Assembly of chain sprockets and cranks for bicycle
AssigneeShimano Industrial Company Limited
InventorTakashi Segawa
Life of this patent
Estimating the term…
Abstract
An assembly of chain sprockets and cranks for a bicycle, a plurality of which sprockets are formed of a punched metal plate and fixed at a predetermined interval to mounting arms. The arms are provided with a plurality of mounting seats formed inwardly stepwise from the utmost ends of the arms respectively so that each of the chain sprockets is fixed to each of the seats by means of a fixing means, whereby the assembly is inexpensive to manufacture by saving loss of materials, each sprocket can be changed independently, and the assembly is capable of preventing a driving chain from falling between the sprockets.
Claims7
An assembly of chain sprockets and cranks for a bicycle, comprising:
- a plurality of chain sprockets of different diameters, said chain sprockets being annular ring-like plate members with teeth on the outer periphery thereof and having mounting bores spaced circumferentially about said ring-like plate members;
- a plurality of mounting arms for fixing said chain sprockets thereto;
- and fixing means for fixing said chain sprockets to said mounting arms respectively, said mounting arms having bases connected together, each of said mounting arms extending radially outwardly from its base and terminating in a tip, each of said mounting arms having a plurality of seats formed therein at different radii from its base to its tip, each of said seats having a mounting bore aligned with one of the mounting bores on the appropriate diameter sprocket, whereby said chain sprockets are supported by each of said seats and fixed thereto by said fixing means.
Dependencies are inferred from the claim text.