Cutting tip and cutting bit having increased strength and penetration capability
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United States of America Patent
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Aug 30, 2016
Grant Date -
May 1, 2014
app pub date -
Jun 21, 2012
filing date -
Jun 28, 2011
priority date (Note) -
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Abstract
A profile of a cutting tip includes a convex portion extending from a cutting end to an inflection point located at an axial and radial distance from the cutting end. A concave portion extends from the inflection point to a point at a greater radial and axial distance from the cutting end. The profiles of the generally concave portion and the generally convex portion have a first linear portion defined by a portion of a first line extending from a first point at a first radial position to a second point at a second radial position and axially spaced from the first point. A second linear portion is defined by a portion of a second line extending from a third point to a fourth point at the second radial position and at an axial distance from the second point corresponding to about half a length of the first line.
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