Pedal drive

A rotational drive comprising:

• a drive wheel rotatable about a drive axis;
• a crank system including at least one crank end, the crank system being rotatable about the drive axis for rotatably driving the drive wheel with rotation of the at least one crank member about the drive axis, the drive wheel also being capable of rotating relative to the crank system in one direction, the crank system capable of allowing movement of said at least one crank end radially inward and outward relative to the drive axis;
• an auxiliary transmission system coupled between the crank system and the drive wheel for further rotatably driving the drive wheel with at least one of the radially inward and outward movement of said at least one crank end;
• and
• a clutch system coupled between the crank system and the drive wheel for allowing the auxiliary transmission system to rotatably drive the drive wheel with the at least one of the radially inward and outward movement of said at least one crank end.

A method of rotatably driving a drive sprocket about a drive axis comprising:

• providing a pedal system including at least one pedal;
• rotatably driving a drive sprocket about a drive axis with rotation of the at least one pedal about the drive axis, the drive sprocket also being capable of rotating relative to the pedal system in one direction;
• allowing movement of said at least one pedal radially inward and outward relative to the drive axis;
• and
• further rotatably driving the drive sprocket with at least one of the radially inward and outward movement of said at least one pedal with an auxiliary transmission system coupled between the pedal system and the drive sprocket, a clutch system coupled between the pedal system and the drive sprocket allowing the auxiliary transmission system to rotatably drive the drive sprocket with at least one of the radially inward and outward movement of said at least one pedal.

A method of rotatably driving a drive wheel about a drive axis comprising:

• providing a crank system including at least one crank end;
• rotatably driving the drive wheel with rotation of the at least one crank end about the drive axis, the drive wheel also being capable of rotating relative to the crank system in one direction;
• allowing movement of said at least one crank end radially inward and outward relative to the drive axis;
• and
• further rotatably driving the drive wheel with at least one of the radially inward and outward movement of said at least one crank end with an auxiliary transmission system coupled between the crank system and the drive wheel, a clutch system coupled between the pedal system and the drive wheel allowing the auxiliary transmission system to rotatably drive the drive wheel with at least one of the radially inward and outward movement of said at least one crank end.