Anti-tamper nut

Details Anti-tamper nut Anti-tamper nut

1988-10-17

1990-01-30

Smith, Gary L.

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

Internally threaded fastener element, e.g., nut, etc.

Multipart

411910, 411431, 70239, F16B 4100

Patent

active

048970085

ABSTRACT:
A locknut including an annular locknut body having a threaded inner surface and an outer surface, a locknut shroud rotatably mounted on the locknut body and having an inner surface facing the outer surface of the locknut body, an annular ridge on the outer surface of the locknut body defining a first shoulder, a second shoulder within the annular shroud, an O-ring mounted on an inclined surface of the locknut body and bearing against an inclined surface on the annular shroud to force the first and second shoulders into abutting engagement, an annular space between the inner surface of the annular shroud and the outer surface of the locknut body, and a plurality of lobes on the outer surface of the locknut body and located in the annular space for receiving a mating key.

REFERENCES:
patent: 1447564 (1923-03-01), Norlund
patent: 2823725 (1958-02-01), Trinca
patent: 2889733 (1959-06-01), Vanderhoof
patent: 3060785 (1962-10-01), Corlett
patent: 3471158 (1969-10-01), Solins
patent: 3519979 (1970-07-01), Bodenstein
patent: 4037515 (1977-07-01), Kesselman
patent: 4231240 (1980-11-01), Fujita
patent: 4580935 (1986-04-01), Treihaft
patent: 4693655 (1987-09-01), Omori
patent: 4742702 (1988-05-01), Swertz

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