Diamond-coated button insert for drilling
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United States of America Patent
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Sep 14, 1999
Grant Date -
N/A
app pub date -
Aug 18, 1997
filing date -
Aug 18, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A button insert for a percussive drill bit comprises a carbide base and a diamond layer bonded thereto. The diamond layer forms a dome-shaped cutting surface which is of symmetrical configuration about a center axis of the insert. A crest portion of the cutting surface has a larger radius of curvature than a peripheral portion thereof. The cutting surface can be formed by numerous radii, or can be of constantly varying radius (i.e., elliptical).
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