Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Head driving structure
Patent
1995-04-04
1997-06-24
Meyers, Steven N.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Head driving structure
411402, 411403, F16B 2300
Patent
active
056412584
ABSTRACT:
The screw, of the type provided with a coaxial recess adapted to mate with the tip of a screwing tool has in plan view a configuration in the overall form of a star with six chamfered points, with the lateral walls of the recess flared outwards and inclined to the screw axis by an angle of between 7 and 15 degrees. The sides of the chamfered points of the star consist of flat surfaces, pairs of which form on the lateral wall of the recess six corresponding ribs of isosceles triangle cross-section, the angle at the vertex of the isosceles triangle being substantially 90 degrees and the height of the triangle being substantially equal to one half the base length of said isosceles triangle. The screwing tool has a tip which mates with the lateral walls of the screw recess.
REFERENCES:
patent: 2084079 (1937-06-01), Clark
patent: 2285460 (1942-06-01), Purtell
patent: 3295572 (1967-01-01), Wing
patent: 3604305 (1971-09-01), Dreger
patent: 4202244 (1980-05-01), Gutshall
patent: 4384812 (1983-05-01), Miyagawa
Meyers Steven N.
Pham Tuyet-Phuong
LandOfFree
Recessed screw head does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recessed screw head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recessed screw head will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-146474