(19)

(11)

EP 4 217 663 A1

(12)

(43) Date of publication: 02.08.2023 Bulletin 2023/31 (21) Application number: 21786267.1 (22) Date of filing: 22.09.2021

(51) International Patent Classification (IPC):  F24F 7/00(2021.01) F24F 7/007(2006.01) F04D 25/06(2006.01) F24F 13/32(2006.01) F04B 17/00(2006.01) F04D 25/08(2006.01) (52) Cooperative Patent Classification (CPC): F24F 13/32; F24F 2221/36; F24F 2221/38; F24F 2013/205; F24F 7/007; F24F 2005/0067; F24F 2221/10; A45B 2023/0093; A45B 2200/1027; A45B 2200/1036; A45B 2023/0087; F04D 25/084; F04D 29/545 (86) International application number: PCT/IT2021/050289 (87) International publication number: WO 2022/064537 (31.03.2022 Gazette 2022/13)

(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: 22.09.2020 IT 202000022297 (71) Applicant: Fonga, Franco 33047 Remanzacco (IT)	(72) Inventor: Fonga, Franco 33047 Remanzacco (IT) (74) Representative: Petraz, Davide Luigi et al GLP S.r.l Viale Europa Unita, 171 33100 Udine 33100 Udine (IT)