Patent ID: 7722303
Filing Date: 2010-05-25
Classification: B21J,F16B

Abstract:
1. A blind rivet operable for insertion into a workpiece having first and second exterior surfaces comprising: a body portion defining a through axis having a first end and a second end, the body portion including a radial flange formed at the first end and defining a bore extending through the body portion, said body further defining an annular groove on an exterior surface of the body portion, said groove spaced a predetermined distance apart from the radial flange and fully disposed in its entirety between the first and second exterior surfaces of the workpiece when the body portion is seated in the workpiece; and a mandrel including a mandrel head operable to engage the second end of the body portion, the mandrel head larger than the bore and coupled to a stem, the stem configured to pass through the bore and the flange to enable the body portion to engage the workpiece, wherein the radial flange includes a plurality of flat bearing surfaces generally parallel to the through axis adapted to be coupled to at least one tool for receipt of a predetermined torsional load at the radial flange, the load being applied generally perpendicular to the through axis, to cause annular failure of the body portion at the annular groove and separation of the body portion into two pieces at the annular groove.