Bicycle rear derailleur
AssigneeShimano Inc.
InventorsSatoshi Shahana, Shinya Oseto, Kazuhiro Fujii
Life of this patent
Estimating the term…
Abstract
A derailleur includes a base member for attachment to a bicycle frame and a movable member supporting a chain guide such that the chain guide moves laterally to shift a chain among a plurality of gears. The base member has a laterally inner surface and a laterally outer surface, and it includes a projection extending from one of the laterally inner surface and the laterally outer surface for engaging a corresponding recess in the frame.
Claims57
A derailleur comprising:
- a base member for attachment to a bicycle frame, wherein the base member has a laterally inner surface and a laterally outer surface, wherein the base member includes a projection extending laterally outwardly for engaging a corresponding recess in the frame;
- and
- a movable member supporting a chain guide such that the chain guide moves laterally to shift a chain among a plurality of gears.
A derailleur apparatus comprising:
- a frame member having an axle opening for receiving an axle therethrough and a slot in close proximity to the axle opening;
- a base member attached to a laterally inner surface of the frame member, wherein the base member has a laterally inner surface and a laterally outer surface, wherein the base member includes a projection extending laterally outwardly into the slot in the frame member;
- and
- a movable member supporting a chain guide such that the chain guide moves laterally to shift a chain among a plurality of gears.
A derailleur adapted to be used with a frame member of a bicycle, wherein the frame member has an axle opening for receiving an axle therethrough and first and second prongs with corresponding first and second end faces, wherein the first and second prongs define a slot in close proximity to the axle opening and an opening extending through the first and second end faces, wherein the derailleur comprises;
- a base member with a projection dimensioned and positioned to fit into the slot in the frame member such that, when the derailleur is mounted to the frame member, the slot opens through the first and second end faces toward the base member;
- and
- a movable member supporting a chain guide and operatively coupled to the base member such that the chain guide moves laterally to shift a chain among a plurality of gears.
A derailleur comprising:
- a one-piece base member for attachment to a bicycle frame, wherein the base member comprises:
- a laterally inner surface;
- a laterally outer surface;
- a projection extending laterally from one of the laterally inner surface and the laterally outer surface for engaging a corresponding recess in the frame;
- and
- first and second coupling ears;
- a linkage mechanism coupled to the first and second coupling ears;
- and
- a movable member coupled to the linkage mechanism, wherein the movable member supports a chain guide such that the chain guide moves laterally to shift a chain among a plurality of gears.
A derailleur comprising:
- a one-piece base member for attachment to a bicycle frame, wherein the base member comprises:
- a laterally inner surface;
- a laterally outer surface;
- a projection extending laterally from one of the laterally inner surface and the laterally outer surface for engaging a corresponding recess in the frame;
- and
- a coupling ear;
- a link directly connected to the coupling ear;
- and
- a movable member pivotably coupled to the link, wherein the movable member supports a chain guide such that the chain guide moves laterally to shift a chain among a plurality of gears.
A derailleur comprising:
- a base member for attachment to a bicycle frame, wherein the base member comprises:
- a laterally inner surface;
- a laterally outer surface;
- a projection extending laterally from one of the laterally inner surface and the laterally outer surface, wherein the projection has elongated first and second side walls for engaging a corresponding slot in the frame;
- and
- a movable member supporting a chain guide and operatively coupled to the base member such that the chain guide moves laterally to shift a chain among a plurality of gears.
A derailleur comprising:
- a base member for attachment to a bicycle frame, wherein the base member comprises:
- a laterally inner surface;
- a laterally outer surface;
- a projection extending in a lateral direction from one of the laterally inner surface and the laterally outer surface for engaging a corresponding slot in the frame, wherein the projection has a shape that prevents the projection from rotating in the slot when viewed in the lateral direction;
- and
- a movable member supporting a chain guide and operatively coupled to the base member such that the chain guide moves laterally to shift a chain among a plurality of gears.
Dependencies are inferred from the claim text.