(19)

(11)

EP 0 566 598 A1

(12)

(43) Date of publication: 27.10.1993 Bulletin 1993/43 (21) Application number: 92901748.0 (22) Date of filing: 07.01.1992

(51) International Patent Classification (IPC):  A61B 1/ 12( . ) A61L 2/ 18( . ) (86) International application number: PCT/GB1992/000025 (87) International publication number: WO 1992/011875 (23.07.1992 Gazette 1992/19)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 07.01.1991 GB 19910000267 (71) Applicants: DUNCAN GROUP PLC Ripley, Surrey GU23 6AY (GB) SHARPE, John Ernest Elmson Beckenham, Kent BR3 1NY (GB) KELEMEN, Mary Viktoria Richmond TW10 5AW (GB)	(72) Inventors: SHARPE, John, Ernest, Elsom 104 Copers Cope Road Kent BR3 1NY (GB) KELEMEN, Mary, Viktoria Richmond TW10 5AW (GB) (74) Representative: Baverstock, Michael George Douglas, et al  BOULT, WADE & TENNANT 27 Furnival Street London, EC4A 1PQ London, EC4A 1PQ (GB)