(19)

(11)

EP 1 073 802 A1

(12)

(43) Date of publication: 07.02.2001 Bulletin 2001/06 (21) Application number: 99914676.4 (22) Date of filing: 07.04.1999

(51) International Patent Classification (IPC)7: E03D 1/34, E03D 1/14 (86) International application number: PCT/GB9901/053 (87) International publication number: WO 9954/563 (28.10.1999 Gazette 1999/43)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 21.04.1998 GB 9808263 10.12.1998 GB 9827101 (71) Applicants: Blackborow, John Usk, Monmouthshire NP5 1AN (GB) Frost, Douglas Robert David Cannock, Staffs. WS12 5YJ (GB)	(72) Inventor: FROST, Douglas, Robert, David CannockStaffs. WS12 5YJ (GB) (74) Representative: Moore, John Hamilton  J. H. Moore & Co.,8 Gaiafields Road Lichfield,Staffs. WS13 7LT Lichfield,Staffs. WS13 7LT (GB)