Blind fastener

Details Blind fastener Blind fastener

1992-11-24

1994-02-15

Wilson, Neill R.

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

Having separate expander means

Frangible member

411 45, 411 70, 295241, 295252, F16B 1304, F16B 1306, B23P 1102

Patent

active

052861511

ABSTRACT:
A fastener mandrel has formed on one end a shoulder and a twisted, generally rectangular shaped head adjoining the shoulder. In setting the fastener in a workpiece, the shoulder enlarges the end of a tubular rivet and clamps workpieces together in combination with a preformed head on the other end of the rivet. The mandrel head deforms the rivet tail into a twisted appearing shape with a somewhat elliptical cross-section that partially encloses the mandrel head to provide good stem retention and prevent axial looseness. A plurality of axial ribs on the mandrel stem are drawn into a reduced diameter section of the rivet head end when the rivet is set, thereby providing additional stem retention and torsional interference.

REFERENCES:
patent: 2558623 (1951-01-01), Keating
patent: 3047181 (1962-07-01), Heidenwolf
patent: 3073205 (1963-01-01), Siebol
patent: 3136204 (1964-06-01), Reynolds
patent: 3286580 (1966-11-01), Jeal
patent: 3850021 (1974-11-01), Binns
patent: 3880042 (1975-04-01), Binns
patent: 4211145 (1980-07-01), Dolch
patent: 4236429 (1980-12-01), Dolch
patent: 4904133 (1990-02-01), Wright
patent: 5006024 (1991-04-01), Siebol
patent: 5102274 (1992-04-01), Norton et al.

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