(19)

(11)

EP 3 999 276 A1

(12)

(43) Date of publication: 25.05.2022 Bulletin 2022/21 (21) Application number: 20747475.0 (22) Date of filing: 13.07.2020

(51) International Patent Classification (IPC):  B24B 21/00(2006.01) B24B 27/00(2006.01) B24B 21/20(2006.01) B24B 41/02(2006.01) (52) Cooperative Patent Classification (CPC): B24B 21/00; B24B 27/0038; B24B 21/20; B24B 41/02 (86) International application number: PCT/IB2020/056552 (87) International publication number: WO 2021/009654 (21.01.2021 Gazette 2021/03)

(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: 17.07.2019 IT 201900012102 (71) Applicant: Sir S.p.A. 41122 Modena (IT)	(72) Inventor: PASSONI, Luciano 41122 Modena (IT) (74) Representative: Luppi, Emanuele  Brunacci & Partners S.r.l. Via Pietro Giardini, 625 41125 Modena (MO) 41125 Modena (MO) (IT)