Patent ID: 7273338
Filing Date: 2007-09-25
Classification: F16B,Y10T

Abstract:
1. A blind rivet comprising a tubular shell and mandrel in combination, the tubular shell having a single bore of substantially uniform diameter and a pre-formed radial head, the mandrel comprising a stem having an outer diameter substantially equal to the diameter of the bore, and a radially-enlarged head which in use forms a blind head to the shell to set the rivet, in which the head of the mandrel is formed with a plurality of depressions the bases of which lie on a notional circle having a diameter which is less than the stem of the mandrel and which define protrusions which extend radially beyond the bore of the shell, the protrusions being defining a maximum outer diameter of the head which is adapted to be drawn through the shell to, both deform the tubular shell to form the blind head and displace material from the shell into the depressions.