(19)

(11)

EP 3 615 854 A1

(12)

(43) Date of publication: 04.03.2020 Bulletin 2020/10 (21) Application number: 18727356.0 (22) Date of filing: 26.04.2018

(51) International Patent Classification (IPC):  F16K 31/50(2006.01) F16L 29/02(2006.01) F16L 37/40(2006.01) (86) International application number: PCT/GB2018/051095 (87) International publication number: WO 2018/197877 (01.11.2018 Gazette 2018/44)

(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: 28.04.2017 GB 201706814 15.11.2017 GB 201718857 (71) Applicant: Cassellie Ltd. Leeds, West Yorkshire LS27 OTF (GB)	(72) Inventor: DELANEY, Paul Leeds West Yorkshire LS27 OTF (GB) (74) Representative: Aldridge, Christopher Simon  Mohun Aldridge Sykes Limited 12 Park Square East Leeds LS1 2LF Leeds LS1 2LF (GB)