(19)

(11)

EP 0 613 393 A1

(12)

(43) Date of publication: 07.09.1994 Bulletin 1994/36 (21) Application number: 92925280.0 (22) Date of filing: 18.11.1992

(51) International Patent Classification (IPC):  A63B 69/ 36( . ) (86) International application number: PCT/US1992/009899 (87) International publication number: WO 1993/009856 (27.05.1993 Gazette 1993/13)

(84) Designated Contracting States: DE ES FR GB SE (30) Priority: 21.11.1991 US 19910795665 10.11.1992 US 19920972995 (71) Applicants: REIMERS, Eric W. Missoula, MT 59802 (US) KLINGER, Lance T. Mountain View CA 94040 (US)	(72) Inventors: REIMERS, Eric W. Missoula, MT 59802 (US) KLINGER, Lance T. Mountain View CA 94040 (US) (74) Representative: Enskat, Michael Antony Frank, et al  Saunders & Dolleymore, 9, Rickmansworth Road Watford, Hertfordshire WD1 7HE Watford, Hertfordshire WD1 7HE (GB)