US Patent:
20030178807, Sep 25, 2003
Inventors:
Robert Drymalski - Chicago IL, US
International Classification:
B62D001/16
Abstract:
The present invention provides a manually powered rowing vehicle. In one embodiment, a chain wraps around a portion of first and second free-wheel wheel sprockets, which can spin freely in one direction but not the other. The first free-wheel drive sprocket drives a rear wheel. The second free-wheel drive sprocket connects to one end of a lever arm, which pivotally connects to a frame. When the rider pulls the other end of the lever arm towards their body, the first free-wheel drive sprocket grabs the chain and pulls the chain forward. The chain in turn pulls the second free-wheel drive sprocket, which rotates the rear wheel forward. When the rider pushes the lever arm away from their body, the first free-wheel drive sprocket spins freely to allow the lever arm to return to the pull position without moving the linked chain or the vehicle.