Lobular fastener with rectilinear pitch profile
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United States of America Patent
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-
Jul 13, 1999
Grant Date -
N/A
app pub date -
Aug 19, 1998
filing date -
Aug 19, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fastener is constructed having four thread zones constructed over the length of the fastener, from the head to the tip, namely a ridged cylindrical holding zone, a ridged cylindrical transition thread forming zone, a rectilobular tapered thread forming zone, and a rectilobular alignment zone. The pitch cross section of the thread varies in each zone.
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