(19)

(11)

EP 3 935 227 A1

(12)

(43) Date of publication: 12.01.2022 Bulletin 2022/02 (21) Application number: 20716959.0 (22) Date of filing: 04.03.2020

(51) International Patent Classification (IPC):  E03C 1/04(2006.01) (52) Cooperative Patent Classification (CPC): E03C 1/0401 (86) International application number: PCT/IT2020/050048 (87) International publication number: WO 2020/178870 (10.09.2020 Gazette 2020/37)

(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: 06.03.2019 IT 201900003211 13.02.2020 IT 202000000679 U (71) Applicant: Albanelli, Alfredo 40141 Bologna (IT)	(72) Inventor: Albanelli, Alfredo 40141 Bologna (IT) (74) Representative: Mincone, Antimo  Viale Europa 101 50126 Firenze 50126 Firenze (IT)