(19)

(11)

EP 3 973 125 A1

(12)

(43) Date of publication: 30.03.2022 Bulletin 2022/13 (21) Application number: 20729819.1 (22) Date of filing: 22.05.2020

(51) International Patent Classification (IPC):  E05C 1/04(2006.01) E05B 67/38(2006.01) (52) Cooperative Patent Classification (CPC): E05C 1/04; E05B 67/383; E05B 17/002; E05B 9/00; E05B 65/0007 (86) International application number: PCT/GB2020/051265 (87) International publication number: WO 2020/234613 (26.11.2020 Gazette 2020/48)

(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: 23.05.2019 GB 201907300 (71) Applicant: F. Klucznik & Son Limited Adderley Green Stoke-on-Trent, Staffordshire ST3 5BW (GB)	(72) Inventor: HALL, Graham Stoke-on-Trent, Staffordshire ST3 5BW (GB) (74) Representative: Swindell & Pearson Limited  48 Friar Gate Derby DE1 1GY Derby DE1 1GY (GB)