(19)

(11)

EP 4 453 315 A1

(12)

(43) Date of publication: 30.10.2024 Bulletin 2024/44 (21) Application number: 22850666.3 (22) Date of filing: 05.12.2022

(51) International Patent Classification (IPC):  E01C 11/22(2006.01) (52) Cooperative Patent Classification (CPC): E01C 11/221 (86) International application number: PCT/HU2022/050086 (87) International publication number: WO 2023/118909 (29.06.2023 Gazette 2023/26)

(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: 22.12.2021 HU 2100451 (71) Applicant: Barabás, Árpád 8200 Veszprém (HU)	(72) Inventor: Barabás, Árpád 8200 Veszprém (HU) (74) Representative: Danubia Patent & Law Office LLC  Bajcsy-Zsilinszky út 16 P.O.Box 198 1368 Budapest 1368 Budapest (HU)