Tamper proof threaded fastener

Details Tamper proof threaded fastener Tamper proof threaded fastener

1996-10-04

1997-12-16

Wilson, Neill R.

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

Torque responsive nut or bolt driving connection

Frangible connection

411406, 411407, 411919, F16B 2300, F16B 3100

Patent

active

056977433

ABSTRACT:
A tamper proof threaded fastener construction (10) comprising a conventional elongated threaded fastener body member (20) having an enlarged head member (30) provided with a contoured and tapered frangible member (40) which is used to drive the fastener construction (10) in a rotatable fashion, and when the frangible member (40) is removed leaves an irregular surface (45) which prevents the fastener construction (10) from being rotatably driven in any direction.

REFERENCES:
patent: 1677269 (1928-07-01), Burghart
patent: 3343443 (1967-09-01), Moore
patent: 3812757 (1974-05-01), Reiland
patent: 4109691 (1978-08-01), Wilson
patent: 4171662 (1979-10-01), Simone et al.
patent: 4225165 (1980-09-01), Kesselman
patent: 4504180 (1985-03-01), Ishii et al.
patent: 4800787 (1989-01-01), Cerny
patent: 4809569 (1989-03-01), Erb
patent: 4948312 (1990-08-01), Jochum
patent: 5269208 (1993-12-01), Kolvites et al.

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