Patent ID: 8753052

Claim:
A blind rivet for use in fastening two or more components together, the blind rivet comprising: a rivet body having a hollow sleeve and a flange located at a top end of the sleeve, and a mandrel defining a long axis and comprising a shaft portion extending from beyond the flange through the rivet body and a head integrally connected to the shaft portion, the head having a diameter greater than the inner diameter of the sleeve and being arranged adjacent to the sleeve at a bottom end of the sleeve opposite the flange; wherein the head of the mandrel defines a first maximum diameter in a first portion formed in a tip end distal from the shaft portion, and defines a second maximum diameter in a second portion formed on a root end proximal to the shaft portion and opposite to the tip end, the first maximum diameter perpendicular to and axially spaced from the second maximum diameter; and a first plan view of the head along the first maximum diameter displays a first concave curve open in the direction of the root end, the first concave curve defining a first boundary between a first head surface and a second head surface, and a second plan view of the head along the second maximum diameter displays a second concave curve open in the direction of the tip end, the second concave curve defining a second boundary between the second head surface and a third head surface.