Variable diameter wind turbine rotor blades

Prime-mover dynamo plants – Fluid-current motors – Wind

Reexamination Certificate

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Details

C290S044000, C415S002100, C415S004500, C416S001000, C416S087000, C416S089000

Reexamination Certificate

active

06972498

ABSTRACT:
A system and method for changing wind turbine rotor diameters to meet changing wind speeds and control system loads is disclosed. The rotor blades on the wind turbine are able to adjust length by extensions nested within or containing the base blade. The blades can have more than one extension in a variety of configurations. A cable winching system, a hydraulic system, a pneumatic system, inflatable or elastic extensions, and a spring-loaded jack knife deployment are some of the methods of adjustment. The extension is also protected from lightning by a grounding system.

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PCT Search Report for international application No. PCT/JP01/02425 (1 page and English translation).
PCT Search Report for international application No. PCT/US 03/23748 (14pages).

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