(19)

(11)

EP 0 419 481 A1

(12)

(43) Date of publication: 03.04.1991 Bulletin 1991/14 (21) Application number: 89901137.0 (22) Date of filing: 16.12.1988

(51) International Patent Classification (IPC):  F16K 3/ 08( . ) (86) International application number: PCT/GB1988/001130 (87) International publication number: WO 1989/005937 (29.06.1989 Gazette 1989/14)

(84) Designated Contracting States: AT BE CH DE FR IT LI LU NL SE (30) Priority: 16.12.1987 GB 19870029349 08.11.1988 GB 19880026108 (71) Applicant: REES, Linda Mary Swansea SA4 1ND, West Glamorgan (GB)	(72) Inventor: REES, Alan Swansea, West Glamorgan SA4 1ND (GB) (74) Representative: Austin, Hedley William, et al  Urquhart-Dykes & Lord Alexandra House 1 Alexandra Road Swansea West Glamorgan SA1 5ED Swansea West Glamorgan SA1 5ED (GB)