(19)

(11)

EP 4 532 862 A1

(12)

(43) Date of publication: 09.04.2025 Bulletin 2025/15 (21) Application number: 23738811.1 (22) Date of filing: 31.05.2023

(51) International Patent Classification (IPC):  E04F 15/12(2006.01) E04F 21/24(2006.01) E04F 21/04(2006.01) E04F 15/14(2006.01) (52) Cooperative Patent Classification (CPC): E04F 15/12; E04F 21/04; E04F 21/24; E04F 15/142; E04F 15/147 (86) International application number: PCT/FI2023/050303 (87) International publication number: WO 2023/233076 (07.12.2023 Gazette 2023/49)

(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: 31.05.2022 FI 20225473 (71) Applicant: Vetara Oy 43540 Rantakylä (FI)	(72) Inventor: MÄKINEN, Vesaville 41450 Leppälahti (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)