Gimpel's set parts and assemblies for transformation of treadle lever rocking movement into rotary movement of bicycle drive shaft

摘要

The present invention is a removable device/mechanism which is installed onto a bicycle. The installed device assists a user in pedaling in a unique fashion which removes the stresses and forces of ordinary cycling. The movement of the pedals becomes such that force is caused only during half of the circumferential movement of each pedal, similar to a step/climbing machine. The movement is achieved by placing two shafts which move alongside planes parallel to the user during motion, the two shafts being interconnected at their top and bottom ends. The bottom ends are connected to the gears and chain of the bicycle as described herein. The top ends are connected to a reverse mechanism as described herein. The combination of elements assists the user by turning an ordinary bicycle into a more relaxed use machine, allowing more people to use bicycles.