(19)

(11)

EP 2 307 639 A2

(12)

(88) Date of publication A3: 29.04.2010 (43) Date of publication: 13.04.2011 Bulletin 2011/15 (21) Application number: 09737765.9 (22) Date of filing: 30.04.2009

(51) International Patent Classification (IPC):  E04H 12/08(2006.01) F16L 23/036(2006.01) F16L 23/02(2006.01) (86) International application number: PCT/DK2009/050103 (87) International publication number: WO 2009/132659 (05.11.2009 Gazette 2009/45)

(84) Designated Contracting States: 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 TR Designated Extension States: AL BA RS (30) Priority: 02.05.2008 DK 200800626 (71) Applicant: Vestas Wind Systems A/S 8940 Randers - SV (DK)	(72) Inventor: ROSENGREN, Jesper Stærke DK-7300 Jelling (DK) (74) Representative: Plougmann & Vingtoft A/S  Sundkrogsgade 9 P.O. Box 831 2100 Copenhagen Ø 2100 Copenhagen Ø (DK)