(19)

(11)

EP 0 442 908 A1

(12)

(43) Date of publication: 28.08.1991 Bulletin 1991/35 (21) Application number: 89912017.0 (22) Date of filing: 02.11.1989

(51) International Patent Classification (IPC):  F15B 11/ 076( . ) (86) International application number: PCT/SE1989/000624 (87) International publication number: WO 1990/005245 (17.05.1990 Gazette 1990/11)

(84) Designated Contracting States: BE DE FR GB IT NL SE (30) Priority: 08.11.1988 SE 19880004035 (71) Applicant: OVERSTROM, Sven-Erik S-175 63 Järfälla (SE)	(72) Inventor: OVERSTROM, Sven-Erik S-175 63 Järfälla (SE) (74) Representative: Nyberg, Bengt  CARMINGER, UUSITALO & NYBERG Patentbyra AB P.O. Box 7274 S-103 89 Stockholm S-103 89 Stockholm (SE)