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(11)

EP 4 581 274 A1

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(43) Date of publication: 09.07.2025 Bulletin 2025/28 (21) Application number: 22769314.0 (22) Date of filing: 02.09.2022

(51) International Patent Classification (IPC):  F04D 1/00(2006.01) F04D 29/42(2006.01) F01P 5/10(2006.01) F04D 29/049(2006.01) F04D 29/62(2006.01) F01P 7/16(2006.01) (52) Cooperative Patent Classification (CPC): F04D 29/4293; F04D 29/049; F04D 1/006; F01P 5/10; F01P 7/165; F04D 29/628; F01P 3/20 (86) International application number: PCT/FI2022/050579 (87) International publication number: WO 2024/047275 (07.03.2024 Gazette 2024/10)

(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 (71) Applicant: Wärtsilä Finland Oy 65170 Vaasa (FI)	(72) Inventors: VIITALA, Marko 65170 Vaasa (FI) HYÖTY, Ilari 65170 Vaasa (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)