Hole cutter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 19, 2014
Grant Date -
Apr 12, 2012
app pub date -
Nov 17, 2010
filing date -
Oct 8, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A hole includes a blade cylinder and at least one first blade portion and at least one second blade portion, which are arranged along the rotation direction at intervals. Each of the first and second blade portions includes an inside blade and an outside blade. In the first and second blade portions that are adjacent to each other along the rotation direction, the sum of the number of cutting edges of the outside blade and the cutting edge of the inside blade of the first blade is three or more, the sum of cutting edges of the outside blade and the cutting edge of the inside blade of the second blade is two or more, the number of the cutting edge of the first blade being different from the number of the cutting edges of the second blade.
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