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(11)

EP 4 367 402 A1

(12)

(43) Date of publication: 15.05.2024 Bulletin 2024/20 (21) Application number: 22741150.1 (22) Date of filing: 30.06.2022

(51) International Patent Classification (IPC):  F04D 17/12(2006.01) F04D 19/02(2006.01) F04D 25/16(2006.01) (52) Cooperative Patent Classification (CPC): F04D 25/163; F04D 19/00; F04D 19/02; F04D 17/12 (86) International application number: PCT/EP2022/025301 (87) International publication number: WO 2023/280435 (12.01.2023 Gazette 2023/02)

(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: 08.07.2021 IT 202100017996 (71) Applicant: Nuovo Pignone Tecnologie S.r.l. 50127 Florence (IT)	(72) Inventors: GRIMALDI, Angelo 50127 Firenze (IT) CANGIOLI, Francesco 50127 Firenze (IT) GUGLIELMO, Alberto 50127 Firenze (IT) (74) Representative: Illingworth-Law, William Illingworth  Baker Hughes 245 Hammersmith Chalk Hill Road London W6 8DW London W6 8DW (GB)