Lobular fastener with rectilinear pitch profile

Details Lobular fastener with rectilinear pitch profile Lobular fastener with rectilinear pitch profile

1998-08-19

1999-07-13

Wilson, Neill

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Externally threaded fastener element, e.g., bolt, screw, etc.

Thread or shank structure

411386, 411416, 411426, F16B 2500, F16B 3504

Patent

active

059217359

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.

REFERENCES:
patent: 3180126 (1965-04-01), Carlson
patent: 3246556 (1966-04-01), Phipard, Jr.
patent: 4040328 (1977-08-01), Muenchinger

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