Bicycles wheel driving device for use by cyclist, has two extended cranks vertically displaced in opposite direction by certain degrees, by vertical movement of two pedals, to alternatively drive dual gear that drives axles of plates

摘要

The device has two extended cranks (1) vertically displaced in opposite direction by 90 degrees, by vertical movement of two pedals (2), to alternatively drive a dual gear (14). The gear drives axles of plates (4) arranged on an intermediate axle fixed on a frame tube (5). The displacement of the cranks moves a lever system coupled to an elastomer cylinder automatically driving back the cranks to a horizontal equilibrium position.