(19)

(11)

EP 4 263 343 A1

(12)

(43) Date of publication: 25.10.2023 Bulletin 2023/43 (21) Application number: 21819532.9 (22) Date of filing: 22.11.2021

(51) International Patent Classification (IPC):  B63H 1/20(2006.01) B63H 5/07(2006.01) (52) Cooperative Patent Classification (CPC): B63H 1/20; B63H 5/07 (86) International application number: PCT/FI2021/050798 (87) International publication number: WO 2022/129676 (23.06.2022 Gazette 2022/25)

(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: 18.12.2020 FI 20206333 (71) Applicant: Aker Arctic Technology Oy 00980 Helsinki (FI)	(72) Inventors: LINDROOS, Juuso 00500 Helsinki (FI) VALTONEN, Ville 00910 Helsinki (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)