(19)

(11)

EP 4 139 533 A1

(12)

(43) Date of publication: 01.03.2023 Bulletin 2023/09 (21) Application number: 21729048.5 (22) Date of filing: 22.04.2021

(51) International Patent Classification (IPC):  E04B 1/94(2006.01) E04B 1/80(2006.01) (52) Cooperative Patent Classification (CPC): E04B 1/948; E04B 1/947; E04B 1/803 (86) International application number: PCT/NL2021/050265 (87) International publication number: WO 2021/215924 (28.10.2021 Gazette 2021/43)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 23.04.2020 NL 1043636 (71) Applicant: Tchüpp GmbH 6003 Luzern (CH)	(72) Inventor: BERLEE, Anthonie Bernardus 3735 MT Bosch en Duin (NL) (74) Representative: Nederlandsch Octrooibureau  P.O. Box 29720 2502 LS The Hague 2502 LS The Hague (NL)