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EP 4 118 324 A1

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(43) Date of publication: 18.01.2023 Bulletin 2023/03 (21) Application number: 21714310.6 (22) Date of filing: 12.03.2021

(51) International Patent Classification (IPC):  F03D 1/02(2006.01) F03D 17/00(2016.01) F03D 7/02(2006.01) (52) Cooperative Patent Classification (CPC): F03D 7/0204; F03D 17/00; F03D 1/02; Y02E 10/72 (86) International application number: PCT/DK2021/050081 (87) International publication number: WO 2021/180291 (16.09.2021 Gazette 2021/37)

(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: 13.03.2020 DK PA202070169 (71) Applicant: VESTAS WIND SYSTEMS A/S 8200 Aarhus N (DK)	(72) Inventors: BAUN, Torben Ladegaard 8541 Skødstrup (DK) NETO, Julio Xavier Vianna 8200 Århus N (DK) NEUBAUER, Jesper Lykkegaard 8543 Hornslet (DK) FYNBO, Peter 8950 Ørsted (DK) DALSGAARD, Søren 8370 Hadsten (DK) WOLLESEN, Anders Yde 8000 Århus C (DK) JØRGENSEN, Brian 8464 Galten (DK) (74) Representative: Vestas Patents Department  Hedeager 42 8200 Aarhus N 8200 Aarhus N (DK)