(19)

(11)

EP 0 417 087 A1

(12)

(43) Date of publication: 20.03.1991 Bulletin 1991/12 (21) Application number: 88904705.0 (22) Date of filing: 19.05.1988

(51) International Patent Classification (IPC):  F15B 11/ 00( . ) F15B 21/ 02( . ) F15B 11/ 16( . ) F15B 21/ 08( . ) (86) International application number: PCT/SE1988/000260 (87) International publication number: WO 1988/009442 (01.12.1988 Gazette 1988/26)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 19.05.1987 SE 19870002064 (71) Applicant: Flutron AB S-135 49 Tyresö (SE)	(72) Inventor: STENLUND, Stig S-132 00 Saltsjöbaden (SE) (74) Representative: Jacobsson, Rune, et al  Axel Ehrners Patentbyra AB Box 10316 S-100 55 Stockholm S-100 55 Stockholm (SE)