(19)

(11)

EP 3 635 253 A1

(12)

(43) Date of publication: 15.04.2020 Bulletin 2020/16 (21) Application number: 18730124.7 (22) Date of filing: 22.05.2018

(51) International Patent Classification (IPC):  F04B 17/04(2006.01) F04B 53/00(2006.01) (86) International application number: PCT/IB2018/053601 (87) International publication number: WO 2018/224903 (13.12.2018 Gazette 2018/50)

(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: 05.06.2017 IT 201700060837 (71) Applicant: Ceme S.p.A. 20144 Milano (IT)	(72) Inventors: PALMIERI, Roberto 20144 Milano (IT) BENINI, Michele 20144 Milano (IT) (74) Representative: Tarabbia, Luigi  Bugnion S.p.A Viale Lancetti, 17 20158 Milano 20158 Milano (IT)