(19)

(11)

EP 1 384 031 A1

(12)

(43) Date of publication: 28.01.2004 Bulletin 2004/05 (21) Application number: 02706819.6 (22) Date of filing: 27.03.2002

(51) International Patent Classification (IPC)7: F23B 1/04, F23B 3/00, F23L 1/02, F23L 9/02, F23L 15/00, F23H 3/02 // (F23M5/08, F23G7:10) (86) International application number: PCT/FI2002/000262 (87) International publication number: WO 2002/079693 (10.10.2002 Gazette 2002/41)

(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 (30) Priority: 29.03.2001 FI 20010653 05.11.2001 FI 20015036 (71) Applicant: Oy HT Engineering Ltd 42701 Keuruu (FI)	(72) Inventor: MULI, Markku FIN-42800 Haapamäki (FI) (74) Representative: Helke, Kimmo Kalervo  Kespat Oy,P.O. Box 601 40101 Jyväskylä 40101 Jyväskylä (FI)