Eastener for structures made of composite materials

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Member preassembled with substructure at through-passage or...

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411180, 411399, 411413, 4034081, F16B 3900, F16B 2300

Patent

active

048159077

ABSTRACT:
A fastener and a joint including the fastener, wherein the material in which the fastener is set is a composite. The fastener has a shank with an external helical rib that makes a slightly tighter than net to a moderate interference fit in a cylindrical wall of the hole. The rib has a form whose maximum radial protrusion is flat or convex, and which extends away from its maximum protrusion as a convex curve, devoid of sharp cutting edges. Voids between the convolutions of the rib are adequate to receive displaced material of the hole wall.

REFERENCES:
patent: 3418012 (1968-12-01), LaTorre
patent: 3630253 (1971-12-01), Sherman
patent: 3661406 (1972-05-01), Mele
patent: 3834438 (1974-09-01), Ziaylek, Jr.
patent: 3865006 (1975-02-01), Massoney
patent: 4097168 (1978-06-01), Pagel

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