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(11)

EP 2 486 258 A1

(12)

(43) Date of publication: 15.08.2012 Bulletin 2012/33 (21) Application number: 09850313.9 (22) Date of filing: 08.10.2009

(51) International Patent Classification (IPC):  F02B 53/04(2006.01) F02B 55/08(2006.01) F02B 55/16(2006.01) F02B 55/02(2006.01) F02M 25/07(2006.01) (86) International application number: PCT/US2009/059958 (87) International publication number: WO 2011/043773 (14.04.2011 Gazette 2011/15)

(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 MK MT NL NO PL PT RO SE SI SK SM TR (71) Applicant: Pratt & Whitney Rocketdyne Inc. Canoga Park, CA 91309 (US)	(72) Inventor: HORN, Mark David Canoga Park California 91309 (US) (74) Representative: Hull, James Edward  Dehns St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)