Bore cutter
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United States of America Patent
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Mar 23, 2010
Issued Date -
N/A
app pub date -
Jun 14, 2006
filing date -
Mar 7, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
First and second bore blade portions are provided on the outer periphery of a rotary shaft at intervals in the circumferential direction with a rotation axis as the center. A first bore blade portion has a continuous blade and a second bore blade portion has a discontinuous blade having protruding blade edges and indented blade edges, which are alternately provided. The distance in the radial direction of the protruding blade edges is set so as to be greater than or equal to the distance in the radial direction of a continuous blade, and the distance in the radial direction of indented blade edges is set so as to be smaller than the distance in the radial direction of the continuous blade. Accordingly, the cutting resistance of the bore cutter can be reduced.
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