(19)

(11)

EP 0 904 470 A2

(12)

(43) Date of publication: 31.03.1999 Bulletin 1999/13 (21) Application number: 97927299.0 (22) Date of filing: 23.06.1997

(51) International Patent Classification (IPC):  E03C 1/ 01( . ) E03C 1/ 266( . ) E03B 1/ 04( . ) (86) International application number: PCT/GB1997/001689 (87) International publication number: WO 1997/049874 (31.12.1997 Gazette 1998/05)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 21.06.1996 GB 19960013106 (71) Applicant: Aquasaver Limited Bude, Cornwall EX23 8LT (GB)	(72) Inventor: BURTON, Michael John Bude, Cornwall EX23 8QP (GB) (74) Representative: Harrison, Ivor Stanley, et al  Withers & Rogers, Goldings House, 2 Hays Lane London SE1 2HW London SE1 2HW (GB)