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EP 3 921 522 A1

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(43) Date of publication: 15.12.2021 Bulletin 2021/50 (21) Application number: 20723922.9 (22) Date of filing: 10.02.2020

(51) International Patent Classification (IPC):  F02B 33/20(2006.01) F02G 1/02(2006.01) F02G 1/06(2006.01) F01L 5/02(2006.01) F01B 7/02(2006.01) F01L 7/06(2006.01) F01L 3/20(2006.01) F01L 1/32(2006.01) (52) Cooperative Patent Classification (CPC): F02G 1/02; F02G 2270/90; F02G 1/06; F01B 7/14; F01L 7/00; F01B 23/10 (86) International application number: PCT/IB2020/051024 (87) International publication number: WO 2020/161684 (13.08.2020 Gazette 2020/33)

(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: 08.02.2019 IT 201900001821 (71) Applicants: Spiga Nord SpA 16042 Carasco (IT) Della Luna, Vincenza 17019 Varazze (IT) Placidi, Maurizio 17019 Varazze (IT) Placidi, Marco 17019 Varazze (IT)

(72) Inventors: PLACIDI, Aldo 17019 Varazze (IT) SANTERO, Augusto 17058 Dego (IT) (74) Representative: Bottino, Giovanni  ARBO Srl Via Colombo, 11/29 16121 Genova 16121 Genova (IT)