Radius gimlet point anti-stripout screw

Details Radius gimlet point anti-stripout screw Radius gimlet point anti-stripout screw

2008-07-22

2008-07-22

Tolan, Edward (Department: 3725)

Threaded, headed fastener, or washer making: process and apparat

Process

Making externally threaded fastener, e.g., screw or bolt

C470S008000

Reexamination Certificate

active

07402109

ABSTRACT:
A self-tapping screw includes a head, a shaft, a tapered end and a rounded distal tip. A thread includes a thread start on the tapered end. The axial position of the thread start and a first full thread, the radius of the round distal tip and the diameter of the tapered end at the thread start are controlled in relation to the screw size for consistent, improved screw performance.

REFERENCES:
patent: 3176491 (1965-04-01), Mau et al.
patent: 3789643 (1974-02-01), Dickson
patent: 4301563 (1981-11-01), Deveney, Jr.
patent: 6508820 (2003-01-01), Bales
patent: 6712708 (2004-03-01), Boyer et al.
patent: 7040850 (2006-05-01), Gaudron

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