Bicycle crank driven chain wheel assembly
Chain drive arrangement
Cluster sprockets for bicycle transmissions and other prime...
Gear crank apparatus for a bicycle
Mechanism for moving gripper and adjusting loci of its motions i
Noncircular drive
Power transmission mechanism
Rope or chain hauling pulley
Synchronous belt drive system
Synchronous drive apparatus and methods
Timing chain drive system
Timing chain drive unit
Torque reactive tension mechanism and method