US Patent 10487915 Bicycle chain

A bicycle chain includes a plurality of link units in series connection, and each of the link units includes two outer link plates, two inner link plates, and a pin. Each outer link plate includes two outer plate end portions and an outer plate connecting portion between to the outer plate end portions, and each outer plate end portion has a bore. Each outer plate end portion of the outer link plate has two cut portions on an edge thereof. The cut portions of the outer link plates provides a space, which is helpful to derailing the chain onto another sprocket in a low interference and a fast and smooth way.