Patent ID: 7749119

Claim:
A device for forming a link of a bicycle chain, the device comprising: a guide element which has a first end for insertion through aligned apertures in a pair of opposed plates, a body portion that is substantively equal in diameter to the apertures in the opposed plates and a second end having a projection which has a diameter that is less than the diameter of the apertures, wherein the second end projection includes a circumferential groove section at a first end proximate to the body portion and a chamfered portion at a second outer end thereof; and an articulation pin with a first end that defines a recess that mates with and entirely encloses the guide element projection in a sliding engagement that is capable of being reversed so that the pin is separated from the projection, after the articulation pin inserted within the aligned apertures of said opposed plates and the articulation pin remaining in the apertures, and a second end which is of sufficient diameter to radially expand an aperture in one of the opposed plates during the insertion of the articulation pin.