Improved rear hub chair protector
AssigneeShimano Industrial Company Limited
InventorMasashi Nagano
Life of this patent
Estimating the term…
Abstract
A rear hub for a bicycle, which has a hub shell supported rotatably to a hub shaft through a pair of bearings and which carries two or more sprockets at one axial end of the hub shell which are freely rotatable in one direction, is provided with a protector disposed axially outwardly the smallest diameter high speed sprocket. The protector has a diameter larger than the high speed sprocket, and is supported to a rear hub fixing member fixed to the hub shaft.
Claims6
In a rear hub for a bicycle, said hub comprising a hub shaft, a pair of bearings mounted to said hub shaft, a hub shell supported rotatably to said hub shaft through said bearings, a cylindrical driving member disposed at one axial end portion of said hub shell supporting a plurality of sprockets of different diameters, a unidirectional rotary transmission mechanism for transmitting driving force from said driving member to said hub shell, and a first and a second fixing member for fixing said bearings to said hub shaft, the improvement comprising a protector having an outer periphery larger in diameter than a first sprocket of said plurality of sprockets, said first sprocket being positioned at the axial outermost side of said hub shaft, said protector having at its center a fitting bore which fits onto said first fixing member, being arranged axially outwardly of said first sprocket and between it and a fork of a bicycle, and being supported to said first fixing member, said protector preventing a driving chain from disengaging from said first sprocket.
Dependencies are inferred from the claim text.