(19)

(11)

EP 4 143 395 A1

(12)

(43) Date of publication: 08.03.2023 Bulletin 2023/10 (21) Application number: 21720161.5 (22) Date of filing: 22.04.2021

(51) International Patent Classification (IPC):  E04B 2/06(2006.01) E04C 5/07(2006.01) (52) Cooperative Patent Classification (CPC): E04C 1/40; E04C 5/07 (86) International application number: PCT/IB2021/053318 (87) International publication number: WO 2021/220110 (04.11.2021 Gazette 2021/44)

(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: 27.04.2020 IT 202000009145 (71) Applicant: Ekoru S.r.l. 80040 Volla (NA) (IT)	(72) Inventors: BACCHI, Claudio 42022 Boretto (RE) (IT) SUBACCHI, Claudio 29122 Piacenza (IT) FERRI, Giovanni 43040 Rubbiano Solignano (PR) (IT) (74) Representative: Monelli, Alberto  Bugnion S.p.A. Largo Michele Novaro 1/A 43121 Parma 43121 Parma (IT)