(19)

(11)

EP 0 717 825 A1

(12)

(43) Date of publication: 26.06.1996 Bulletin 1996/26 (21) Application number: 94926286.0 (22) Date of filing: 06.09.1994

(51) International Patent Classification (IPC):  F16L 55/ 1645( . ) F16L 55/ 179( . ) (86) International application number: PCT/GB1994/001932 (87) International publication number: WO 1995/007433 (16.03.1995 Gazette 1995/12)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE (30) Priority: 06.09.1993 GB 19930018446 (71) Applicant: AMKRETE (UK) LTD. Cowbridge, South Glamorgan CF7 7PB (GB)	(72) Inventors: SHENTON, Robert Alfred Pontyclun, Mid Glamorgan CF7 8JT (GB) SHENTON, Michael John Pontyclun, Mid Glamorgan CF7 9JT (GB) (74) Representative: Linn, Samuel Jonathan, et al  MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)