(19)

(11)

EP 1 523 253 A2

(12)

(88) Date of publication A3: 15.04.2004 (43) Date of publication: 20.04.2005 Bulletin 2005/16 (21) Application number: 03740798.8 (22) Date of filing: 14.07.2003

(51) International Patent Classification (IPC)7: A44B 1/00, E01F 13/02 (86) International application number: PCT/GB2003/003025 (87) International publication number: WO 2004/008901 (29.01.2004 Gazette 2004/05)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 18.07.2002 GB 0216702 (71) Applicant: Primac Limited Hungerford, Berkshire RG17 One (GB)	(72) Inventor: PRISMALL, Ian James Hungerford,Berkshire RG17 9QR (GB) (74) Representative: Bailey, Richard Alan  Marks & Clerk,27 Imperial Square Cheltenham, GL50 1RQ Cheltenham, GL50 1RQ (GB)