Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2008-01-09
2011-11-22
Neuder, William P (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S434000, C175S435000
Reexamination Certificate
active
08061454
ABSTRACT:
An ultra-hard and metallic construction comprises an ultra-hard component that is attached to a metallic component via a braze joint. The braze joint is interposed between the ultra-hard component and the metallic component, and comprises a first braze material bonded to a surface of the ultra-hard component. The braze joint includes an intervening layer in direct contact with the first braze material, and that is formed from a rigid material. The braze joint further comprises a second braze material that is interposed between the intervening layer and the metallic component, and that is different from the first braze material.
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Belnap J. Daniel
Voronin Georgiy
Neuder William P
Ro Yong-Suk
Smith International Inc.
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