F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/138, 26/97
F16B 19/04 (2006.01) B21D 39/00 (2006.01) B21J 15/02 (2006.01) F16B 19/06 (2006.01)
Patent
CA 1093354
ABSTRACT OF THE DISCLOSURE An improvement in rivet type fastens is used in combination with a workpiece having a bore, a first counter- bore, and a second counterbore which is frusto-conical and tapers forwardly between the first counterbore and the bore and toward the bore. The improvement includes a rivet having an axially extending shank received in the workbore and defining an axis. The rivet includes a head having an end face, a first section located forwardly of said end face, and a second and forwardly tapered frusto-conical section located forwardly of the first section. The first section has n initial undeformed outer surface of a diameter which is less than but about the same as the initial diameter of the first counterbors. The rivet first section is radially deformed to have peripheral engagement with the first counterbore, and the head end face is substantially flush with the work surface. The head end face typically initially defines an undeformed ring-shaped dome extending about the rivet axis and in substantial axial alignment with the outer surface of the shank.
287877
Briles Franklin S.
Gowling Lafleur Henderson Llp
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