(19)

(11)

EP 0 440 678 A1

(12)

(43) Date of publication: 14.08.1991 Bulletin 1991/33 (21) Application number: 89910953.0 (22) Date of filing: 04.10.1989

(51) International Patent Classification (IPC):  F24D 5/ 10( . ) (86) International application number: PCT/SE1989/000544 (87) International publication number: WO 1990/004135 (19.04.1990 Gazette 1990/09)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 05.10.1988 SE 19880003536 (71) Applicant: GIVENT ROGER ERICSSON AB S-902 45 Umea (SE)	(72) Inventor: ERICSSON, Roger S-913 00 Holmsund (SE) (74) Representative: Wiklund, Erik  AWAPATENT AB, Box 5117 S-200 71 Malmö S-200 71 Malmö (SE)