Patent ID: 6688925
Filing Date: 2004-02-10
Classification: F03B,F03D,F05B,Y02E

Abstract:
A mechanism adapted to be placed in a flow of fluid comprising:two wheels mounted parallel on a drive shaft and separated a predetermined distance; four wings rotatably mounted inside the wheels, said wings mounted intermediate the wheels at zero, ninety, one hundred eighty, and two hundred seventy degrees about a circumference of the wheels, said wings respectively rotatable about wing axes through the longitudinal center of the wings; sprocket wheels connected to each of the wings at ends extending past one of the two wheels; a chain coupling the sprocket wheels together wherein when one wing moves the other three move at the same pace, wherein an angular position of any of the four wings is maintained with adjacent wings angled at forty five degrees relative to the adjacent wings, and a driven sprocket having twice as many teeth as the sprocket wheels, said drive sprocket securely connected to one of the wings, wherein when the sprocket wheels and drive shaft rotate clockwise, the wings each rotate counter-clockwise about their respective wing axes at exactly half the speed of rotation of the sprocket wheels and drive shaft; and a downwardly directed tube supporting the wheels and wings, said tube rotatable about a tube axis; and a tail assembly having a tail preferential pointed toward a direction of fluid flow, and flaps operably coupled to the tube wherein as the speed of the fluid flow increases, the flaps move under the force of the fluid thereby rotating the tube about the tube axis, and thus the tube, wheels and wings up to ninety degrees from the direction of fluid flow under predetermined fluid flow speed conditions.