(19)

(11)

EP 4 004 381 A1

(12)

(43) Date of publication: 01.06.2022 Bulletin 2022/22 (21) Application number: 20750743.5 (22) Date of filing: 20.07.2020

(51) International Patent Classification (IPC):  F04F 1/06(2006.01) F15B 11/072(2006.01) F15B 3/00(2006.01) (52) Cooperative Patent Classification (CPC): F15B 11/072; F15B 3/00; F04F 1/06 (86) International application number: PCT/IB2020/056789 (87) International publication number: WO 2021/014330 (28.01.2021 Gazette 2021/04)

(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: 23.07.2019 IT 201900012627 (71) Applicant: STI Srl 24040 Levate (BG) (IT)	(72) Inventors: TONDOLO, Flavio 24040 Levate (BG) (IT) ZENONI, Nicola 24040 Levate (BG) (IT) MONTAGNA, Emanuele 24040 Levate (BG) (IT) (74) Representative: Bruni, Giovanni  Laforgia, Bruni & Partners Corso Duca degli Abruzzi, 2 10128 Torino 10128 Torino (IT)