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Direct drive bicycle

  • US 6,079,726 A
  • Filed: 05/13/1997
  • Issued: 06/27/2000
  • Est. Priority Date: 05/13/1997
  • Status: Expired due to Term
First Claim
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1. A direct drive bicycle comprising:

  • a bicycle frame having a seat tube which defines opposed ends and a pivoting rear assembly which extends rearwardly from the seat tube;

    a rear wheel rotatably connected to the rear assembly;

    a housing attached to one of the ends of the seat tube and disposed forwardly of the rear wheel;

    a variable rate transmission unit rotatably mounted within the housing, the transmission unit having input and output shafts which are simultaneously rotatable at differing rotational speeds;

    a crank axle rotatably mounted within the housing; and

    a chain wheel attached to the crank axle;

    said chain wheel being mechanically coupled to the input shaft and the output shaft being mechanically coupled to the rear wheel such that the rotation of the chain wheel facilitates the rotation of the rear wheel.

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