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
1988-06-29
1990-03-27
Lindsey, Rodney M.
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...
411103, F16B 3704
Patent
active
049115910
ABSTRACT:
An improved fastener and method of attachment to sheet material providing attachment of a tubular fastener to sheet material by extruding, without severing, portions of the sheet material completely through openings on the base portion of the fastener. The extruded material is clinched on the top surface of the base portion by clinch members integrally formed with the base portion. The fastener is internally threaded, lightweight and preferably heat-treated prior to attachment to the sheet material to provide fastener strength equivalent to or greater than that of much heavier nuts. Two types of such fasteners may be attached by a method which opens up a hole in the sheet material of a larger diameter than the major diameter of the threads in the fasteners while simultaneously clinching the fastener in place. This eliminates the need to use thread-cutting bolts. The fasteners may be connected together to form a strip to be fed into an automated assembly unit from a dispenser.
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Lindsey Rodney M.
Van Ophem Remy J.
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