(19)

(11)

EP 4 111 076 A1

(12)

(43) Date of publication: 04.01.2023 Bulletin 2023/01 (21) Application number: 21727269.9 (22) Date of filing: 22.04.2021

(51) International Patent Classification (IPC):  F16H 21/52(2006.01) F16H 21/22(2006.01) F16H 21/20(2006.01) F16H 21/46(2006.01) (52) Cooperative Patent Classification (CPC): F16H 21/52; F16H 21/20; F16H 21/22; F16H 21/46 (86) International application number: PCT/IT2021/050126 (87) International publication number: WO 2021/229612 (18.11.2021 Gazette 2021/46)

(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: 12.05.2020 IT 202000010570 (71) Applicant: De Donno, Sergio 20023 Cerro Maggiore (MI) (IT)	(72) Inventor: De Donno, Sergio 20023 Cerro Maggiore (MI) (IT) (74) Representative: Mozzanica, Luca  Brevetti Dott. Ing. Digiovanni Schmiedt S.r.l. Via Aldrovandi, 7 20129 Milano 20129 Milano (IT)