(19)

(11)

EP 0 389 508 A1

(12)

(43) Date of publication: 03.10.1990 Bulletin 1990/40 (21) Application number: 88909397.0 (22) Date of filing: 24.10.1988

(51) International Patent Classification (IPC):  F24F( . ) F24F 1/ 01( . ) F24F 13/ 08( . ) F24F 13/ 06( . ) F24F 13/ 068( . ) (86) International application number: PCT/SE1988/000559 (87) International publication number: WO 1989/003961 (05.05.1989 Gazette 1989/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 22.10.1987 SE 19870004133 (71) Applicant: FLÄKT AB S-104 81 Stockholm (SE)	(72) Inventor: BJÄRKVIK, Stig S- 560 23 Bankeryd (SE) (74) Representative: Siebmanns, Hubertus  Götalands Patentbyra AB Box 154 S-561 22 Huskvarna S-561 22 Huskvarna (SE)