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(11)

EP 4 532 895 A1

(12)

(43) Date of publication: 09.04.2025 Bulletin 2025/15 (21) Application number: 23745252.9 (22) Date of filing: 29.05.2023

(51) International Patent Classification (IPC):  E21D 15/02(2006.01) B21D 47/01(2006.01) E04C 3/32(2006.01) E21D 15/502(2006.01) B21D 26/021(2011.01) E04C 3/04(2006.01) E04G 11/04(2006.01) (52) Cooperative Patent Classification (CPC): E21D 15/02; E21D 15/502; E04C 3/04; E04C 3/32; E04G 11/045; B21D 47/01; E04G 13/02; B21D 26/051; E04C 3/005 (86) International application number: PCT/IB2023/055481 (87) International publication number: WO 2023/233266 (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: 02.06.2022 PL 44135522 (71) Applicant: ZIETA PROZESSDESIGN SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA 51-610 Wroclaw (PL)	(72) Inventor: ZI TA, Oskar 51-610 Wroc aw (PL) (74) Representative: Ptasinski, Konrad Witold  Konrad Ptasinski Rzecznik Patentowy Wincentego Pola 11/1 51-140 Wroclaw 51-140 Wroclaw (PL)