Patent ID: 7717447
Filing Date: 2010-05-18
Classification: A61G

Abstract:
1. A propulsion apparatus mountable to a vehicle, the vehicle comprising at least one ground engaging wheel having an axis of rotation and the propulsion apparatus comprising; a hub portion adapted to be statically attached at a location remote from said axis to at least one of a rim of said wheel and a structural member projecting from a plane defined by said wheel, the structural member being rigidly attached to the wheel; a lever arm pivotal about an axis coincident with said rotational axis of said wheel; and a drive mechanism interposed between said hub portion and lever arm such that pivotal movement of said lever arm about said axis causes said hub portion to rotate thereby propelling the vehicle; wherein said hub portion carries means for location of said lever arm such that the axis of rotation of the lever arm is coincident with the axis of the wheel.