(19)

(11)

EP 0 494 970 A1

(12)

(43) Date of publication: 22.07.1992 Bulletin 1992/30 (21) Application number: 90915651.0 (22) Date of filing: 25.09.1990

(51) International Patent Classification (IPC):  A63B( . ) A63B 1/ 00( . ) A63B 22/ 00( . ) A63B 23/ 04( . ) A63B 9/ 00( . ) A63B 5/ 12( . ) A63B 23/ 00( . ) (86) International application number: PCT/US1990/005446 (87) International publication number: WO 1991/004767 (18.04.1991 Gazette 1991/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 06.10.1989 US 19890418159 (71) Applicant: The Step Company Atlanta, Georgia 30339 (US)	(72) Inventors: IRWIN, Lyle, Ray Kennesaw, GA 30144 (US) Hand, Peter H. Atlanta, GA 30309 (US) Leftwich, Edward F. Decatur, GA 30030 (US) (74) Representative: Brunner, Michael John  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)