Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Pilot end having means enhancing fastening or installation
Patent
1997-07-02
1999-10-12
Green, Brian K.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Pilot end having means enhancing fastening or installation
411404, 411416, F16B 2500
Patent
active
059645601
ABSTRACT:
A threaded fastener for securing a first material to a support member is provided comprising a tapping or tap screw point at a first end, a threaded shank with three separate leads, a first portion of the shank, adjacent to the tap screw point, being of a trilobular thread design, a second portion of the shank, distal from the tap screw point, being unthreaded, and a head at an end opposite the tap screw point having an enlarged diameter and a countersunk shape to reduce the likelihood of pull through of the fastener through said first material, yet to allow the head to be introduced flush with a surface of the first material.
REFERENCES:
patent: 4069730 (1978-01-01), Gutshall
patent: 4269246 (1981-05-01), Larson et al.
patent: 4315340 (1982-02-01), Veldman
patent: 5242253 (1993-09-01), Fulmer
patent: 5244327 (1993-09-01), Whitesell
patent: 5435680 (1995-07-01), Schuster
patent: 5461952 (1995-10-01), Goss
patent: 5641258 (1997-06-01), Solo
Continental/Midland, "Step Taper CA Point Screws", 1984 (411/404).
Continental/Midland, "Torx Systems", 1984 (411/404).
Green Brian K.
Santos Robert G.
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