(19)

(11)

EP 3 781 746 A1

(12)

(43) Date of publication: 24.02.2021 Bulletin 2021/08 (21) Application number: 19726152.2 (22) Date of filing: 18.04.2019

(51) International Patent Classification (IPC):  E01F 9/588(2016.01) (86) International application number: PCT/IB2019/053218 (87) International publication number: WO 2019/202544 (24.10.2019 Gazette 2019/43)

(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: 19.04.2018 IT 201800004701 (71) Applicant: Cognigni, Walter 63836 Monte Vidon Corrado (FM) (IT)	(72) Inventor: Cognigni, Walter 63836 Monte Vidon Corrado (FM) (IT) (74) Representative: Cipolletti, Serena  NEUCO srl Via Giovanni Agnelli 22/24 63900 Fermo 63900 Fermo (IT)