Vertical pedal assembly for bicycle, has two carriages, one having ratchets driving chain using toothed wheels, where one wheel is integrated to flanges and force is vertically exerted on carriages through cranks fixed on carriages

摘要

The assembly has two rails (1, 2) on which two carriages (9, 13) move to and fro. The carriages are connected by a cord (4) traversing the rails on a pulley (15) under flanges (5). The carriage (9) has two rows of ratchets which drive alternately a tight chain (8) using two toothed wheels (6, 7), where the wheel (6) is integrated to the flanges. Force is vertically exerted on the carriages through cranks (18, 19) fixed on the carriages.