| 摘要 |
A pedal apparatus operatively connectable for powering a bicycle or the like vehicle comprising an axle rigidly affixed to the vehicle frame and independently rotatable left and right pedal hubs with attached pedals rotatably mounted on the axle such that the pedal apparatus when taken together with a synchronizer for synchronizing the rotation of the left and right pedal hubs attached to the bicycle frame, and extender for the pedals operatively interconnected with each of the pedal hubs extends the distance between the rigidly affixed axle and the pedals during a portion of each respective pedal stroke and contracts the distance on another portion of each pedal stroke.
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