(19)

(11)

EP 2 614 257 A1

(12)

(43) Date of publication: 17.07.2013 Bulletin 2013/29 (21) Application number: 10755047.7 (22) Date of filing: 10.09.2010

(51) International Patent Classification (IPC):  F04D 29/24(2006.01) F04D 29/66(2006.01) (86) International application number: PCT/US2010/048332 (87) International publication number: WO 2012/033495 (15.03.2012 Gazette 2012/11)

(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 SE SI SK SM TR (71) Applicant: Pratt & Whitney Rocketdyne Inc. Canoga Park, CA 91309 (US)	(72) Inventors: LUNDE, Kevin J. Canoga Park, California 91309 (US) MENG, Sen Y. Canoga Park, California 91309 (US) (74) Representative: Bridge, Kerry Ann  Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)