(19)

(11)

EP 3 538 718 A1

(12)

(43) Date of publication: 18.09.2019 Bulletin 2019/38 (21) Application number: 17822047.1 (22) Date of filing: 08.11.2017

(51) International Patent Classification (IPC):  E04B 1/76(2006.01) F16L 7/02(2006.01) F16L 5/02(2006.01) (86) International application number: PCT/NL2017/050722 (87) International publication number: WO 2018/088897 (17.05.2018 Gazette 2018/20)

(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: MA MD (30) Priority: 08.11.2016 NL 1042130 (71) Applicant: Tchüpp GmbH 6014 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)