(19)

(11)

EP 0 390 824 A1

(12)

(43) Date of publication: 10.10.1990 Bulletin 1990/41 (21) Application number: 89900127.0 (22) Date of filing: 02.12.1988

(51) International Patent Classification (IPC):  F16L 45/ 00( . ) (86) International application number: PCT/FI1988/000195 (87) International publication number: WO 1989/005418 (15.06.1989 Gazette 1989/13)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 07.12.1987 FI 19870005365 18.04.1988 FI 19880001801 (71) Applicant: HINKKANEN, Vilho SF-02360 Espoo 36 (FI)	(72) Inventor: HINKKANEN, Vilho SF-02360 Espoo 36 (FI) (74) Representative: Marles, Alan David  Stevens, Hewlett & Perkins 1 St. Augustine's Place Bristol BS1 4UD Bristol BS1 4UD (GB)