(19)

(11)

EP 1 407 176 A1

(12)

(43) Date of publication: 14.04.2004 Bulletin 2004/16 (21) Application number: 01931943.3 (22) Date of filing: 23.05.2001

(51) International Patent Classification (IPC)7: F16K 11/12 (86) International application number: PCT/GB2001/002333 (87) International publication number: WO 2001/090616 (29.11.2001 Gazette 2001/48)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR (30) Priority: 23.05.2000 GB 0012541 (71) Applicant: Satchwell Control Systems Limited High Wycombe,Buckinghamshire HP13 5SF (GB)	(72) Inventor: DENE, Matthews Hook,Hampshire RG27 9UN (GB) (74) Representative: Greenwood, John David et al Graham Watt & Co.,St. Botholp's House7-9 St. Botholp's Road Sevenoaks,Kent TN13 3AJ Sevenoaks,Kent TN13 3AJ (GB)