(19)

(11)

EP 4 448 873 A1

(12)

(43) Date of publication: 23.10.2024 Bulletin 2024/43 (21) Application number: 22829933.5 (22) Date of filing: 09.12.2022

(51) International Patent Classification (IPC):  E01H 1/08(2006.01) (52) Cooperative Patent Classification (CPC): E01H 1/0845 (86) International application number: PCT/NL2022/050712 (87) International publication number: WO 2023/113593 (22.06.2023 Gazette 2023/25)

(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: 15.12.2021 NL 2030142 (71) Applicant: Ravo B.V. 1822 BW Alkmaar (NL)	(72) Inventor: PRINS, Rob 1822 BW Alkmaar (NL) (74) Representative: Patent Business B.V.  Lange Amerikaweg 81 7332 BP Apeldoorn 7332 BP Apeldoorn (NL)