(19)

(11)

EP 0 746 665 A1

(12)

(43) Date of publication: 11.12.1996 Bulletin 1996/50 (21) Application number: 95908970.0 (22) Date of filing: 21.02.1995

(51) International Patent Classification (IPC):  F16L 1/ 024( . ) E21B 7/ 28( . ) F16L 55/ 165( . ) E21B 7/ 20( . ) E21B 10/ 26( . ) (86) International application number: PCT/FI1995/000086 (87) International publication number: WO 1995/022677 (24.08.1995 Gazette 1995/36)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI NL PT SE (30) Priority: 21.02.1994 FI 19940000796 11.03.1994 FI 19940001154 (71) Applicant: ILOMÄKI, Valto SF-33470 Ylöjärvi (FI)	(72) Inventor: ILOMÄKI, Valto SF-33470 Ylöjärvi (FI) (74) Representative: Nieminen, Taisto Tapani, et al  Patenttitoimisto T. Nieminen Oy, Kehräsaari B 33200 Tampere 33200 Tampere (FI)