Screw with multiple cutting ridges in end section
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United States of America Patent
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N/A
Issued Date -
Mar 22, 2007
app pub date -
Sep 20, 2005
filing date -
Sep 20, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A screw includes a head and a shank which includes a thread defined in an outer periphery thereof and a tapered end section connected to a distal end of the shank. Two grooves are defined in the end section to form two cutting units and each cutting unit has a cutting edge and an extension portion. A cutting ridge extends from each of the two cutting units and an outer periphery of each of the cutting ridges intersects a circle whose diameter is composed of the cutting edges of the two cutting cutis. The cutting edges and cutting ridges share the torque so that the user use less force to screw the screw into an object and make the cutting ridges effectively cut the fibers of the object.
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