(19)

(11)

EP 2 326 797 A1

(12)

(43) Date of publication: 01.06.2011 Bulletin 2011/22 (21) Application number: 08876026.9 (22) Date of filing: 22.08.2008

(51) International Patent Classification (IPC):  E21F 1/00(2006.01) (86) International application number: PCT/IT2008/000555 (87) International publication number: WO 2010/021005 (25.02.2010 Gazette 2010/08)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (71) Applicant: Ansaldo STS S.p.A. Genova (IT)	(72) Inventor: MARONGIU, Lucio I-80417 Napoli (IT) (74) Representative: Jorio, Paolo et al STUDIO TORTA Via Viotti 9 10121 Torino 10121 Torino (IT)