(19)

(11)

EP 3 791 019 A1

(12)

(43) Date of publication: 17.03.2021 Bulletin 2021/11 (21) Application number: 18743873.4 (22) Date of filing: 09.05.2018

(51) International Patent Classification (IPC):  E01C 13/08(2006.01) (86) International application number: PCT/IT2018/000067 (87) International publication number: WO 2019/215768 (14.11.2019 Gazette 2019/46)

(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 (71) Applicant: MAR. Project S.r.l. 56121 Pisa (IT)	(72) Inventor: NUSCA, Marina 56017 San Giuliano Terme (Pisa) (IT) (74) Representative: ABM Agenzia Brevetti & Marchi  Viale Giovanni Pisano, 31 56123 Pisa 56123 Pisa (IT)