Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Responsive to gravity or working fluid force
Patent
1978-10-24
1984-07-03
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Sustained ancillary movement of rotary working member
Responsive to gravity or working fluid force
416132B, F03D 706
Patent
active
044576692
ABSTRACT:
A sail-type windmill providing high torque without limitations to size. Three sails are mounted to a frame for rotation about an axis generally parallel to the planes of the sails. In one version, the sails are flexible and sheets are provided for mounting the sails. Roller reefing is provided for modifying the effective area each sail member presents to the wind, including a spring biased weight associated with each sail and a line extending from the weight for effecting take-up and let-out of the sail and the sheet in response to radial movement of the weight. In another version, the sails are of metal and speed governing is provided by hydraulic cylinders operatively mounted to the sails for pivoting them about their axes of rotation, the hydraulic cylinders controlled by a aerometer mounted atop the windmill. The frame structure of the windmill can be mounted for rotation about a central shaft, or about a circular track with rollers from the frame engaging the circular track, and a power takeoff being associated with the circular track.
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