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(11)

EP 4 562 295 A1

(12)

(43) Date of publication: 04.06.2025 Bulletin 2025/23 (21) Application number: 23739370.7 (22) Date of filing: 23.06.2023

(51) International Patent Classification (IPC):  F03C 1/06(2006.01) F04B 1/20(2020.01) F04B 49/06(2006.01) F03C 1/40(2006.01) F04B 1/324(2020.01) (52) Cooperative Patent Classification (CPC): F04B 1/20; F04B 1/324; F04B 49/06; F04B 2201/12041; F03C 1/0636; F03C 1/0686 (86) International application number: PCT/IB2023/056498 (87) International publication number: WO 2024/023604 (01.02.2024 Gazette 2024/05)

(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: KH MA MD TN (30) Priority: 25.07.2022 IT 202200015621 (71) Applicant: Casappa S.p.A. 43044 Collecchio (Parma) (IT)	(72) Inventors: LETTINI, Antonio 43123 PARMA (IT) GUIDETTI, Marco 43123 PARMA (IT) FANIGLIULO, Alessandro 43036 FIDENZA (PARMA) (IT) (74) Representative: Monelli, Alberto  Bugnion S.p.A. Largo Michele Novaro 1/A 43121 Parma 43121 Parma (IT)