Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...
Patent
1992-05-12
1993-02-02
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Nut, and means to engage substructure on its opposite faces...
411161, 411959, F16B 39282, F16B 3926
Patent
active
051833590
ABSTRACT:
A torque-absorbing rotary threaded fastener for joining metal panels has a stripping torque sufficiently in excess of its driving torque to ensure that it will be relatively unlikely to be stripped when mechanically driven home. The fastener has a clamping face which includes a number of polyhedral nibs extending axially therefrom and separated from one another by substantially planar uninterrupted portions of the clamping face. The nibs include a leading wall and a trailing wall, facing in the direction of tightening and opposite thereto, respectively. The leading wall may be inclined at a steeper angle with respect to the plane of the clamping face than is the trailing wall, or vice versa. The leading wall and the trailing wall meet to form an apex which is also inclined with respect to the plane of the clamping face, so that the nibs increase in axial height as one views outward toward the periphery of the clamping face.
REFERENCES:
patent: 2147209 (1939-02-01), Olson
patent: 2147211 (1939-02-01), Olson
patent: 2959204 (1960-11-01), Rigot
patent: 3208328 (1965-09-01), Myers
patent: 3370631 (1968-02-01), James
patent: 3661046 (1972-05-01), Waud et al.
patent: 4220188 (1980-09-01), McMurray
Illinois Tool Works Inc.
Wilson Neill R.
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