Patent ID: 7468022

Claim:
A leg exercise device having a bidirectional linkage single damping mechanism comprising: at least one pivoting foot support which pivots about a treading rotation axis; a support frame, defining a grounding portion and a vertical frame; a closed loop drive element, arranged at a preset location of said support frame and having a first section and a second section which are movable in opposite directions; a brake swinging arm, provided with a coupling end and a swinging end, said coupling end being connected to a treading rotation axis, said swinging end being connected to either said first section or said second section of said close loop drive element; a first drive pulley, being driven by said first section of said circular drive element, and having a first drive axle extended from a center of said first drive pulley; a second drive pulley, being driven by said second section of said closed loop drive element, and having a second drive axle extended from a center of said second drive pulley; a bidirectional drive pulley assembly, comprising: a first rotary pulley, a second rotary pulley arranged at intervals, and a drive element for synchronous motion of the first and second rotary pulleys, said first rotary pulley being linked to said first drive axle of said first drive pulley via a first unidirectional bearing, said second rotary pulley being linked to said second drive axle of said second drive pulley via a second unidirectional bearing the first or second rotary pulley having a coupling wheel at one side thereof; and a damping wheel assembly, connected with said coupling wheel of bidirectional drive pulley assembly via belt or chain, said damping wheel assembly being driven by said bidirectional drive pulley assembly.