(19)

(11)

EP 4 418 974 A1

(12)

(43) Date of publication: 28.08.2024 Bulletin 2024/35 (21) Application number: 22809223.5 (22) Date of filing: 18.10.2022

(51) International Patent Classification (IPC):  A47L 15/42(2006.01) (52) Cooperative Patent Classification (CPC): A47L 15/4285; A47L 15/4291; A47L 15/0076; A47L 15/4209; A47L 15/4287; Y02B 40/00 (86) International application number: PCT/IT2022/050281 (87) International publication number: WO 2023/067640 (27.04.2023 Gazette 2023/17)

(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: 19.10.2021 IT 202100026846 (71) Applicant: Elframo S.p.A. 24127 Bergamo (IT)	(72) Inventors: NASSUATO, Davide 24127 Bergamo (IT) IMBESI, Carmelo 24127 Bergamo (IT) (74) Representative: Petraz, Gilberto Luigi et al GLP S.r.l. Viale Europa Unita, 171 33100 Udine Viale Europa Unita, 171 33100 Udine (IT)