Self-locking preload controlling nut

Details Self-locking preload controlling nut Self-locking preload controlling nut

1996-01-25

1997-12-02

Wilson, Neill R.

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

Torque responsive nut or bolt driving connection

Frangible connection

411361, 4119372, F16B 3100, F16B 1900

Patent

active

056928637

ABSTRACT:
A self-locking internally threaded nut has a deltoid shaped locking section having circumferentially spaced protrusions. The protrusions form a surface adapted to be engaged by a deltoid driver which tightens the nut onto a bolt to a predetermined axial load. At the predetermined load the protrusions are plastically deformed inwardly on the nut so that the driver rotates freely on the nut. When the protrusions are inwardly deformed, the deformed material impinges on the bolt, thereby rotationally locking the nut on the bolt.

REFERENCES:
patent: 4260005 (1981-04-01), Stencel
patent: 4383353 (1983-05-01), Stencel
patent: 4544312 (1985-10-01), Stencel
patent: 4682520 (1987-07-01), Gray
patent: 5061132 (1991-10-01), Cosenza
patent: 5092726 (1992-03-01), Wheeler et al.
patent: 5148727 (1992-09-01), Williamson
patent: 5452974 (1995-09-01), Binns

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