(19)

(11)

EP 4 473 164 A1

(12)

(43) Date of publication: 11.12.2024 Bulletin 2024/50 (21) Application number: 23749382.0 (22) Date of filing: 02.02.2023

(51) International Patent Classification (IPC):  E02B 1/00(2006.01) E02B 8/08(2006.01) (52) Cooperative Patent Classification (CPC): E02B 8/085; E02B 1/006; G01S 17/88; G03B 17/08 (86) International application number: PCT/FI2023/050065 (87) International publication number: WO 2023/148429 (10.08.2023 Gazette 2023/32)

(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: 02.02.2022 FI 20220008 29.07.2022 FI 20220051 23.11.2022 US 202217993540 (71) Applicant: Kalasydän Oy 96800 Rovaniemi (FI)	(72) Inventor: AITTANIEMI, Tarmo 96800 Rovaniemi (FI) (74) Representative: Heinonen & Co  Attorneys-at-Law Ltd P.O.Box 671 00101 Helsinki 00101 Helsinki (FI)