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US 2008/0075595 A1Published application
Cross Flow Twist Turbine
OwnerGordon Proveninventor
Life of this patent
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Abstract
A cross flow turbine having one or more aerofoil blades rotatably mounted about a central axis and connected to said axis at or near each end of the one or more blades. The blades have a degree of torsional flexibility that make them twistable about the longitudinal blade axis to reduce the aerodynamic efficiency of the blades to control the rotational speed of the turbine. The twist of the blades can be actively controlled by means of a spring, other mechanical actuator or motor.
Claims36
A cross flow turbine comprising:
- one or more aerofoil blades rotatably mounted about a central axis and connected to said axis at or near each end of the one or more blades
- wherein said one or more blades are provided with a degree of torsional flexibility such that they are twistable about a longitudinal blade axis to reduce the aerodynamic efficiency of the one or more blades to control the rotational speed of the turbine.
A cross flow turbine comprising:
- one or more aerofoil blades rotatably mounted about a central axis and connected to the central axis at or near each end of the one or more blades by connection means wherein the connection means provided at one end of the one or more blades is releasably connectable and is released when speed of rotation of the turbine about the central axis increases to or over a predetermined threshold level.
Dependencies are inferred from the claim text.