(19)

(11)

EP 0 592 648 A1

(12)

(43) Date of publication: 20.04.1994 Bulletin 1994/16 (21) Application number: 93910520.0 (22) Date of filing: 11.05.1993

(51) International Patent Classification (IPC):  F24F 13/ 02( . ) F24F 13/ 14( . ) (86) International application number: PCT/SE1993/000413 (87) International publication number: WO 1993/023711 (25.11.1993 Gazette 1993/28)

(84) Designated Contracting States: BE CH DE FR GB LI (30) Priority: 11.05.1992 SE 19920001479 16.04.1993 SE 19930001245 (71) Applicant: BERGDAHL, Knut S-865 32 Alnö (SE)	(72) Inventor: BERGDAHL, Knut S-865 32 Alnö (SE) (74) Representative: Lundin, Björn-Eric  Trelleborg AB Patents and Trade Marks Box 21024 S-100 31 Stockholm S-100 31 Stockholm (SE)