and a deflated state. A distance between...http://www.google.es/patents/US7694438?utm_source=gb-gplus-sharePatente US7694438 - Article of footwear having an adjustable ride
