(19)

(11)

EP 2 547 909 A1

(12)

(43) Date of publication: 23.01.2013 Bulletin 2013/04 (21) Application number: 11721379.3 (22) Date of filing: 16.03.2011

(51) International Patent Classification (IPC):  F04B 13/00(2006.01) (86) International application number: PCT/IT2011/000074 (87) International publication number: WO 2011/114365 (22.09.2011 Gazette 2011/38)

(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 (30) Priority: 17.03.2010 IT RM20100119 (71) Applicant: Etatron D.S. SpA. 00134 Roma (IT)	(72) Inventor: PROIETTI DE MARCHIS, Roberto 00168 Roma (IT) (74) Representative: Sarpi, Maurizio et al Studio Ferrario srl Via Collina 36 00187 Roma 00187 Roma (IT)