Patent ID: 6340338
Filing Date: 2002-01-22
Classification: B62M

Abstract:
A sprocket for a multi-stage sprocket assembly of a bicycle comprising:a sprocket body having a first axial side and a second axial side; and a plurality of circumferentially spaced teeth extending radially and outwardly from an outer periphery of said sprocket body, said teeth including a plurality of up shift teeth including a first up shift tooth, a second up shift tooth located adjacent said first up shift tooth and a third up shift tooth located adjacent said second up shift tooth, said first, second and third up shift teeth being so dimensioned to maintain alignment of a bicycle chain to prevent an up shifting of the chain when an outer link plate of the bicycle chain meshes with said second up shift tooth, and to shift the bicycle chain when an inner link plate meshes with said second up shift tooth along a first up shift path.