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EP 3 880 888 A1

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(43) Date of publication: 22.09.2021 Bulletin 2021/38 (21) Application number: 19816888.2 (22) Date of filing: 13.11.2019

(51) International Patent Classification (IPC):  E01C 11/22(2006.01) E01C 13/02(2006.01) E04H 3/14(2006.01) A63B 71/02(2006.01) A63B 102/08(2015.01) A63C 19/00(2006.01) E01C 13/00(2006.01) E01C 13/06(2006.01) E04H 17/22(2006.01) A63B 69/00(2006.01) A63B 67/00(2006.01) (52) Cooperative Patent Classification (CPC): E01C 13/02; A63C 2019/085; A63C 19/08; E01C 13/06; E01C 11/222; E01C 13/00 (86) International application number: PCT/IB2019/059742 (87) International publication number: WO 2020/100055 (22.05.2020 Gazette 2020/21)

(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: 16.11.2018 IT 201800010385 (71) Applicant: Durocem Italia S.r.l. 42014 Castellarano (RE) (IT)	(72) Inventors: DAVOLI, Roberto 42014 Castellarano (RE) (IT) RUSSO, Roberto 42014 Castellarano (RE) (IT) (74) Representative: Brunacci, Marco  BRUNACCI & PARTNERS S.r.l. Via Pietro Giardini, 625 41125 Modena (MO) 41125 Modena (MO) (IT)