Security nuts

Details Security nuts Security nuts

1993-08-02

1994-08-23

Wilson, Neill R.

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

Externally threaded fastener element, e.g., bolt, screw, etc.

Head driving structure

411427, 411911, F16B 2300, F16B 3506

Patent

active

053402561

ABSTRACT:
A security nut, which can be tightened on to a bolt but not slackened, has a body which is dome shaped and through which a threaded bore passes. The external dome-shaped surface of the body is provided with grooves which have diverging walls which can be engaged by driving faces of a socket tool to tighten the nut but not to slacken it. The dome-shape of the body makes it virtually impossible to grip it to slacken the nut.

REFERENCES:
patent: 1506500 (1924-08-01), Ripamonti et al.
patent: 3134292 (1964-05-01), Walton
patent: 3302672 (1967-02-01), Walton
patent: 4429599 (1984-02-01), La Sante, Sr.
patent: 5033501 (1991-07-01), Stehling

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