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(11)

EP 3 856 458 A1

(12)

(43) Date of publication: 04.08.2021 Bulletin 2021/31 (21) Application number: 19787480.3 (22) Date of filing: 23.09.2019

(51) International Patent Classification (IPC):  B24B 41/047(2006.01) B24B 47/12(2006.01) B23Q 39/04(2006.01) B24B 27/00(2006.01) B24D 5/06(2006.01) (86) International application number: PCT/IT2019/050207 (87) International publication number: WO 2020/065689 (02.04.2020 Gazette 2020/14)

(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: 24.09.2018 IT 201800008847 (71) Applicants: Tupini, Giovanni 36015 Schio (VI) (IT) Lo Piccolo, Rosario 36015 Schio (VI) (IT)	(72) Inventors: Tupini, Giovanni 36015 Schio (VI) (IT) Lo Piccolo, Rosario 36015 Schio (VI) (IT) (74) Representative: Garavelli, Paolo  A.BRE.MAR. S.R.L. Consulenza in Proprietà Industriale Via Servais 27 10146 Torino 10146 Torino (IT)