(19)

(11)

EP 3 935 297 A1

(12)

(43) Date of publication: 12.01.2022 Bulletin 2022/02 (21) Application number: 20715197.8 (22) Date of filing: 03.03.2020

(51) International Patent Classification (IPC):  F16K 31/06(2006.01) F16K 31/40(2006.01) (52) Cooperative Patent Classification (CPC): F16K 31/0693; F16K 31/404 (86) International application number: PCT/IB2020/051784 (87) International publication number: WO 2020/178726 (10.09.2020 Gazette 2020/37)

(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: 04.03.2019 IT 201900003069 (71) Applicant: ELBI International S.p.A. 10129 Torino (IT)	(72) Inventors: RAVEDATI, Paolo 10124 Moncalieri (TO) (IT) RENDESI, Maurizio 10090 Villarbasse (TO) (IT) DAVI, Massimo 10093 Collegno (TO) (IT) (74) Representative: Boario, Enrico  Barzanò & Zanardo Milano S.p.A. Corso Vittorio Emanuele II, 61 10128 Torino 10128 Torino (IT)