Screw and screw forming tool

Details Screw and screw forming tool Screw and screw forming tool

1980-03-31

1983-05-24

Holko, Thomas J.

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

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

Head driving structure

10 26, 81121R, 81436, 411403, F16B 2300

Patent

active

043848125

ABSTRACT:
A screw having a star-shaped socket hole in the top surface of the screw head in the form of two equilateral octagons which are disposed between a regular octagon and a regular square inscribed in the regular octagon and which are placed one upon another in concentric and out-of-phase relation with a phase shift of about 45.degree. so that there are eight convex regions which alternate with eight concave regions. A tool for forming the same is also disclosed.

REFERENCES:
patent: 2083092 (1937-06-01), Richer
patent: 2914984 (1959-12-01), Ansingh
patent: 3190169 (1965-06-01), Rosan
patent: 3400626 (1968-09-01), Bergere
patent: 3604305 (1971-09-01), Dreger
patent: 3656397 (1972-04-01), Kudelko

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2144390