(19)

(11)

EP 0 052 638 A1

(12)

(43) Date of publication: 02.06.1982 Bulletin 1982/22 (21) Application number: 81901545.0 (22) Date of filing: 27.05.1981

(51) International Patent Classification (IPC):  F16L 21/ 025( . ) F16L 21/ 035( . ) (86) International application number: PCT/DK1981/000056 (87) International publication number: WO 1981/003535 (10.12.1981 Gazette 1981/29)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (30) Priority: 28.05.1980 DK 19800002301 (71) Applicant: SCHIONNING & ARVE A/S DK-8700 Horsens (DK)	(72) Inventor: CHRISTENSEN, Jorn Sovind DK-8700 Horsens (DK)