(19)

(11)

EP 3 589 840 A1

(12)

(43) Date of publication: 08.01.2020 Bulletin 2020/02 (21) Application number: 17719728.2 (22) Date of filing: 01.03.2017

(51) International Patent Classification (IPC):  F04B 17/04(2006.01) F16K 31/06(2006.01) H01H 71/02(2006.01) G05D 16/20(2006.01) H01H 71/08(2006.01) (86) International application number: PCT/IT2017/000041 (87) International publication number: WO 2018/158785 (07.09.2018 Gazette 2018/36)

(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: MA MD (71) Applicant: Ceme S.p.A. 20144 Milano (IT)	(72) Inventor: CASSOLA, Marta 20144 Milan (IT) (74) Representative: Tarabbia, Luigi  Bugnion S.p.A Viale Lancetti, 17 20158 Milano 20158 Milano (IT)