(19)

(11)

EP 0 064 534 A1

(12)

(43) Date of publication: 17.11.1982 Bulletin 1982/46 (21) Application number: 81903154.0 (22) Date of filing: 30.10.1981

(51) International Patent Classification (IPC):  A61F 2/ 06( . ) A61L 27/ 34( . ) A61L 27/ 14( . ) (86) International application number: PCT/US1981/001467 (87) International publication number: WO 1982/001647 (27.05.1982 Gazette 1982/14)

(84) Designated Contracting States: CH DE FR GB LI NL SE (30) Priority: 17.11.1980 US 19800207678 (71) Applicant: KASTER, Robert L. Plymouth, MN 55447 (US)	(72) Inventor: KASTER, Robert L. Plymouth, MN 55447 (US) (74) Representative: Parr, Ronald Edward R.E. Parr & Co.  Colman House Station Road Knowle Solihull West Midlands B93 0HL Knowle Solihull West Midlands B93 0HL (GB)