Drive system for bicycles and other apparatus

A drive system for driving a driven device such as the rear wheel of a bicycle or a flywheel or the like comprising;

• input force applying means for applying force to the drive system;
• rotatable output force transfer means for transferring output force to the driven device;
• mounting means for rotatably mounting said rotatable output force transfer means and enabling rotation thereof relative to said mounting means in both forward and rearward directions;
• input force transfer means for transferring input force from said input force applying means to said rotatable output force transfer means to cause rotation thereof in the forward direction and transfer of output force to the driven device;
• input-output force correlation means operatively associated with said input force transfer means for correlating input-output forces by forward and rearward relative rotative displacement of said rotatable output force transfer means and said input force transfer means during each revolution of the drive system;
• and
• locking means operatively associated with said drive system and being movable between a locked position and an unlocked position relative thereto for selectively disabling and enabling said input-output force correlation means relative to said rotatable output force transfer means.