Fastening screw and method of forming same
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United States of America Patent
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-
Jan 23, 2001
Grant Date -
N/A
app pub date -
Nov 19, 1998
filing date -
Nov 20, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A fastening screw having an elongate shank (1), and a drilling tip (2) and a head (3) provided at respective opposite ends of the shank (1). The drilling tip (2) has a cutting edge (5) for cutting through metal and a flute (6) extending longitudinally of the shank (1). A thread (8) is formed on the shank (1) and extends over a portion of the section of the shank (1) in which the flute (6) is formed. A method of forming a fastening screw from a screw preform (9), includes deforming the preform (9) to create a drilling tip (2) which has at least one cutting edge (5) and a flute (6), and applying a thread (8) to the shank (1) in the region in which the flute (6) is formed.
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