Patent ID: 6733422
Filing Date: 2004-05-11
Classification: A63B

Abstract:
A treadmill comprising:two hollow support arms fitted to both sides of the a front end of a treadmill base, two handle bars and an electrical console being provided at tops of said hollow support arms while a base frame is formed at a bottom thereof, a fixed type roller set being disposed at a rear end of the base frame; a treadmill base being rectangular and having a ground-touching support wheel fitted to both inner sides at a bottom of a rear end of said treadmill base, respectively; and hidden roller sets pivotally connected at a bottom ends of both hollow support arms by means of a pivot, respectively, so that said hidden roller sets are received inside said hollow support arms when said treadmill base is placed in an operational state, thereby avoiding an unexpected sliding shift, and wherein said hidden roller sets are taken out when said treadmill base is folded up in a storage position so that rollers are in contact with the ground and work with said fixed type roller set at the rear end of said frame; accordingly, the treadmill is smoothly moved.