Patent ID: 7806808

Claim:
An athletic apparatus comprising: a frame for placement on level ground; a pair of left and right tracks of the same structure fixed to the frame at a predetermined angle to the ground; the tracks being linear and non-parallel; a pair of left and right pedal mechanisms of the same structure including pedals for being tread by a user's feet and being installed to the left and right tracks respectively; the pedal mechanisms being movable up and down along the tracks; a pair of left and right rocker arm mechanisms of the same structure being movably installed to the frame and the left and right pedal mechanisms so as to be moved identically with the pedal mechanisms; wherein by the tracks being non-parallel, the users experiences the most natural exercise of the feet; and wherein a first transmitting mechanism is rotatably installed to an inclined supporting rod near a pulley below the upper ends of the tracks and a steel rope is wound around the pulley; two ends of the steel rope are connected to the left and right pedals respectively so that the pedals can be slid back and forth, up and down against each other alternately; and a second transmitting mechanism has two timing belts and an elastic belt linking the two timing belts; outer ends of the timing belts are connected to the lower ends of the rocker arms respectively so that the left and right rocker arm mechanisms can be swung back and forth alternately with an axle center of the axle rod; a shaft rod is installed to the frame; a belt wheel is installed to a middle position of the shaft rod, and two gear wheels are installed to two ends of the shaft rod; the gear wheels have single direction bearing; the timing belts clench the teeth of the gear wheels respectively; two wheels are pivoted to two ends of the front bottom rod, and the elastic belt linking the timing belts winds the wheels; by the linking of the second transmitting mechanism, the left and right rocker arm mechanisms can be moved back and forth against each other alternately; and wherein the first transmitting mechanism is rotatably installed to the tracks and are positioned to the pulleys of the tracks, respectively; the lower ends of the tracks are rotatably installed to an installation portions; the tracks are swingable along the axles of the installation portions, respectively; the upper ends of the tracks are retained by a screwing unit which is installed to the frame; the tracks are supported and positioned by the screwing unit so as to form with an incline angle with the ground.