Patent ID: 9290236
Filing Date: 2016-03-22
CPC Classification: B62M,F16B

Claim Text:
1. A bicycle front derailleur comprising: a base member configured to be attached to a bicycle frame, a chain guide configured to engage a chain, a connecting structure that connects the chain guide to the base member such that the chain guide can move relative to the base member, an attachment structure detachably attaching the chain guide to the connecting structure, wherein the attachment structure includes a first attachment member that includes a first part and a second part, wherein one of the chain guide and the connecting structure is clamped between the first part and the second part, wherein the first part includes a tool engagement portion that faces an outside of the chain guide, wherein the first part of the first attachment member includes a shaft portion and a head portion and the second part of the first attachment member includes a head portion and a cylindrical portion having an end surface, wherein the head portion and the end surface are located on opposite ends of the cylindrical portion, wherein the shaft portion of the first part is threadingly received in the cylindrical portion of the second part so as to clamp the one of the chain guide and the connecting structure between the head portion of the first part and the end surface of the cylindrical portion of the second part, the cylindrical portion of the second part having a constant outer diameter extending from the head portion of the second part to the end surface of the cylindrical portion when the first part is threadingly received in the second part, wherein the first part of the attachment structure can be detachably attached from the second part, and wherein detachably attached comprises threadingly disengaging the shaft portion of the first part from the cylindrical portion of the second part and then threadingly reengaging the same shaft portion of the first part with the cylindrical portion of the second part, wherein the head portion of the first part of the first attachment member includes a protruding portion, wherein the cylindrical portion of the second part of the first attachment member includes a non-threaded portion that has a diameter that is larger than the shaft portion of the first part, and wherein the protruding portion is received in the non-threaded portion.