(19)

(11)

EP 4 558 705 A1

(12)

(43) Date of publication: 28.05.2025 Bulletin 2025/22 (21) Application number: 23748446.4 (22) Date of filing: 18.07.2023

(51) International Patent Classification (IPC):  E21D 11/18(2006.01) E21D 9/12(2006.01) E21D 9/06(2006.01) E21D 11/08(2006.01) (52) Cooperative Patent Classification (CPC): E21D 11/18; E21D 11/083; E21D 9/06; E21D 9/126; E21D 9/122; E21D 9/0607 (86) International application number: PCT/EP2023/069865 (87) International publication number: WO 2024/017867 (25.01.2024 Gazette 2024/04)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 18.07.2022 IT 202200015058 (71) Applicant: Maccaferri Tunneling S.r.l. 20122 Milano (MI) (IT)	(72) Inventor: BONOMI, Cristiano 20068 Peschiera Borromeo (MI) (IT) (74) Representative: Provvisionato, Paolo  Provvisionato & Co S.r.l. Piazza di Porta Mascarella 7 40126 Bologna 40126 Bologna (IT)