(19)

(11)

EP 0 198 883 A1

(12)

(43) Date of publication: 29.10.1986 Bulletin 1986/44 (21) Application number: 85905253.0 (22) Date of filing: 04.10.1985

(51) International Patent Classification (IPC):  A61F 6/ 06( . ) A61F 6/ 08( . ) (86) International application number: PCT/US1985/001905 (87) International publication number: WO 1986/001998 (10.04.1986 Gazette 1986/08)

(84) Designated Contracting States: FR (30) Priority: 05.10.1984 US 19840658279 (71) Applicant: WILLIS, Robert E. Flint, MI 48505 (US)	(72) Inventor: WILLIS, Robert E. Flint, MI 48505 (US) (74) Representative: Descourtieux, Philippe  Cabinet Beau de Loménie 158, rue de l'Université F-75340 Paris Cédex 07 F-75340 Paris Cédex 07 (FR)