A bicycle crank 1 includes a base arm 200 positioned on an outside of a chain wheel 10 and connected at one end to the chain wheel 10, wherein the base arm 200 is rotatable synchronously with the chainwheel 10; a base sprocket 300, fixed to the base arm 200 and facing in the chainwheel 10; an outer sprocket 400, rotatably connected to the other end of the base arm 200 via an outer spindle 410; a transmission component 500 rotatably connected to the base sprocket 300 and the outer sprocket 400; and an outer arm 600, having one end rotatably connected to the outer spindle 410 and rotatable synchronously with the outer sprocket 400 and the other end rotatably connected to a pedal 610. The outer arm 600 may be set at an angle elevated from the horizontal by 18 or 36 degrees.


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    Title :

    Bicycle power-saving crank


    Contributors:

    Publication date :

    2025-04-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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