(19)

(11)

EP 3 717 769 A1

(12)

(43) Date of publication: 07.10.2020 Bulletin 2020/41 (21) Application number: 18812052.1 (22) Date of filing: 27.11.2018

(51) International Patent Classification (IPC):  F03D 7/02(2006.01) F03D 1/06(2006.01) (86) International application number: PCT/DK2018/050314 (87) International publication number: WO 2019/105517 (06.06.2019 Gazette 2019/23)

(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 RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 01.12.2017 DK PA201770903 (71) Applicant: Vestas Wind Systems A/S 8200 Aarhus N (DK)	(72) Inventor: SMITH, Jonathan Burridge Hampshire SO31 1BL (GB) (74) Representative: Vestas Patents Department  Hedeager 42 8200 Aarhus N 8200 Aarhus N (DK)