(19)

(11)

EP 0 516 735 A1

(12)

(43) Date of publication: 09.12.1992 Bulletin 1992/50 (21) Application number: 91905425.0 (22) Date of filing: 20.02.1991

(51) International Patent Classification (IPC):  A63H 3/ 48( . ) A63H 30/ 06( . ) (86) International application number: PCT/US1991/001136 (87) International publication number: WO 1991/012863 (05.09.1991 Gazette 1991/21)

(84) Designated Contracting States: AT BE CH DE DK FR GB IT LI LU NL SE (30) Priority: 20.02.1990 US 19900482146 31.08.1990 US 19900575984 (71) Applicant: FOX VALLEY SYSTEMS, INC. Cary, Illinois 60013-1948 (US)	(72) Inventor: SMRT, Thomas, J. Marengo, IL 60152 (US) (74) Representative: Nicholls, Kathryn Margaret, et al  MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)