Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Responsive to gravity or working fluid force
Patent
1975-02-10
1979-12-25
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Sustained ancillary movement of rotary working member
Responsive to gravity or working fluid force
416140, F03D 306
Patent
active
041803671
ABSTRACT:
A wind turbine apparatus in which a plurality of wind responsive elements are movably mounted, such as by being pivotally mounted, on a movable means which produces rotary motion. The positions of the wind responsive elements are arranged to provide a drag force on at least one of the elements in response to the wind when the speed of rotary motion is below a predetermined level so as to produce a starting force to initiate and maintain the rotary motion. When the speed of the rotary motion exceeds such predetermined level the positions of such wind responsive elements are such that a lift force is provided thereon in response to the wind so that the rotary motion can achieve speeds which are considerably higher than those achieved by the starting force.
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O'Connell Robert F.
Powell Jr. Everette A.
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