Drill screw

Details Drill screw Drill screw

1977-03-16

1979-04-03

Britts, Ramon S.

10 10R, 76101B, 72476, F16B 2500

Patent

active

041470885

ABSTRACT:
A drill screw comprising a threaded fastener with a drill bit formed on its entering end, the drill bit characterized by a bi-arc cross-section, that is the shape which is shared by two partially overlapping circles. Also disclosed are novel pinch point dies for making the drill bits and novel hobs for making the pinch point dies.

REFERENCES:
patent: 3288015 (1966-11-01), Hanneman
patent: 3395603 (1968-08-01), Skierski
patent: 3463045 (1969-08-01), Prescott
patent: 3517581 (1970-06-01), Stokes et al.
patent: 3682038 (1972-08-01), Lejdegard
patent: 4016795 (1977-04-01), Gill

Affiliated with

Also associated with

Rating

Drill screw does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drill screw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill screw will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1742261