Patent ID: 7891453

Claim:
A system for storing and delivering energy to an energy conversion device, the system comprising: a frame; a vessel moveable between a first volume and a second volume larger than the first volume upon receiving a hydraulic fluid at a first pressure, the vessel including a stretchable sidewall configured to urge the hydraulic fluid therefrom, the stretchable sidewall of the vessel also forming a portion of the frame; a hydraulic machine mechanically associated with the frame and connectable with the vessel for receiving therefrom the hydraulic fluid at the first pressure, the hydraulic machine being mechanically connectable to the energy conversion device, the hydraulic machine being operable to receive the hydraulic fluid at the first pressure and deliver energy to the energy conversion device; and a reservoir mechanically associated with the frame and connectable with the hydraulic machine to receive therefrom hydraulic fluid at a second pressure that is less than the first pressure.