(19)

(11)

EP 4 010 148 A1

(12)

(43) Date of publication: 15.06.2022 Bulletin 2022/24 (21) Application number: 20764768.6 (22) Date of filing: 04.08.2020

(51) International Patent Classification (IPC):  B24B 7/18(2006.01) B24B 29/00(2006.01) B24B 47/04(2006.01) A47L 11/00(2006.01) B24B 23/04(2006.01) B24B 47/16(2006.01) (52) Cooperative Patent Classification (CPC): B24B 7/18; B24B 29/005; B24B 23/04; B24B 47/04; B24B 47/16; A47L 11/4069; A47L 11/06 (86) International application number: PCT/IB2020/057348 (87) International publication number: WO 2021/024173 (11.02.2021 Gazette 2021/06)

(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: 05.08.2019 IT 201900014037 (71) Applicant: Kunzle & Tasin S.r.l. 27023 Cassolnovo (PV) (IT)	(72) Inventor: BIFFIGNANDI, Alberto 27023 Cassolnovo (PV) (IT) (74) Representative: Fisauli, Beatrice A. M.  Con Lor S.p.A Via Bronzino, 8 20133 Milano 20133 Milano (IT)