Patent ID: 7165710
Filing Date: 2007-01-23
Classification: B23K

Abstract:
1. A spin welding fastener for joining framing members together comprising: a metal pin having an axial axis, axially opposite first and second ends and a stem extending axially therebetween, a portion of said stem tapering as said stem extends between said first and second ends, said tapering changing an outer diameter of said portion of said stem, said first end adapted to be driven by a torque transmitting device, said second end being a tip having a flat portion substantially perpendicular to said axial axis, an outer portion of said tip tapering toward said flat portion, said tip and said stem adapted to penetrate the framing members, and said pin being adapted to be rotated relative to the framing members and to receive an axial force while rotating, application of said axial force and rotation of said pin causing said tip to melt a portion of the framing members, said tip and said stem to penetrate through said melted portion of the framing members, and said stem to bond with the framing members upon cessation of said rotation so that the framing members are joined together by said pin, wherein said stem has a radial diameter that increases as said stem extends from said second end toward said first end.