Newfrey Lcc

Stephen Morris

Steven Victor Jones

James Hughes

Dan Smith

There is provided a blind rivet () comprising an axially extending hollow tubular body () having a tail end face () at one end and a pre-formed radially enlarged flange () at the other end, together with a mandrel () having a stem () which extends co-axially though the body () and having enlarged head adjacent the tail end () of the body, the stem having a weakened region immediately adjacent the head, whereby the mandrel head having an outer diameter greater than an outer diameter of the body, usually by between 4% and 9%, and which has a uniform conical shoulder () extending between the outer diameter of the head and the stem (), so as to exert a setting force having an axial component for compressing the rivet body axially and an angular component effecting conical deformation of the tail end radially.

Blind rivet

A self-piercing blind fastener comprising a mandrel having an elongate cylindrical shell mounted on a stem of such mandrel and which extends co-axially about a central elongate axis of the blind fastener, the shell having a radially extending flange at one end and a tail-end portion at the opposite end for insertion through a workpiece, the mandrel further having a mandrel head in operative engagement with the tail-end of the fastener for transmitting a setting force thereto during setting of such fastener, the blind fastener further comprising a longitudinally extending indenting member extending co-axial with and away from the tail-end of the blind fastener, which indenting member having a cross sectional area less than the cross sectional area of the shell.

Self-piercing blind rivet

There is provided a blind rivet including an axially extending hollow tubular body having a tail end face at one end and a pre-formed radially enlarged flange at the other end, together with a mandrel having a stem which extends co-axially though the body and having enlarged head adjacent the tail end of the body, the stem having a weakened region immediately adjacent the head. There is also provided a method of fastening at least two workpieces using such a blind rivet, including providing the blind side of the workpieces with a countersunk region to accommodate the conically deformed tail end of the body after setting, substantially flush therewith.

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Sutton Coldfield, United Kingdom

Stephen Morris