(19)

(11)

EP 1 869 369 A1

(12)

(43) Date of publication: 26.12.2007 Bulletin 2007/52 (21) Application number: 06717100.9 (22) Date of filing: 24.02.2006

(51) International Patent Classification (IPC):  F24D 5/12(2006.01) (86) International application number: PCT/SE2006/050014 (87) International publication number: WO 2006/098691 (21.09.2006 Gazette 2006/38)

(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 (30) Priority: 16.03.2005 SE 0500597 (71) Applicant: Semako AB 114 75 Stockholm (SE)	(72) Inventors: ENGWALL, Sten S-195 92 Märsta (SE) ENGWAL VON SCHEELE, Per-åke S-195 92 Märsta (SE) (74) Representative: Karlsson, Leif Karl Gunnar  Groth & Co. KB Box 6107 102 32 Stockholm 102 32 Stockholm (SE)