Front derailleur with independently movable chain guide plates

Front derailleur with protective plate and connecting band

Front speed changing device

Gas actuated derailleur having an indexing mechanism for setting

Gas actuated derailleur having an indexing mechanism for setting

Gas actuating device with an exhaust passage that prevents conta

Gas actuating mechanism for a bicycle derailleur

Gear change system

Gear shift device for bicycles

Gear shift device for bicycles

Gear shifting system for derailleur equipped bicycle

Gear-change system including a sensor device for detecting...

Gear-shift control bicycles and similar vehicles

Gear-shifting apparatus for a bicycle, and bicycle...

Gearshift for bicycles

Guiding and actuating mechanism in particular for a bicycle dera

High-efficiency, high-speed control unit for chain shifter

Homogeneous speed-variating means as eccentrically operated

Horizontally disposed bicycle derailleur

Hybrid spring for bicycle derailleurs