(19)

(11)

EP 0 479 825 A1

(12)

(43) Date of publication: 15.04.1992 Bulletin 1992/16 (21) Application number: 90909436.0 (22) Date of filing: 27.06.1990

(51) International Patent Classification (IPC):  A61F 5/ 41( . ) (86) International application number: PCT/AU1990/000272 (87) International publication number: WO 1991/000073 (10.01.1991 Gazette 1991/02)

(84) Designated Contracting States: AT BE CH DE DK ES GB IT LI LU NL SE (30) Priority: 29.06.1989 AU 19890037147 (71) Applicant: S & T No 27 Pty Ltd Townsville, Queensland 4810 (AU)	(72) Inventor: FLYNN, Darcy, Lester Bluewater Beach, QLD 4818 (AU) (74) Representative: Prüfer, Lutz H., Dipl.-Phys., et al  Harthauser Strasse 25d D-81545 München D-81545 München (DE)