Patent ID: 9297450
Filing Date: 2016-03-29
CPC Classification: B62M,F16H

Claim Text:
1. A bicycle rear sprocket comprising: a sprocket body having a center rotational axis, a first side surface and a second side surface, the first and second side surfaces facing oppositely with respect to an axial direction of the bicycle rear sprocket, the first side surface being a smaller sprocket facing side of the sprocket body; and a chain engagement structure including a plurality of sprocket teeth extending radially outward from an outer periphery of the sprocket body, the sprocket teeth including a first shift tooth and a second shift tooth, the second shift tooth being positioned at a third tooth position in a downstream direction of a rotational driving direction of the bicycle rear sprocket with respect to the first shift tooth, the first shift tooth and the second shift tooth functioning as a shift tooth that is configured to catch a link of a bicycle chain as the bicycle chain moves from a smaller bicycle rear sprocket to the bicycle rear sprocket, the sprocket teeth further including either a first non-shift tooth having a first recess or a first toothless gap that is positioned in the downstream direction with respect to the first shift tooth and that is adjacent the first shift tooth, the sprocket teeth further including either a second non-shift tooth having a second recess or a second toothless gap that is positioned in the downstream direction with respect to the second shift tooth and that is adjacent the second shift tooth.