Saw tooth screw
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jan 4, 2011
Issued Date -
N/A
app pub date -
Aug 26, 2006
filing date -
Aug 26, 2006
priority date (Note) -
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Abstract
A saw tooth screw provides a screw thread divided into a first and a second thread sections. A plurality of slots, inclined with respect to a shank axial line, are disposed on each thread of the first thread section for dividing the thread into a plurality of thread segments, wherein each of the thread segment has a first inclined surface and a second inclined surface on two ends thereof; the first inclined surface is parallel to the second inclined surface. The thread of the second thread section is formed of a saw-tooth-shape by having recesses extending from a shank to an outer edge of the thread for debris of object to exit through the slots, thereby reducing the screwing torsion and increasing the screwing rotation speed.
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