Fulcrum lever pedal bar bicycle

摘要

A bicycle with a driving train has a continuous chain connecting the spindle connected front sprocket to the rear one way engaging other way ratcheting sprocket situated at the rear wheel hub. Two long fulcrum lever pedal bars are pivoted about two-thirds away from its front end to a bicycle frame. A connecting rod is connected pivotally to the rear end of each fulcrum lever pedal bars. The other end of each connecting rods are connected pivotally to their sides spindle arms, which are connected opposite to each other to the spindle. A pedal is fitted at the front end of both fulcrum lever pedal bars. Whereby, when the pedal is at its top position the rider's foot presses the pedal, thus the drive train is in motion. The other pedal is making its way to the top position. Pressing the pedal alternatively keeps the bicycle in continuous motion.

主权项

1. A bicycle pedaling mechanism comprising: a fulcrum lever pedaling mechanism to torque a drive train of a bicycle, said pedaling mechanism comprising two long fulcrum lever pedal bars pivotally fulcrumed on a fulcrum pivoting shaft at about the center on a bicycle frame; wherein a rear of said fulcrum lever pedal bars are each movably fitted with a respective connecting rod; said connecting rods are each connected to a respective spindle arm, said spindle arms are each attached to a front sprocket wheel; said connecting rods coupled to both a spindle and said drive train of a bicycle via said respective spindle arms and said front sprocket wheel, a chain connected to both said front sprocket wheel and a rear sprocket wheel, said rear sprocket wheel is configured such that it engages when rotated in one direction and freewheels when rotated in an opposite direction, and a rear hub;
wherein the fulcrum pivoting shaft is located rearwards of the seat and above the front sprocket; wherein front ends of each of said fulcrum lever pedal bars are each fitted with a pedal and said spindle arms are mounted to said spindle in opposing direction to each other; wherein when the right side said spindle arm is at top dead center (TDC), the left side said spindle arm is at bottom dead center (BDC), and when the left side said pedal along with its front side of said fulcrum lever pedal bar is at its top position the left side said spindle arm is at BDC position and its said connecting rod is at about the one o'clock position or at an angle of about 30 degrees to the rear; wherein when said pedal is depressed and the rear of said fulcrum lever pedal bar is also getting lifted upwards and drawing said spindle arm towards the TDC position, said front sprocket wheel turns and makes the rest of said drive train turn a rear wheel which is at an end of said drive train, said rear wheel configured to be in frictional contact with the ground so as to cause said bicycle to achieve forward motion; and wherein continued forward motion is achieved by continuing to depress said left and right pedals alternatively.