Patent ID: 7791213

Claim:
An apparatus for converting vertical up and down motion to unidirectional rotational force for generating power, comprising: a) a platform; b) a vertical support structure fixed to the ground; c) a single power shaft attached rotatably to said platform; d) first and second one-way clutches both fixed directly to said single power shaft, said one-way clutches each having an outer casing; e) a sprocket or pulley fixed to each outer casing, and said sprocket or pulley attached rotatably to said single power shaft; f) a first chain, belt, or cable having a first end attached directly to the ground or to said vertical support structure at a position below said platform and said single power shaft, and having a second opposite end extending upward over said sprocket or pulley on said first one-way clutch and extending downward therefrom; g) a second chain, belt, or cable having a first end attached directly to said vertical support structure at a position above said platform and said single power shaft, and having a second opposite end extending downward under said sprocket or pulley on said second one-way clutch and extending upward therefrom and over an idler pulley attached to said vertical support structure at a position above said platform and said single power shaft, and extending downward therefrom, wherein said first chain, belt, or cable drives said first one-way clutch to rotate said single power shaft, and said second chain, belt, or cable drives said second one-way clutch to rotate the same said single shaft; h) said first clutch engaging said single power shaft by means of said first chain, belt, or cable as said platform is raised upward, thereby rotating said single power shaft in a fixed direction while said second clutch is disengaged from said single power shaft; i) said second clutch engaging said single power shaft by means of said second chain, belt, or cable as said platform is lowered downward, thereby rotating said single power shaft in said fixed direction while said first clutch is disengaged from said single power shaft; and j) said single power shaft rotating in said fixed direction by the action of said first and second one-way clutches attached thereto as said platform moves up and down, thereby providing unidirectional rotational force in said single power shaft to drive a generator.