Abstract: A windmill device is provided having a windmill tail pivotally attached to a rear end of the fan or rotor assembly, to swing upwardly from alignment therewith, a laterally extending arm attached to the fan assembly to pivot therewith, and a depending flap vane hingedly attached at the top to a portion of the arm outside the wake thereof and urged to tilt forwardly in a downward direction towards the wind. The flap vane gradually swings the fan assembly away from pointing into the wind as the wind speed increases until a predetermined wind speed is reached when the fan assembly is held out of the wind with the arm extending parallel with the tail. A rear vane may be provided attached to the flap vane and forming an inverted V-shape therewith. An intermediate vane may also be provided extending downwardly between the flap vane and the rear vane.

Abstract: A windmill is provided having a flywheel attached to the fan shaft and an upwardly extending crank link which is cranked by crank pin mounted off-center on the face of the flywheel. The crank link rocks a rocker beam which may, for example, actuate a pump. The crank link and pump are pivotably attached by sleeves on the rocker beam whereby the amplitude of the rocking motion imparted to the beam and the pump may be adjusted by adjusting the positin of the sleeves along the beam. Counterweights may be provided on the rocker beam for giving the crank link a pulling or a pushing function.