Blade for wind turbine

Details Blade for wind turbine Blade for wind turbine

2005-07-13

2008-10-14

Look, Edward (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Apertured or permeable

C416S232000, C415S081000

Reexamination Certificate

active

07435057

ABSTRACT:
A blade for a wind turbine includes a device for causing air at an increased velocity and/or pressure to escape from exit openings in the blade, thereby to apply a force. Pressure and diameter adjustable valves may be provided at each exit opening or orifice to allow the air to exit from the blade only when the air pressure within the blade exceeds a preset level. Also disclosed is the provision of valves at the exit openings or orifices on an opposite edge of the blade that allows air to escape from the blade to slow down but not stop rotation of the blade when a dangerous wind condition is detected.

REFERENCES:
patent: 4596512 (1986-06-01), Krauss et al.
patent: 5226805 (1993-07-01), Proven
patent: 2004/0031321 (2004-02-01), Orsat
patent: 2004/0201220 (2004-10-01), Andersen et al.

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