(19)

(11)

EP 3 724 398 A1

(12)

(43) Date of publication: 21.10.2020 Bulletin 2020/43 (21) Application number: 18849484.3 (22) Date of filing: 14.12.2018

(51) International Patent Classification (IPC):  E01C 9/00(2006.01) E01B 26/00(2006.01) E01F 13/02(2006.01) E04G 21/32(2006.01) (86) International application number: PCT/IB2018/060093 (87) International publication number: WO 2019/116335 (20.06.2019 Gazette 2019/25)

(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: 14.12.2017 IT 201700144623 (71) Applicant: ZAMAGNI, Gianluca 47822 Santarcangelo di Romagna (IT)	(72) Inventor: ZAMAGNI, Gianluca 47822 Santarcangelo di Romagna (IT) (74) Representative: Ruzzu, Giammario  Via Gulli, 5 40068 San Lazzaro di Savena (BO) 40068 San Lazzaro di Savena (BO) (IT)