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
1986-02-12
1987-11-10
Wilson, Neill
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...
411399, 411413, F16B 39282, F16B 3504
Patent
active
047054417
ABSTRACT:
A fastener for attaching sheet metal or articles to sheet metal. The fastener is a self-locking sheet metal screw having a plurality of equally spaced teeth formed within a recess beneath the fastener head during the heading operation. The teeth preferably have curved trailing edges and straight or slightly inclined leading edges, and each extends laterally a different distance from the shank, as well as vertically a different distance along the shank, such lateral and vertical distances on a single tooth being equal.
REFERENCES:
patent: 2112494 (1938-03-01), Olson
patent: 2391308 (1945-12-01), Hanneman
patent: 3682507 (1972-08-01), Waud
patent: 4516893 (1985-05-01), Barth
patent: 4518294 (1985-05-01), Barth
Arnold Technologies, Inc.
Dougherty Ralph H.
Wilson Neill
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