Patent ID: 8235850

Claim:
A multiple sprocket assembly for a bicycle includes a larger diametrical sprocket and a smaller diametrical sprocket, with the larger diametrical sprocket including at least one auxiliary guiding portion for facilitating a shift of a bicycle chain from the smaller diametrical sprocket to the larger diametrical sprocket, with the bicycle chain including a plurality of inner links and a plurality of outer links alternating the plurality of inner links, with each inner link having two inner plates and each inner plate having a profile and two connection ends, with the two inner plates joined by two connectors at the connection ends, with each outer link having two outer plates, with each outer plate having a profile and two connection ends, with the two outer plates joined by two connectors at the connection ends of the two outer plates, and the at least one auxiliary guiding portion comprising: a guiding recess inset on a lateral side of the larger diametrical sprocket and including a bottom side extending on the lateral side, with the bottom side having an extent up to an outer edge of the larger diametrical sprocket, with the outer edge including a plurality of teeth formed thereon, with the guiding recess further including a peripheral edge substantially transverse to the bottom side and defining first, second and third sections in which one of the plurality of outer links and one of the plurality of inner links is received successively, and with the one outer link having the two outer plates each with a substantially half profile or otherwise the one inner link having the two inner plates each with a substantially half profile received by the peripheral edge; and a diverting recess inset on the lateral side of the larger diametrical sprocket for avoiding the bicycle chain wearing the lateral side upon the shift of the bicycle chain from the smaller diametrical sprocket to the larger diametrical sprocket, with one of the plurality of outer links or one of the plurality of inner links received in the periphery edge of the guiding recess, wherein the larger diametrical sprocket includes a portion of the lateral side defined as a shifting plate interconnecting the diverting recess and the guiding recess.