Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element – Having plastically flowable or deflectable end – e.g. – rivet,...
Patent
1991-03-22
1992-07-14
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element
Having plastically flowable or deflectable end, e.g., rivet,...
411504, 295241, 295252, F16B 1906, B21D 3900
Patent
active
051297710
ABSTRACT:
A workpiece having a bore, and a counterbore which is frusto-conical and tapers forwardly between a side of the workpiece and the bore, and toward the bore, a metallic rivet having an axially extending shank received in the workpiece bore and defining an axis; the rivet including a head having an end face and a forwardly tapered frusto-conical section located forwardly of the end face; the periphery of the head end face being substantially flush with the work surface, the end face forming a dome protruding axially in a rearward direction, the dome being generally ring-shaped and extending about the axis in substantially axial alignment with the outer surface of the shank; the rivet head having a peripheral side wall spaced radially from a side wall defined by the workpiece counterbore, and the space between the side walls having a volume A; the dome having a metallic volume B; and wherein the volume B exceeds volume A, such that when the dome is flattened during rivet deformation, the rivet head side wall is radially expanded into volume A and pushes outwardly against the workpiece counterbore side wall to deform the latter radially outwardly; and the radio B/A being within the range 1.20:1 and 70:1.
REFERENCES:
patent: 2237338 (1939-02-01), Dale
patent: 3680429 (1972-08-01), Briles
patent: 3927458 (1975-12-01), Speakman
patent: 4000680 (1977-01-01), Briles
patent: 4051592 (1977-10-01), Briles
patent: 4086839 (1978-05-01), Briles
patent: 4159666 (1979-07-01), Briles
Briles Rivet Corporation
Haefliger William W.
Wilson Neill R.
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