Shock absorbing system for human feet

Claim 1

A Shock absorbing sole for footwear comprising: an upper half sole, a lower half sole and an elastic layer positioned between the half soles, the elastic layer having an upper surface and a lower surface; the upper half sole and the upper surface of the elastic layer forming two cavities therebetweem, said cavities contain a gas; the lower half sole and the lower surface of the elastic layer forming two cavities therebetween which are interconnected through a channel to permit liquid transfer between the two cavities formed in the lower half sole, said cavities in the lower half sole contain a liquid; the channel having a valve and a screw therein, wherein the flow of liquid is regulated between the cavities of the lower half sole by manually turning the screw to regulate the valve; whereby the elastic layer between the cavities of the upper and lower half soles acts as a diaphragm to absorb impact energy when the sole contacts the ground.