Drill bit
AssigneeChristensen, Inc.
InventorsCornelius Phaal, Rainer Jurgens
Life of this patent
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Abstract
A rotary boring bit for boreholes comprises a body provided on its outer periphery with cutting members (6) consisting of a cutting portion (8) and a supporting portion (7), each cutting member being formed as a segment of a sintered body (1) having a core (3) of cutting material encased by a shell (2).
Claims12
A rotary boring bit for boreholes, comprising a body which is provided on its outer periphery with cutting members each of which consist of a supporting portion and a cutting portion disposed on the supporting portion, each cutting member being formed as a wedge shaped cut-out segment of a sintered body with a supporting portion surrounding the cutting portion as a casing at least at the periphery, said cutting portion being a material selected from compacted diamond and compacted cubic boron nitride.
Dependencies are inferred from the claim text.