Method and apparatus for machining components for stairs
Front derailleur for a bicycle
Bicycle derailleur having an improved mechanism for swinging a chain guide Patent #: 4286953
ApplicationNo. 06/388208 filed on 06/14/1982
US Classes:474/80, And including belt-shifter mechanism474/78Including belt shiftable axially from one to another surface of stepped pulley or coaxial pulleys of different diameter
ExaminersPrimary: Braun, Leslie A.
Assistant: Diehl, Dwight G.
Attorney, Agent or Firm
International ClassesB62M 9/12 (20060101)
B62M 9/00 (20060101)
Foreign Application Priority Data1981-06-17 FR
AbstractThe invention provides a mechanism which is simpler in construction, cheaper and easier to assemble. The derailleur mechanism is of the type comprising a movable device for guiding or shifting the chain connected to a support in such manner as to be displaced in translation with respect to the support by means of an actuating device. The movable device is connected to the support, on one hand, by a link and, on the other hand, by a pin-and-slot connection. The slot has the shape of an arc of a circle whose radius is equal to the distance between the two pivot pins of the link.