Patent ID: 11933271
Assignee: nan
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 12:
13. A vertical axis windmill turbine, comprising:
a support structure for supporting the vertical axis windmill turbine above ground level;
at least one rotor for rotating upon the support structure, the at least one rotor comprising a horizontal structure having a rotational axis perpendicular to the ground level;
a plurality of blades positioned within each of the at least one rotor for causing the at least one rotor to rotate on the support structure responsive to wind force;
a plurality of vanes located on each of the plurality of blades, the plurality of vanes rotating between an open position and a closed position responsive to a wind force, wherein an angle between the open position and the closed position comprises approximately 180°;
a plurality of hinges, each of the hinges connecting a vane of the plurality of vanes to a blade of the plurality of blades, wherein the plurality of hinges have a biasing force applied thereto to slow movement of the connected vane when approaching a 0° position and 180° position;
wherein each of the plurality of hinges further comprises a leaf spring connecting a structure of the blade with the vane, the leaf spring applying a first biasing force when the vane pivots toward the 0° position to stop the movement of the vane and applying a second biasing force when the vane pivots toward the 180° position to stop the movement of the vane;
wherein the plurality of vanes further comprises:
a first stop bar associated with each of the plurality of vanes, the first stop bar located along the vane at a predetermined distance from an end of the blade at the 0° position of the vane; and
a second stop bar associated with each of the plurality of vanes, the second stop bar located along the vane at a predetermined distance from an end of the blade at the 180° position of the vane;

a plurality of vane stops associated with each of the first stop bar to prevent the vane from moving past approximately 0° and the second stop bar to prevent the vane from moving past approximately the 180° position.