Bicycle with pedal crank and crank pinion - involves pedal linked crank pinion of the telescoping type or double armed with arms spread apart

摘要

The pedal crank arms (PK) including the pedals (P) displaced through 180 deg. to one another and transmitting the drive torque to the rear wheel (RR) together with two likewise displaced crank pinions (PK) as two sided levers are linked to a link bearing on the front pinion end. The area of the rear end of the crank pinion (KS) is guided in rocker beams (V) with two superimposed rollers (S), the rocker axis (Z) of which can pivot backwards and forwards and upwards and downwards. The up and down pivoting rocker beam with its fixed rocker axis (Z) is rotatable and fitted to the frame and projects so far in the centre of the bicycle fork (RG) that the round rocker axis is aligned with the drive chain (AK) of the bicycle. USE - A bicycle with a pedal crank and various alternative crank pinion arrangements.