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
1981-10-05
1985-12-10
Dorner, Kenneth J.
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...
411180, 411103, 411113, 411 38, 29522A, F16B 1908
Patent
active
045576513
ABSTRACT:
A sheet metal clinch nut receives an extruded portion of the workpiece in an aperture in the nut. Part of the extruded portion is swaged radially outwardly of the aperture and locks or clinches the nut onto the workpiece. A screw threads into the nut below the extruded portion of the workpiece. In some forms of the invention the nut is tubular. In other forms the nut comprises a pair of generally parallel arms. The extruded portion of the workpiece extends through an aperture in the first arm and rotation preventing teeth or serrations lock the nut against rotational movement. A self-tapping fastener is inserted creating threads in the workpiece extrusion and then in a second arm of the clinch nut. Tightening of the fastener causes the second arm to deflect toward the first locking the fastener against rotrograde movement. Also disclosed is a simple tool for advancing an interconnected strip of clinch nuts, severing the leading nut and staking the workpiece to it.
REFERENCES:
patent: 2298568 (1942-10-01), Kost
patent: 2397216 (1946-03-01), Stellin
patent: 2409702 (1946-10-01), Luce
patent: 2445978 (1948-07-01), Stellin
patent: 3282317 (1966-11-01), Zahodiakin
patent: 3304830 (1967-02-01), Shackelford
patent: 3824675 (1974-07-01), Ballantyne
patent: 3985172 (1976-10-01), Ballantyne
patent: 3987830 (1976-10-01), Ladouceur
patent: 4202750 (1980-05-01), Khoury
Buckman Thomas W.
Dorner Kenneth J.
Illinois Tool Works Inc.
Roche David I.
Wilson Neill
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