(19)

(11)

EP 1 485 576 A1

(12)

(43) Date of publication: 15.12.2004 Bulletin 2004/51 (21) Application number: 03739640.5 (22) Date of filing: 14.02.2003

(51) International Patent Classification (IPC)7: F01C 1/352, F04C 15/04, F01C 21/08, F01C 1/344 (86) International application number: PCT/IT2003/000076 (87) International publication number: WO 2003/069127 (21.08.2003 Gazette 2003/34)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR Designated Extension States: AL LT LV MK RO (30) Priority: 15.02.2002 IT BO20020076 (71) Applicant: Pierburg S.p.A. 66034 Lanciano (IT)	(72) Inventors: PACHETTI, Carlo I-56121 Pisa (IT) ARMENIO, Giacomo I-57128 Livorno (IT) RIGHETTI, Daniele I-57128 Livorno (IT) (74) Representative: Jorio, Paolo et al STUDIO TORTA S.r.l.,Via Viotti, 9 10121 Torino 10121 Torino (IT)