Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller...
Patent
1982-06-08
1984-03-27
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
416135, 416202, 416 44, F03D 704
Patent
active
044391080
ABSTRACT:
A windmill including a hub, at least a pair of rotor roots rotatably coupled to the hub and rotor blades mounted on respective rotor roots, wherein wind forces produce rotation of the blades, the roots and the hub around an axis of rotation passing through the hub and the hub defines a plane of rotation perpendicular to the axis of rotation. Each rotor root is mounted in an initial position at a predetermined compound angle with respect to the axis of rotation and the plane of rotation. The rotor roots are spring biased in an initial position and are coupled to each other and to the hub by means of a spring and linkage members disposed in the hub. Upon rotation of the rotors, centrifugal force acts on the rotors in opposition to the spring biasing and produces synchronous rotation of the blade roots relative to the axis of rotation and the plane of rotation thereby decreasing the pitch of the blades with respect to the wind direction and correspondingly controlling the speed of rotation of the rotors.
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