(19)

(11)

EP 2 207 968 A1

(12)

(43) Date of publication: 21.07.2010 Bulletin 2010/29 (21) Application number: 08850771.0 (22) Date of filing: 08.10.2008

(51) International Patent Classification (IPC):  F04D 27/02(2006.01) F01D 17/10(2006.01) (86) International application number: PCT/EP2008/063436 (87) International publication number: WO 2009/062793 (22.05.2009 Gazette 2009/21)

(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 (30) Priority: 12.11.2007 EP 07021944 (71) Applicant: Siemens Aktiengesellschaft 80333 München (DE)	(72) Inventor: TWELL, Philip Lincoln Lincolnshire LN2 3JN (GB)