(19)

(11)

EP 2 499 376 A1

(12)

(43) Date of publication: 19.09.2012 Bulletin 2012/38 (21) Application number: 10779528.8 (22) Date of filing: 10.11.2010

(51) International Patent Classification (IPC):  F04D 17/12(2006.01) F04D 29/58(2006.01) F04D 25/06(2006.01) F04D 29/70(2006.01) (86) International application number: PCT/EP2010/067177 (87) International publication number: WO 2011/058037 (19.05.2011 Gazette 2011/20)

(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 (30) Priority: 11.11.2009 EP 09014133 (71) Applicant: Siemens Aktiengesellschaft 80333 München (DE)	(72) Inventor: VAN DER SPAN, Patrick NL-7558ND Hengelo (NL) (74) Representative: Wolff, Harry  Siemens Aktiengesellschaft Postfach 22 16 34 80506 München 80506 München (DE)