(19)

(11)

EP 4 392 611 A1

(12)

(43) Date of publication: 03.07.2024 Bulletin 2024/27 (21) Application number: 22860715.6 (22) Date of filing: 17.08.2022

(51) International Patent Classification (IPC):  E01F 15/04(2006.01) E01F 15/08(2006.01) E01F 15/06(2006.01) (52) Cooperative Patent Classification (CPC): E01F 15/06 (86) International application number: PCT/IB2022/057689 (87) International publication number: WO 2023/026138 (02.03.2023 Gazette 2023/09)

(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: 25.08.2021 AU 2021221795 24.11.2021 AU 2021903788 (71) Applicant: Robos International Limited Parnell, Auckland, 1052 (NZ)	(72) Inventor: HUDSON, David Marshall Remuera, Auckland, 1050 (NZ) (74) Representative: Algemeen Octrooi- en Merkenbureau B.V.  P.O. Box 645 5600 AP Eindhoven 5600 AP Eindhoven (NL)