EP 2171270 A1 20100407 - WIND TURBINE BLADE
Title (en)
WIND TURBINE BLADE
Title (de)
WINDTURBINENBLATT
Title (fr)
PALE D'ÉOLIENNE
Publication
Application
Priority
- US 2008066556 W 20080611
- US 94362307 P 20070613
Abstract (en)
[origin: WO2008157174A1] A turbine blade (10) and turbine blade arrangement (5) for extracting energy from a moving fluid are described. A Savonius-type rotor assembly incorporates a turbine blade (10) and/or a turbine blade arrangement (5) where the blades (10, 10') may be twisted to generally form a helix. The cross sectional profile for the blades (10, 10') may represent an airfoil, and may be asymmetric. In some embodiments, the cross sectional profile remains substantially constant over the length of each blade (10,10'). Turbines utilizing the described blade (10) and blade arrangement (5) may be self starting and may have a relatively smooth torque profile throughout the entire rotational path. The blades (10, 10') and blade arrangement (5) may extract energy from a moving fluid through both lift and drag forces.
IPC 8 full level
F03D 11/00 (2006.01); F03D 3/06 (2006.01)
CPC (source: EP US)
F03D 3/061 (2013.01 - EP US); F05B 2240/213 (2013.01 - EP US); F05B 2240/30 (2013.01 - EP US); F05B 2240/301 (2013.01 - EP US); F05B 2250/25 (2013.01 - EP US); Y02E 10/74 (2013.01 - EP US)
Citation (search report)
See references of WO 2008157174A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2008157174 A1 20081224; CA 2690740 A1 20081224; CN 101779037 A 20100714; EP 2171270 A1 20100407; US 2010247320 A1 20100930
DOCDB simple family (application)
US 2008066556 W 20080611; CA 2690740 A 20080611; CN 200880102638 A 20080611; EP 08770707 A 20080611; US 60023308 A 20080611