US Patent 7361999 Body-carrying human power generation system

A human power generation system includes a generation module and a generator. The generation module includes two speed-up great sets and a rack. Each speed-up gear set includes a shaft to which a pinion and a gear are coaxially mounted. The pinion of the first gear set engages the rack. The gear of the first gear set engages the pinion of the second gear set. The gear of the second gear set is drivingly coupled to the generator. Thus, by attaching the system to a wearer by a mounting device, the systems continuously operates by the natural activity of the wearer and the rack drives, through the gear sets, the generator to generate electrical power.