Patent ID: 7429234

Claim:
An oval track stepper comprising: a main frame; a head frame attached to said main frame; left and right stepping rods being alternately arranged; left and right vertical swing rods each having a bottom portion respectively coupled to a front end of said left and right stepping rods; a freewheel set being linked to the rear ends of said left and right stepping rods at an eccentric position; and a damping device being mounted extending at said left and right stepping rods with said freewheel set, said rear ends of said left and right stepping rods being linked via a coupler, said coupler being a belt pulley set, said belt pulley set comprising: a shaft lever; a first pulley and a second pulley at opposite sides of said shaft lever; a first drive belt linking the rear end of said left stepping rod to said first pulley; and a second drive belt linking the rear end of said right stepping rod to said second pulley.