(19)

(11)

EP 1 451 515 A1

(12)

(43) Date of publication: 01.09.2004 Bulletin 2004/36 (21) Application number: 01975789.7 (22) Date of filing: 25.09.2001

(51) International Patent Classification (IPC)7: F27D 17/00 (86) International application number: PCT/US2001/042321 (87) International publication number: WO 2003/038361 (08.05.2003 Gazette 2003/19)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (71) Applicant: Amec Capital Projects Ltd. Darlington DL1 2ED (GB)	(72) Inventors: THOMPSON, Leo, E. Kennewick, WA 99336 (US) LOWERY, Patrick, S. Kennewick, WA 99336 (US) WOOSLEY, Steven, L. Pasco, WA 99301 (US) (74) Representative: Boff, James Charles  Phillips & Leigh5 Pemberton Row London EC4A 3BA London EC4A 3BA (GB)