(19)

(11)

EP 0 457 838 A1

(12)

(43) Date of publication: 27.11.1991 Bulletin 1991/48 (21) Application number: 90903606.0 (22) Date of filing: 09.02.1990

(51) International Patent Classification (IPC):  A61J 7/ 00( . ) B02C 4/ 10( . ) B02C 2/ 10( . ) B02C 4/ 12( . ) (86) International application number: PCT/GB1990/000209 (87) International publication number: WO 1990/009241 (23.08.1990 Gazette 1990/20)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 09.02.1989 GB 19890002946 (71) Applicant: GREEN, Frank Arthur Leicester LE4 7TH (GB)	(72) Inventor: GREEN, Frank Arthur Leicester LE4 7TH (GB) (74) Representative: Jones, Stephen Anthony, et al  E. N. Lewis & Taylor 144 New Walk Leicester LE1 7JA Leicester LE1 7JA (GB)