(19)

(11)

EP 2 438 300 A2

(12)

(88) Date of publication A3: 05.05.2011 (43) Date of publication: 11.04.2012 Bulletin 2012/15 (21) Application number: 10726026.7 (22) Date of filing: 28.05.2010

(51) International Patent Classification (IPC):  F03D 7/04(2006.01) (86) International application number: PCT/EP2010/057382 (87) International publication number: WO 2010/139613 (09.12.2010 Gazette 2010/49)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 03.06.2009 DK 200900695 03.06.2009 US 183691 P (71) Applicant: Vestas Wind Systems A/S 8200 Aarhus N (DK)	(72) Inventor: BENGTSON, John DK-8270 Højbjerg (DK)