(19)

(11)

EP 0 261 105 A1

(12)

(43) Date of publication: 30.03.1988 Bulletin 1988/13 (21) Application number: 86900679.0 (22) Date of filing: 20.12.1985

(51) International Patent Classification (IPC):  F16L( . ) F16L 55/ 02( . ) F01N 1/ 24( . ) F16L 55/ 033( . ) (86) International application number: PCT/SE1985/000540 (87) International publication number: WO 1987/003948 (02.07.1987 Gazette 1987/14)

(84) Designated Contracting States: BE DE FR GB NL (71) Applicant: VIAK AB S-162 15 Vällingby (SE)	(72) Inventor: NILLSON, Nils-Ake S-183 47 Täby (SE) (74) Representative: Billberg, Hans, et al  Axel Ehrners Patentbyra AB Box 10 316 S-100 55 Stockholm S-100 55 Stockholm (SE)