Low torque wood screw

Details Low torque wood screw Low torque wood screw

1994-09-07

1996-05-14

Meyers, Steven N.

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

411399, F16B 2500, F16B 2300

Patent

active

055162487

ABSTRACT:
A low torque fastener screw for securing a wooden workpiece to a substrate includes an elongated body defining a longitudinal axis and having an enlarged head formed on one end, an external pointed thread formed on an opposite end, an elongated unthreaded shank between the enlarged head and the threaded end, and a reamer formed at the juncture of the shank and thread. The reamer has a plurality of longitudinal cutting edges formed about its periphery which ream out the hole formed by the threaded end to a diameter larger than the shank, thereby reducing frictional resistance to rotation of the screw and optimizing the torque applied by the driving tool.

REFERENCES:
patent: 430236 (1890-06-01), Rogers
patent: 1966835 (1934-07-01), Stites
patent: 2895368 (1959-07-01), Place
patent: 4439077 (1984-03-01), Godsted

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