Patent ID: 8820852
Filing Date: 2014-09-02
Classification: B62M,F16H

Abstract:
1. A sprocket mounting carrier assembly for a bicycle for carrying a first sprocket having a central hole with a bounding wall that has at least four first cams, the at least four first cams having tops defining innermost curved surfaces of the at least four first cams, the innermost curved surfaces having a first top diameter, the sprocket mounting carrier assembly comprising: a sprocket mounting carrier having a cylindrical body having an outside with an outside diameter; at least four first grooves in the outside of the cylindrical body, the at least four first grooves having bottoms, defining innermost curved surfaces of the at least four first grooves, wherein the bottoms have a first bottom diameter whereby the first cams engage with the first grooves and/or the bounding wall engages with the outside, so that the first sprocket both in the radial direction and in at least one tangential direction cannot move relative to the sprocket mounting carrier; a second sprocket being mounted on the sprocket mounting carrier, the second sprocket having a further central hole having a bounding wall with at least six second cams projecting radially inward; wherein the at least six second cams having tops defining innermost curved surfaces of the at least six second cams, the tops of the at least six second cams each having a second top diameter; wherein the outside of the cylindrical body has at least five second grooves having bottoms, defining innermost curved surfaces of the at least five second grooves, wherein the bottoms have a second bottom diameter, wherein the first bottom diameter is smaller than the second bottom diameter; and wherein second grooves engage with the second cams, and/or the bounding wall of the further central hole engages with the outside so that the second sprocket both in the radial direction and in at least one tangential direction is captured by the sprocket mounting carrier causing them to rotate together.