Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Pilot end having means enhancing fastening or installation
Patent
1998-11-13
2000-05-16
Wilson, Neill
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Pilot end having means enhancing fastening or installation
4113874, 411426, F16B 2500, F16B 3504
Patent
active
060627867
ABSTRACT:
A lead-in point on an end of an externally threaded fastener has a shape in any axial section defined by a curve tangent to the inside of a cylinder formed about the thread axis. The cylinder is of a diameter smaller than the smallest permissible minor (inner) diameter of a mating internal thread, but preferably larger than the minor diameter of the external thread. The length of the lead-in point is preferably from one to three thread pitches. The curved surface of the lead-in point is such that at any practical angle of insertion (where thread engagement is possible), the dimensional characteristics of the lead-in point present only a curved surface (not an edge) for possible contact with the internal threads. This length also insures that the end of the fastener is small enough to feed into internal threads at all angles where such thread contact is effective in producing a threaded joint.
REFERENCES:
patent: 3094894 (1963-06-01), Broberg
patent: 5073073 (1991-12-01), Kazino et al.
patent: 5209622 (1993-05-01), Kazino et al.
patent: 5730566 (1998-03-01), Goodwin et al.
patent: 5791849 (1998-08-01), Goodwin et al.
Garver Michael A.
Goodwin Jerry J.
Snoddy Anthony L.
Beard, Jr. R. William
Wilson Neill
LandOfFree
Anti-cross treading fastener lead-in point does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Anti-cross treading fastener lead-in point, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-cross treading fastener lead-in point will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-253387