Patent ID: 7938310

Claim:
A welded assembly formed via a spin welding process, the assembly comprising: a cylinder having a flow pattern formed by cooling a plastic outflow of a molten portion of the cylinder during the spin welding process; a disc having an opening for receiving the cylinder, a circumferential groove defining an annular shelf, and a plurality of teeth each at least partially enveloped by the plastic outflow of the cylinder; and a welded joint formed along an interface between the cylinder and the disc; wherein the flow pattern is positioned at least partially within the circumferential groove and at least partially underneath the annular shelf to thereby form each of a first interlocking feature between the cylinder and the disc that minimizes an axial motion of the cylinder with respect to the disc, and a second interlocking feature between the plurality of teeth and the flow pattern that minimizes a relative rotation of the cylinder and the disc.