Fluid reaction surfaces (i.e. – impellers) – With means moving working fluid deflecting working member...
Reexamination Certificate
2007-11-13
2007-11-13
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With means moving working fluid deflecting working member...
C416S041000
Reexamination Certificate
active
10555579
ABSTRACT:
Wind turbine blade (10) including adjustable lift-regulating means (12, 13, 15, 17, 19, 21) arranged on or at the surface of the wind turbine blade (10), said lift-regulating means being provided with activating means by means of which they can be adjusted and thus alter the aerodynamic properties of the blade (10). The lift-regulating means (12, 13, 15, 17, 19, 21) and the activating means are adapted and arranged such that by activation of the activating means, the lift can be reduced in a zone extending in the longitudinal direction of the blade (10) from a first position adjacent the blade tip (14) to a second position between the position and the blade root (16) and this second position is variable in the longitudinal direction of the blade (10) by adjusting activate means. The lift-regulating means are formed of at least one flexible flap (12, 13, 15, 17, 19, 21). The invention further relates to a wind turbine rotor including such wind turbine blades, to a wind turbine and to a method of controlling the wind turbine.
REFERENCES:
patent: 2622686 (1952-12-01), Chevreau et al.
patent: 4692095 (1987-09-01), Lawson-Tancred
patent: 6361275 (2002-03-01), Wobben
patent: 2004/0067134 (2004-04-01), Beauchamp et al.
patent: WO97/01709 (1997-01-01), None
Frydendal Ib
Grabau Peter
Pedersen Bernt Ebbe
Vestergaard Jørgen Dahl
Cooper & Dunham LLP
LM Glasfibeer A/S
Look Edward K.
White Dwayne J
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