Windmill

Details Windmill Windmill

1980-03-10

1981-04-07

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With means positioning fluid current driven impeller...

Feathering cycle related to flow direction

416109, 416119, F03D 706, F03D 306

Patent

active

042603285

ABSTRACT:
A vertical axis windmill, having a plurality of propelling blades, or vanes, supported in a vertical position by horizontal support bars extending outward from a rotatable tube concentric with a main support pipe. In operation the blades remain down-wind or at an angle to the wind, and are never flat side to the wind. A cam controlled by a wind vane operates a linkage that acts to position the blades to the proper angle. Each blade is supported on a shaft that has a crank arm attached, and a device is provided to rotate the arm past center. Spring pressure is equalized on the cam rollers to reduce the reaction of the cam on the wind vane. The blades are wind directional and act somewhat as a wind vane. As the wind load on a blade increases, the angle of the blade changes and the blade adjusts itself to maintain a regulated rotating speed for the windmill.

REFERENCES:
patent: 61530 (1867-01-01), Fowler
patent: 1714808 (1929-05-01), Oliphant
patent: 2107690 (1938-02-01), Clark
patent: 2171732 (1939-09-01), Michaelson et al.
patent: 3382931 (1968-05-01), Pontcarral et al.
patent: 4203707 (1980-05-01), Stepp

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