(19)

(11)

EP 4 051 838 A1

(12)

(43) Date of publication: 07.09.2022 Bulletin 2022/36 (21) Application number: 20800747.6 (22) Date of filing: 29.10.2020

(51) International Patent Classification (IPC):  E01C 13/08(2006.01) (52) Cooperative Patent Classification (CPC): E01C 13/08 (86) International application number: PCT/NL2020/050673 (87) International publication number: WO 2021/086187 (06.05.2021 Gazette 2021/18)

(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: 01.11.2019 NL 2024145 (71) Applicant: Innograaf B.V. 6602 ZX Wijchen (NL)	(72) Inventor: NOORDEGRAAF, Jan 6602 ZX Wijchen (NL) (74) Representative: Algemeen Octrooi- en Merkenbureau B.V.  P.O. Box 645 5600 AP Eindhoven 5600 AP Eindhoven (NL)