Patent ID: 7438658

Claim:
A bicycle front derailleur comprising: a base member configured to be fixedly coupled to a bicycle frame; a movable member having a chain guide portion; and a linkage assembly coupled between the base member and the movable member to move the chain guide portion between a retracted position and an extended position, the chain guide portion including an inner chain guide member, an outer chain guide member non-movably coupled to the inner chain guide member and a pushing element with a contact surface, the outer chain guide member being spaced laterally outwardly from the inner chain guide member to form a longitudinally extending chain receiving slot between opposing inner and outer laterally facing surfaces of the inner and outer chain guide members, the pushing element being movably coupled to the inner chain guide member and activated by a chain to move relative to the inner chain guide member from a first position with the pushing element at rest to a second position, with the contact surface moving both longitudinally and laterally outwardly into the chain receiving slot toward the outer chain guide member as the pushing element moves from the first position to the second position.