(19)

(11)

EP 1 230 457 A1

(12)

(43) Date of publication: 14.08.2002 Bulletin 2002/33 (21) Application number: 99949242.4 (22) Date of filing: 18.10.1999

(51) International Patent Classification (IPC)7: E02B 3/12, E02D 31/00 (86) International application number: PCT/GB9903/441 (87) International publication number: WO 0129/326 (26.04.2001 Gazette 2001/17)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (71) Applicant: Gent, Keith Andrew Norfolk NR24 2RS (GB)	(72) Inventor: Gent, Keith Andrew Norfolk NR24 2RS (GB) (74) Representative: Dunnett, Julie Elizabeth  Barker Brettell,St John's Innovation Centre,Cowley Road Cambridge CB4 0WS Cambridge CB4 0WS (GB)