(19)

(11)

EP 4 771 285 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24787231.0 (22) Date of filing: 30.08.2024

(51) International Patent Classification (IPC):  F04D 27/00(2006.01) F04D 29/58(2006.01) F04D 27/02(2006.01) (52) Cooperative Patent Classification (CPC): F04D 27/02; F04D 27/001; F04D 29/584; F05D 2260/80; F05D 2260/81; F05D 2260/82; F05D 2260/821; F04C 28/00; F04C 29/04 (86) International application number: PCT/IB2024/058456 (87) International publication number: WO 2025/046531 (06.03.2025 Gazette 2025/10)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 31.08.2023 BE 202305723 (71) Applicant: Atlas Copco Airpower, Naamloze Vennootschap 2610 Wilrijk (BE)	(72) Inventors: GEUENS, Philippe 2610 Wilrijk (BE) HILLEN, Michel 2610 WILRJK (BE) LOUARROUDI, Ebrahim 2610 Wilrijk (BE) VANDE SANDE, Hans 2610 Wilrijk (BE) (74) Representative: Atlas Copco Airpower IP department  Airtec Division P.O. Box 101 Boomsesteenweeg 957 2610 Wilrijk 2610 Wilrijk (BE)