Running exerciser

Claim 1

A running exerciser comprising: a base frame having a first shaft mounted approximate the front part thereof, a second shaft mounted across rear part thereof, a first fixed rod mounted between the front end of the base frame and the first shaft, and a second fixed rod mounted between the front end of the base frame and the first shaft; a pair of inverted U-shaped members each mounted at one side of said base frame; an endless loop track wrapping around the first shaft and the second shaft; a pulley fastened on one end of said first shaft; a motor assembly provided with a driving shaft having a key formed integrally therewith and a tubular rod put over said second fixed rod; a stop disc put over the driving shaft of the motor assembly; a first spring enclosing the driving shaft of the motor assembly and bearing against the stop disc; a pair of clutch discs each having a conical surface and a keyway adapted to the key of the driving shaft of the motor assembly, said conical clutch discs being put over said driving shaft with the conical surface thereof facing each other; a second spring means enclosing the driving shaft of the motor assembly and forcing the conical clutch discs to move towards each other; a stop plate fixedly connected to free end of the driving shaft of the motor assembly by a screw; a belt connecting said pulley with said clutch discs; a speed control mechanism mounted on one of said inverted U-shaped members, said mechanism including a housing having therein a movable block, a screw fixed in said housing and threadedly connected with said movable member, and a cable wire connected at one end with the movable block and at the other end with the motor assembly; and, an adjustable stand mounted on a lower front end of said base frame, said adjustable stand having a screw engaged with a U-shaped element which is in turn connected with said tubular member enclosing said first fixed rod wherein said tubular member has at least one leg member projecting radially outward from said tubular member, whereby when said screw is turned into said U-shaped element, said tubular member will rotate downward causing said at least one leg member to rotate downward thereby lifting the front end of said base frame.