(19)

(11)

EP 0 602 092 A1

(12)

(43) Date of publication: 22.06.1994 Bulletin 1994/25 (21) Application number: 92918271.0 (22) Date of filing: 28.08.1992

(51) International Patent Classification (IPC):  A61F 13/ 15( . ) (86) International application number: PCT/GB1992/001585 (87) International publication number: WO 1993/004653 (18.03.1993 Gazette 1993/08)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL SE (30) Priority: 30.08.1991 GB 19910017756 16.09.1991 GB 19910019743 26.11.1991 GB 19910025179 (71) Applicant: BREGER GIBSON LIMITED Holywell, Clwyd CH8 7HJ (GB)	(72) Inventor: BALL, Jeffrey Maurice Didsbury, Manchester M2O 0AN (GB) (74) Representative: Dummett, Thomas Ian Peter, et al  Dummett Copp & Co. 25 The Square Martlesham Heath, Ipswich, Suffolk IP5 7SL Martlesham Heath, Ipswich, Suffolk IP5 7SL (GB)