Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2008-04-08
2008-04-08
Gay, Jennifer H. (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S434000, C175S435000, C299S111000
Reexamination Certificate
active
07353893
ABSTRACT:
In one aspect of the invention, a tool has a wear-resistant base suitable for attachment to a driving mechanism and also a hard tip attached to an interfacial surface of the base. The tip has a first cemented metal carbide segment bonded to a superhard material at a non-planar interface. The tip has a height between 4 and 10 mm and also has a curved working surface opposite the interfacial surface. A volume of the superhard material is about 75% to 150% of a volume of the first cemented metal carbide segment.
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Crockett Ronald
Hall David R.
Jepson Jeff
Gay Jennifer H.
Harcourt Brad
Wilde Tyson J.
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