Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2005-05-17
2005-05-17
Singh, Sunil (Department: 3673)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S426000, C175S434000
Reexamination Certificate
active
06892836
ABSTRACT:
A non-uniform interface is formed between a polycrystalline ultra hard material layer and a cemented tungsten carbide substrate, or a polycrystalline ultra hard material layer and a transition layer, or a transition layer and a substrate of a cutting element. A first sheet made from an intermediate material is formed and embossed on one face forming a non-uniform pattern raised in relief on the face. The embossed sheet is placed on a face of a presintered substrate. An ultra hard material sheet is formed and embossed, forming a non-uniform face complementary to the non-uniform face on the sheet of intermediate material. The ultra hard material sheet is placed over the intermediate material sheet so that the complementary faces are adjacent to each other. The assembly of substrate and sheets is sintered in a HPHT process. The sintering process causes the first sheet to become integral with the substrate and results in a substrate having a non-uniform cutting face onto which is bonded a polycrystalline ultra hard material layer. Embossed transition material sheets may be employed between the ultra hard material sheet and the first sheet to form transition layers with uniform or non-uniform interfaces.
REFERENCES:
patent: 4604106 (1986-08-01), Hall et al.
patent: 4610320 (1986-09-01), Beakley
patent: 4629373 (1986-12-01), Hall
patent: 4764434 (1988-08-01), Aronsson et al.
patent: 4954139 (1990-09-01), Cerutti
patent: 5011515 (1991-04-01), Frushour
patent: 5037451 (1991-08-01), Burnand et al.
patent: 5135061 (1992-08-01), Newton, Jr.
patent: 5335738 (1994-08-01), Waldenstrom et al.
patent: 5469927 (1995-11-01), Griffin
patent: 5524719 (1996-06-01), Dennis
patent: 5598750 (1997-02-01), Griffin et al.
patent: 5647449 (1997-07-01), Dennis
patent: 5662720 (1997-09-01), O'Tighearnaigh
patent: 5669271 (1997-09-01), Griffin et al.
patent: 6199645 (2001-03-01), Anderson et al.
patent: 2282833 (1995-04-01), None
patent: 2331538 (1999-05-01), None
Eyre Ronald K.
Keshavan Madapusi K.
Christie Parker & Hale LLP
Singh Sunil
Smith International Inc.
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