Cutting Insert
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United States of America Patent
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app pub date -
Dec 21, 2011
filing date -
Jun 24, 2009
priority date (Note) -
Abandoned
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Abstract
A cutting insert has at least one cutting edge, a rake face extending from the cutting edge, a flank intersecting with the rake face by having the cutting edge therebetween, a concave portion recessed downward of the rake face at the backward of the rake face as viewed from the cutting edge, and at least one projection projecting upward from a bottom face of the concave portion, wherein an entirety of the projection is positioned under an extension surface of the rake face, and at least a part of a top face of the projection is away from an extension surface of the rake face as it goes away from the cutting edge.
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