Disclosed is a crank variable-speed gear device (100) wherein the gear ratio can be increased to 1.6:1 to 1.8:1 through a gear assembly and a latch assembly, and the gear ratio can also be changed to 1:1, if necessary, thereby providing an excellent transmission efficiency, facilitating the manipulation thereof, and making it possible to provide a compact and lightweight bicycle.
Crank variable-speed gear device for increasing rotational power
2025-01-14
Patent
Electronic Resource
English
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
CRANK VARIABLE-SPEED GEAR DEVICE FOR INCREASING ROTATIONAL POWER
European Patent Office | 2022
|CRANK VARIABLE-SPEED GEAR DEVICE FOR INCREASING ROTATIONAL POWER
European Patent Office | 2021
|CRANK VARIABLE-SPEED GEAR DEVICE FOR INCREASING ROTATIONAL POWER
European Patent Office | 2022
|CRANK VARIABLE-SPEED GEAR DEVICE FOR INCREASING ROTATIONAL POWER
European Patent Office | 2020
|Crank variable speed gear apparatus for increasing a rotational force
European Patent Office | 2021
|