(19)

(11)

EP 0 809 737 A1

(12)

(43) Date of publication: 03.12.1997 Bulletin 1997/49 (21) Application number: 96903123.0 (22) Date of filing: 22.02.1996

(51) International Patent Classification (IPC):  E02F 9/ 20( . ) F15B 11/ 04( . ) F15B 21/ 08( . ) E02F 9/ 22( . ) F15B 11/ 16( . ) (86) International application number: PCT/GB1996/000393 (87) International publication number: WO 1996/027051 (06.09.1996 Gazette 1996/40)

(84) Designated Contracting States: BE DE DK FR IT NL SE (30) Priority: 25.02.1995 GB 19950003854 (71) Applicant: Ultronics Limited Staverton, Gloucester GL2 9QN (GB)	(72) Inventors: TURNER, Stephen, Brian Gloucestershire GL11 5HE (GB) LAKIN, David, Franz Gloucester GL3 2HE (GB) (74) Representative: Higgins, Michael Roger  A.R. Davies & Co. 27, Imperial Square Cheltenham Glos. GL50 1RQ Cheltenham Glos. GL50 1RQ (GB)