Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Metallic resilient securing means
Patent
1999-04-15
2000-06-27
Wilson, Neill
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Metallic resilient securing means
411 7, 411107, 411396, 411970, 411999, F16B 2118, F16B 2300, F16B 3900
Patent
active
060799234
ABSTRACT:
A captive panel fastener includes a retractable screw having a thermal plastic cap molded around its head. The cap includes slotted skirt with resilient fingers. When the retractable screw is forced downward through the bore of the ferrule having divergent sides, the fingers of the cap spread apart by the wedging action against the outside surface of the ferrule, thus providing a biasing force urging the screw in an upward retracted direction. The ends of the cap fingers include inward facing ribs which fall into a circumferential groove around the outside surface of the ferrule adjacent its bottom end. The groove may further include plurality of radial extending teeth which engage inward facing protrusions located on the fingertip ribs to resist unwanted loosening of the screw.
REFERENCES:
patent: 3167105 (1965-01-01), Rosan
patent: 5020951 (1991-06-01), Smith
patent: 5094579 (1992-03-01), Johnson
patent: 5586852 (1996-12-01), Ganter
Link Craig G.
McDonough William P.
Ross Harold D.
Stotz, Jr. Robert F.
Vogel Peter A.
Gore Gregory J.
Penn Engineering & Manufacturing Corp.
Wilson Neill
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