A shock absorption and energy return assembly for increasing the overall performance of a shoe by increasing the stability and shock absorption of the heel. The inventive device includes a lower guide member having a plurality of lower apertures and lower spring retainers, an upper guide member having...http://www.google.fr/patents/US6055747?utm_source=gb-gplus-shareBrevet US6055747 - Shock absorption and energy return assembly for shoes
Shock absorption and energy return assembly for shoes
