Bicycle rear hub drive mechanism

A method for decoupling driving elements from a bicycle wheel,

• comprising:
• providing a first shell rotatably attached to an axle, a cylinder member attached to the first shell, the cylinder member having a length, an axis being defined by a center line running through the length of the cylinder member, the first shell houses a first face gear, the first shell attached to a wheel;
• providing a second shell rotatably attached to the axle, the second shell having driving elements attached to its external surface, the second shell housing a second face gear;
• providing a plurality of coil members coiled to the cylinder member and attached to the second face gear by a protruding extension at one end of the plurality of coil members, the protruding extension having a length, an axis being defined by a center line running through the length of the protruding extension, the axis of the protruding extension being askew from the axis of the cylinder member, and the protruding extension penetrates at least one cavity on a face opposing a face with gear teeth of the second face gear, the at least one cavity having a length, an axis defined by a center line running through the length of the at least one cavity, with the axis of the at least one cavity being co-axial with the axis of the protruding extension, so that the second face gear can axially slide from the plurality of coiled members by a prismatic sliding effect of the at least one cavity at the protruding extension, due to a resultant common axis between the at least one cavity and the protruding extension being askew from the axis of the cylinder member;
• slowing a rotation speed of the second shell relative to the first shell during which the cylinder member and the plurality of coil members start to rotate relative to the second face gear;
• applying a rotational interference to the second face gear by the prismatic sliding effect of the at least one cavity of the second face gear at the protruding extension at one end of the plurality of coil members, as the cylinder member and the plurality of coil members rotate relative to the second face gear, so as to guide the second face gear to follow a path which induces an axial displacement away from the first face gear, the axial displacement co-axial with the axis of the cylinder member;
• decoupling the second face gear from the first face gear through the axial displacement of the second face gear;
• and
• decoupling the second shell from the first shell by the decoupling of the second face gear from the first face gear, allowing the driving elements to rotatably disconnect from the wheel.