Treadmill

Abstract

A treadmill includes a frame, a wheel disposed on the frame and two exercise sets arranged on opposite sides of the wheel. Each of the exercise sets includes a track installed on the frame, a rocker disposed on the frame, a crank connected to the wheel, a rod arranged between the crank and the rocker and a tread connected to the rod and crank on one hand and movable on the track at the other hand.

1 . A treadmill comprising a frame, a wheel disposed on the frame and two exercise sets arranged on opposite sides of the wheel, each of the exercise sets comprising:
 a track installed on the frame;   a rocker disposed on the frame;   a crank connected to the wheel;   a rod arranged between the crank and the rocker; and   a tread connected to the rod and crank on one hand and movable on the track at the other hand.   
   
   
       2 . The treadmill according to  claim 1  wherein the frame comprises a front crossbar, a rear crossbar and a longitudinal bar for interconnecting the front and rear crossbars. 
   
   
       3 . The treadmill according to  claim 2  wherein the frame comprises a post connected to the front crossbar, and the rockers are connected to the post. 
   
   
       4 . The treadmill according to  claim 3  comprising an instrument disposed on the post to provide information to exercisers. 
   
   
       5 . The treadmill according to  claim 4  wherein the instrument is a counter. 
   
   
       6 . The treadmill according to  claim 4  wherein the instrument is a clock. 
   
   
       7 . The treadmill according to  claim 4  wherein the instrument is a stop watch. 
   
   
       8 . The treadmill according to  claim 3  comprising a handle connected to the post so that exercisers can hold the handle while treading. 
   
   
       9 . The treadmill according to  claim 8  comprising an extensive element for connecting the handle to the post. 
   
   
       10 . The treadmill according to  claim 1  comprising a resistance element for adjusting the resistance against the rotation of the wheel. 
   
   
       11 . The treadmill according to  claim 1  comprising a shell for covering the wheel. 
   
   
       12 . The treadmill according to  claim 1  wherein each of the exercise sets comprises a shaft disposed on the frame, and the rocker is connected to the shaft. 
   
   
       13 . The treadmill according to  claim 12  wherein each of the exercise sets comprises a sleeve disposed on the shaft, and the rocker is connected to the sleeve. 
   
   
       14 . The treadmill according to  claim 1  wherein each of the exercise sets comprises a yoke connected to the rocker, and the rod is pivotally connected to the yoke. 
   
   
       15 . The treadmill according to  claim 1  wherein each of the exercise sets comprises a yoke connected to the rod, and the tread and crank are pivotally connected to the yoke. 
   
   
       16 . The treadmill according to  claim 1  wherein the track is an arched element. 
   
   
       17 . The treadmill according to  claim 1  wherein each of the exercise sets comprises a stem for supporting an end of the track on the frame. 
   
   
       18 . The treadmill according to  claim 17  wherein the stem is a telescopic element so that the height of the end of the track is adjustable. 
   
   
       19 . The treadmill according to  claim 1  wherein each of the exercise sets comprises a keel connected to the rod and crank on one hand and movable on the track at the other hand, and the tread is disposed on the keel. 
   
   
       20 . The treadmill according to  claim 18  wherein each of the exercise sets comprises a roller attached to keel and movable on the track.