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(11)

EP 3 448 574 A1

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(43) Date of publication: 06.03.2019 Bulletin 2019/10 (21) Application number: 16725924.1 (22) Date of filing: 28.04.2016

(51) International Patent Classification (IPC):  B02C 17/04(2006.01) B02C 23/08(2006.01) B02C 17/18(2006.01) (86) International application number: PCT/IB2016/052418 (87) International publication number: WO 2017/187232 (02.11.2017 Gazette 2017/44)

(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: MA MD (71) Applicant: Serradimigni, Walter 42013 Dinazzano d Casalgrande (Reggio Emilia) (IT)	(72) Inventor: Serradimigni, Walter 42013 Dinazzano d Casalgrande (Reggio Emilia) (IT) (74) Representative: Gagliardelli, Fabrizio  Bugnion S.p.A. Via M. Vellani Marchi 20 41124 Modena 41124 Modena (IT)