Stone working – Splitting – shearing – and punching
Patent
1989-08-30
1991-02-05
Schmidt, Frederick R.
Stone working
Splitting, shearing, and punching
125390, 51283R, 175410, B28D 132, B28D 504, E21B 1000
Patent
active
049895788
ABSTRACT:
A method of forming hemispherically shaped diamond cutting elements for use in a rotary drill bit is provided. The method includes identifying a cleaving plane in a diamond and a perpendicular axis, polishing the diamond to form a series of truncated cones approximating a hemisphere around said axis, and cleaving the diamond to form a cutting face.
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Catalog entitled, "Diamond Drilling", of Diamant Boart Discloses Various Diamond Drill Bits Offered by Diamant Boart.
Catalog Entitled, "J-K-S Diamond Bits", Discloses Various Diamonds that are Used in Drill Bits.
Schmidt Frederick R.
Watson Bruce P.
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