(19)

(11)

EP 1 797 392 A2

(12)

(88) Date of publication A3: 03.05.2007 (43) Date of publication: 20.06.2007 Bulletin 2007/25 (21) Application number: 05856918.7 (22) Date of filing: 09.09.2005

(51) International Patent Classification (IPC):  F42B 12/22(2006.01) (86) International application number: PCT/US2005/032301 (87) International publication number: WO 2006/127027 (30.11.2006 Gazette 2006/48)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (30) Priority: 10.09.2004 US 938355 (71) Applicant: RAYTHEON COMPANY Waltham, MA 02451-1449 (US)	(72) Inventor: LLOYD, Richard, M. Melrose, Massachusetts 02176 (US) (74) Representative: Jones, Graham Henry  Graham Jones & Company 77 Beaconsfield Road Blackheath, London SE3 7LG Blackheath, London SE3 7LG (GB)