Blind fastener assembly

Details Blind fastener assembly Blind fastener assembly

1984-02-17

1986-04-01

Dorner, Kenneth J.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Frangible member

411 18, 411 44, 411 55, F16B 1304

Patent

active

045794910

ABSTRACT:
A blind fastener assembly is disclosed, which is suitable for use in joint assemblies including advanced composite materials. The fastener assembly includes a pin, an expander, a sleeve, and an expandable washer, each of which have an initial diameter which permit them to pass through a hole in the workpiece. The washer is mounted about the pin shank between the sleeve and a tapered nose portion of the expander. The fastener assembly is inserted in a hole in the workpiece so that the expander head abuts the workpiece. Rotation of the pin causes the sleeve to force the washer to slide over the tapered nose portion of the expander causing it to expand and abut the blind side of the workpiece. In one embodiment of the invention the pin threadably engages the expander, and the head of the pin is positioned on the blind side of the workpiece. The washer is initially seated in a groove in the pin shank. Rotation of the pin causes its head and the sleeve to advance toward the workpiece, and the washer is forced from the groove by the sleeve causing it to partially expand. Expansion is completed when the sleeve forces the washer over the tapered nose portion of the expander. In a second embodiment the washer is carried on the pin shank and is expanded over the tapered nose portion by rotation of the pin, causing the sleeve to force the washer toward the blind side of the workpiece as in the first embodiment.

REFERENCES:
patent: 494745 (1893-04-01), Phillips
patent: 2632354 (1953-03-01), Black
patent: 2868056 (1959-01-01), Torre
patent: 3078002 (1963-02-01), Rodgers
patent: 3152375 (1964-10-01), Blakeley
patent: 3192820 (1965-07-01), Pitzer
patent: 3657955 (1972-04-01), McKay
patent: 3657956 (1972-04-01), Bradley et al.
patent: 4033223 (1977-07-01), Wilson
patent: 4142439 (1979-03-01), Landt
patent: 4364697 (1982-12-01), Binns
patent: 4376604 (1983-03-01), Pratt et al.

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