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(11)

EP 1 620 197 A1

(12)

(43) Date of publication: 01.02.2006 Bulletin 2006/05 (21) Application number: 04728999.6 (22) Date of filing: 22.04.2004

(51) International Patent Classification (IPC):  B01J 3/00(1968.09) F27B 5/04(1968.09) C21D 9/50(1968.09) F27D 7/06(1968.09) (86) International application number: PCT/SE2004/000624 (87) International publication number: WO 2004/094057 (04.11.2004 Gazette 2004/45)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 23.04.2003 SE 0301192 23.04.2003 US 464653 P (71) Applicant: Volvo Aero Corporation 46181 Trollhättan (SE)	(72) Inventors: LINDQVIST, Joachim S-412 75 Göteborg (SE) LUNDSTRÖM, Dennis S-412 76 Göteborg (SE) (74) Representative: Fröhling, Werner Otto  Volvo Technology Corporation, Corporate Patents, 06820, M1.7 405 08 Göteborg 405 08 Göteborg (SE)