(19)

(11)

EP 4 419 753 A1

(12)

(43) Date of publication: 28.08.2024 Bulletin 2024/35 (21) Application number: 22879646.2 (22) Date of filing: 19.10.2022

(51) International Patent Classification (IPC):  E02F 3/88(2006.01) E02F 3/92(2006.01) E21C 50/00(2006.01) E02F 9/00(2006.01) E02F 3/90(2006.01) E02F 5/28(2006.01) E02F 7/00(2006.01) (52) Cooperative Patent Classification (CPC): E21C 50/00; E02F 3/8866; E02F 3/905; E02F 7/005; E02F 3/907 (86) International application number: PCT/NO2022/050238 (87) International publication number: WO 2023/068942 (27.04.2023 Gazette 2023/17)

(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: 22.10.2021 NO 20211272 (71) Applicant: Granfoss AS 0978 Oslo (NO)	(72) Inventor: TAYEBI, Davoud 0351 Oslo (NO) (74) Representative: Bryn Aarflot AS  Patent Stortingsgata 8 0161 Oslo 0161 Oslo (NO)