Patent ID: 9150277
Filing Date: 2015-10-06
Classification: B62M,Y10T

Abstract:
1. A bicycle crank assembly comprising: a crank arm; and at least one sprocket having a rotational center axis and a plurality of teeth formed about a periphery of the at least one sprocket, the plurality of teeth including a set of regular teeth and a set of first and second teeth, the first teeth having a first chain engaging tooth width for engaging with an outer link of a bicycle chain, the second teeth having a second chain engaging tooth width for engaging with an inner link of the bicycle chain, the first chain engaging tooth width being greater than the second chain engaging tooth width, the regular teeth having a third chain engaging tooth width being smaller than the first chain engaging tooth width, the regular teeth including at least three consecutive teeth centered in at least one of a top dead center area and a bottom dead center area with respect to the crank arm, the first and second teeth being disposed between the top dead center area and the bottom dead center area with respect to the crank arm.