Mechanism to convert the front idle wheels of bicycles in general into drive wheels

摘要

Mechanism to temporarily convert the front wheel of bicycles into a driving wheel, comprising a lever (5) hinged in front of and on top of the frame; the handle-bar -E- is fixed to said lever together with a catch (14), with a mobile stopping tooth which cooperates with stopping means (11, 15) attached to the steering column (10), to block/release the handle-bar which can be swung on a vertical plane; transmission organs, comprising a chain (7) which engages a free wheel (8) coaxial and fixed to the front wheel -I-, transmit the alternate movement given to the handle-bar to the said free wheel; elastic return means for returning to the original position of the handle-bar are also provided. Control means (16, 17) for the stopping tooth of the catch (14) are applied to the handle-bar.