Fluid reaction surfaces (i.e. – impellers) – With means positioning fluid current driven impeller... – Offset relative to flow direction
Patent
1987-12-07
1988-11-29
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
With means positioning fluid current driven impeller...
Offset relative to flow direction
415 13, F03D 704
Patent
active
047878193
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.
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Lemon Francis W.
Powell Jr. Everette A.
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