Patent ID: 8297897
Filing Date: 2012-10-30
Classification: F16B

Abstract:
1. A blind rivet comprising: a hollow sleeve; a crimping ring; and a mandrel, received by the hollow sleeve and by the crimping ring, the mandrel comprising: at a first end, a head configured to bear against the sleeve, at a second end, a shank configured to receive a traction load from a tool, a breaking groove which breaks off when the traction load reaches a certain value, the breaking groove including a breaking groove bottom, a first breaking-groove-side extending from the breaking groove bottom toward the shank, a second breaking-groove-side extending from the breaking groove bottom towards the head, the first breaking-groove-side and a central axis of the mandrel defining a first angle, the second breaking-groove-side and the central axis defining a second angle, the second angle being greater than the first angle, and an embrittlement groove contiguous with the first breaking-groove-side, wherein the shank is preformed with a plurality of crimping grooves and is dimensioned in such a way that once the shank is broken off on the breaking groove, a portion of the crimping grooves extend beyond the sleeve, and the crimping ring is configured to crimp on the crimping grooves extending beyond the sleeve.