Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc. – Including lubricating means
Patent
1991-06-18
1993-06-22
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
Including lubricating means
411387, 411903, 411914, 470 2, F16B 2500, F16B 3700, B21D 5320
Patent
active
052211703
ABSTRACT:
This invention relates to threaded fasteners, an apparatus for making such threaded fasteners and methods of fastening parts. The tip of the shank of a threaded fastener has at least one thread coated with a lubricating or masking material to reduce the drive torque necessary for fastening as well as provide a protective coating for the fastener during subsequent processing operations. The drill tip of the disclosed self-drilling fasteners is coated with a lubricating material to reduce drive torque and to eliminate binding when drilling through fibrous material. The present invention also prevents the build-up of corrosion inhibiting materials on threaded fasteners attached to parts to be fastened together. A masking and/or insulating material is first applied to the threaded fasteners attached to the parts to substantially prevent applied corrosion inhibitor from adhering to the threads of the fastener. A method of fastening parts, including fibrous material such as carpet or sound insulation, is also accomplished through practice of the present invention. The apparatus of the present invention provides a resin type stream entrained in a gaseous jet directed through a nozzle onto the threads of a fastener. The apparatus provides selectable thread coverage, including complete coverage of all threads.
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Dorflinger Max F.
Dudley Joseph R.
Duffy Richard J.
Fruehe Gregory A.
Nylok Fastener Corporation
Wilson Neill R.
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