(19)

(11)

EP 4 448 882 A1

(12)

(43) Date of publication: 23.10.2024 Bulletin 2024/43 (21) Application number: 22830568.6 (22) Date of filing: 24.10.2022

(51) International Patent Classification (IPC):  E02F 3/96(2006.01) E02F 3/32(2006.01) (52) Cooperative Patent Classification (CPC): E02F 3/961; E02F 3/32 (86) International application number: PCT/FI2022/050701 (87) International publication number: WO 2023/111383 (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: 17.12.2021 FI 20216294 (71) Applicant: Allu Innovation and Research Center Oy 16320 Pennala (FI)	(72) Inventor: JONNINEN, Markku 58620 LOHILAHTI (FI) (74) Representative: LEITZINGER OY  c/o Spaces Mannerheiminaukio 1A 00100 Helsinki 00100 Helsinki (FI)