Patent ID: 8117766

Claim:
A device for utilization of energy generated by a body weight comprising: a sole of a flexible piece of a footwear, wherein the sole comprises a front section, a back section, and a middle section; a compression bellow (A) located in the front section of the sole, the compression bellow including a first end and a second end; a gaseous element admission valve (M) located in the first end of the compression bellow, wherein the gaseous admission valve admits a gaseous material into the compression bellow; a gaseous retaining valve (K) located in the second end the compression bellow; a retainer (B) located in the middle section of the sole; a first duct to flow the gaseous material from the compression bellow to the retainer (B); an expansion bellow (C) located in the back section of the sole, the compression bellow including a first end and a second end; a second duct located in the first end of the expansion bellow, wherein the second duct flows the gaseous material from the retainer (B) to the expansion bellow (C); a pressure driving retaining valve (P) located on the expansion below; a flush valve (T) located on the second end of the expansion bellow, wherein the flush valve is driven by the release of the pressure; wherein through the body weight on the back section of the sole the gaseous material is compress, the compression bellow (A) delivers the gaseous material to the retainer (B), retaining it therein through the gaseous retaining valve (K) and the pressure driving retaining valve (P), and displacing the body weight on the front section of the sole, drives the pressure driving retaining valve (P) of the retainer, releasing the compressed gas into the expansion bellow(C), expanding the expansion bellow (C), producing an expulsion force, forcing the opening of the flush valve (T), releasing the compressed gas and completing the cycle.