Self-tapping screw for use in plastics

Details Self-tapping screw for use in plastics Self-tapping screw for use in plastics

1980-07-21

1982-06-15

Britts, Ramon S.

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

Having structure to restrict rotation of threaded, mating...

Comprising a thread lock

F16B 3930

Patent

active

043348149

ABSTRACT:
A threaded fastener particularly suited for use with plastics having spaced apart threads and a negative rake or "hook" formed at the crest of certain of the threads so that axial force applied by the fastener in the direction of the head is translated in part towards the axis of the fastener, thus increasing the failure load of the screw assembly and eliminating premature stripping of the screw threads. Also disclosed is the preferred manner of making the threaded fastener of the present invention.

REFERENCES:
patent: 1075310 (1913-10-01), Ulrich
patent: 1250748 (1917-12-01), Woodward
patent: 2437638 (1948-03-01), Evans
patent: 2679774 (1954-06-01), MacDonald
patent: 3076208 (1963-02-01), Moore
patent: 3286579 (1966-11-01), Lovisek
patent: 4144795 (1979-03-01), Gutshall

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