(19)

(11)

EP 3 850 157 A1

(12)

(43) Date of publication: 21.07.2021 Bulletin 2021/29 (21) Application number: 19783122.5 (22) Date of filing: 10.09.2019

(51) International Patent Classification (IPC):  E01D 19/04(2006.01) (86) International application number: PCT/IB2019/057615 (87) International publication number: WO 2020/053756 (19.03.2020 Gazette 2020/12)

(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: 11.09.2018 IT 201800008504 (71) Applicant: Atlante S.r.l. 20147 Milano MI (IT)	(72) Inventor: BRENA, Mauro 21052 Busto Arsizio VA (IT) (74) Representative: Concone, Emanuele et al Società Italiana Brevetti S.p.A. Via Carducci 8 20123 Milano 20123 Milano (IT)