A structure forming part of a shoe comprising a sealed member of elastomeric material having a plurality of chambers containing a fluid, the chamber having a generally planar alignment, the plurality of chambers interconnected by a plurality of flexible sheets, wherein at least a portion of...http://www.google.co.uk/patents/US5686167?utm_source=gb-gplus-sharePatent US5686167 - Fatigue resistant fluid containing cushioning device for articles of footwear 
