(19)

(11)

EP 4 573 269 A1

(12)

(43) Date of publication: 25.06.2025 Bulletin 2025/26 (21) Application number: 22762145.5 (22) Date of filing: 15.08.2022

(51) International Patent Classification (IPC):  E21D 21/00(2006.01) E21D 21/02(2006.01) (52) Cooperative Patent Classification (CPC): E21D 21/008; E21D 21/0086; E21D 21/02 (86) International application number: PCT/IB2022/057619 (87) International publication number: WO 2024/038298 (22.02.2024 Gazette 2024/08)

(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: Rocbolt Technolgies (Pty) Ltd. Elandsfontein, 1429 Germiston (ZA)	(72) Inventor: BELLINGHAM, Werner, Cornelius 1429 GERMISTON (ZA) (74) Representative: Sandvik  Sandvik Mining and Construction Oy Patent Department PL 100 33311 Tampere 33311 Tampere (FI)