A drive mechanism to enable a bicycle to coast forward or backward iincludes a ratchet ring that is directly coupled to a sprocket of the bicycle. A pawl housing is directly coupled to a crank axle of the bicycle. The housing includes a plurality of pawls that are distributed about a perimeter of the housing. The pawls are extendible outward from the perimeter of the housing to engage the ratchet ring to rotate the sprocket when the crank axle is rotated by forward pedaling. A clutch disk includes a plurality of radial projections that are each configured to extend outward a pawl of the plurality of pawls when that pawl is rotated to that radial projection by forward rotation of the crank axle. The clutch disk is coupled to a friction element that resists rotation of the clutch disk relative to a chassis of the bicycle.


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    Title :

    BICYCLE DRIVE MECHANISM TO ENABLE COASTING


    Contributors:
    COHEN ALON (author) / MAZAR TAL (author)

    Publication date :

    2017-04-13


    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 / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / F16H Getriebe , GEARING



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