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Human powered vehicle drive system

  • US 20080073869A1
  • Filed: 09/26/2007
  • Published: 03/27/2008
  • Est. Priority Date: 09/26/2006
  • Status: Abandoned Application
First Claim
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1. A human powered vehicle drive system comprisingat least one drive lever, the drive lever pivotally mounted relative to a vehicle frame and pivotable about a drive-lever pivot in a power stroke direction and a recovery stroke direction opposite the power stroke direction;

  • a drive rotor rotatably mounted with respect to the vehicle frame, the drive rotor operatively connected to the drive lever and constrained to rotate in a driving direction with respect to the vehicle frame when a power stroke is applied to the drive lever; and

    a power-stroke assisting spring providing a power-stroke assisting torque to the drive lever about the drive lever pivot in the power-stroke direction.

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