(19)

(11)

EP 4 165 258 A1

(12)

(43) Date of publication: 19.04.2023 Bulletin 2023/16 (21) Application number: 21731806.2 (22) Date of filing: 11.06.2021

(51) International Patent Classification (IPC):  E04F 13/08(2006.01) E04B 9/26(2006.01) E04B 9/04(2006.01) F16B 21/08(2006.01) (52) Cooperative Patent Classification (CPC): E04F 13/0812; E04F 13/0816; E04F 13/0858; E04F 13/0853; E04B 9/0435; E04B 9/26 (86) International application number: PCT/EP2021/065848 (87) International publication number: WO 2021/254914 (23.12.2021 Gazette 2021/51)

(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: 15.06.2020 IT 202000014137 15.06.2020 IT 202000014140 (71) Applicant: Promat S.p.A. 24040 Filago (IT)	(72) Inventor: PUCCI, Giuliano 50050 Gambassi Terme (IT) (74) Representative: Etex Services NV - Etex IPSC  Kuiermansstraat 1 1880 Kapelle-op-den-Bos 1880 Kapelle-op-den-Bos (BE)