| Patent Number |
Title Of Patent |
Date Issued |
| 7108598 |
PDC interface incorporating a closed network of features |
September 19, 2006 |
| A superhard compact having an improved superabrasive-substrate interface region design for use in drilling bits, cutting tools and wire dies and the like. This compact is designed to provide an interface design to manipulate residual stresses to enhance the working the strength of the |
| 6779951 |
Drill insert using a sandwiched polycrystalline diamond compact and method of making the same |
August 24, 2004 |
| A new drill insert product and the method of making the same are provided. This invention makes use of a multi-metal region bonded to the top (cutting) surface of a superabrasive layer to improve drill life, decrease the propensity for delamination and to avoid crack initiation sites in |
| 6447560 |
Method for forming a superabrasive polycrystalline cutting tool with an integral chipbreaker fea |
September 10, 2002 |
| A method or process for making polycrystalline diamond or polycrystalline CBN cutting tools (Superabrasives), which have integral chip-breaking features is disclosed. This method involves pressing a die or other like rigid component against either the outer can cover or the diamond or CB |
| 6338754 |
Synthetic gasket material |
January 15, 2002 |
| A synthetic gasket material and the method for make such is described. This invention is specifically adapted for use in high-pressure, high-temperature presses. This material is made from a compacted, granulated and dried mixture of talc, garnet, and sodium silicate. This compositio |
| 6258139 |
Polycrystalline diamond cutter with an integral alternative material core |
July 10, 2001 |
| A cutting element, insert or compact, is provided for use with drills used in the drilling and boring of subterranean formations or in machining of metal, composites or woodworking. This new insert besides having a superabrasive layer on the surface of a substrate, also may have one or |
| 6196340 |
Surface geometry for non-planar drill inserts |
March 6, 2001 |
| A cutting element insert is provided for use with drills used in the drilling and boring through of subterranean formations. This new insert has a modified diamond surface shape having ridges, facets and/or other discontinuities on the cutting surface topography, formed on or about an |
| 6189634 |
Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery |
February 20, 2001 |
| A cutting element, insert or compact, is provided for use with drills used in the drilling and boring of subterranean formations. This new insert, in its preferred embodiment, has a "hoop" region of polycrystalline diamond extending around the periphery of the compact to reduce the resid |
| 6068071 |
Cutter with polycrystalline diamond layer and conic section profile |
May 30, 2000 |
| Polycrystalline diamond cutter (PDC) designs which substantially improve the penetration rate of fixed cutter drill bits while simultaneously reducing the wear on the bit during drilling operations are disclosed. The designs are based upon the observation that: 1) the wear pattern of a P |
| 5979579 |
Polycrystalline diamond cutter with enhanced durability |
November 9, 1999 |
| A cutting element is provided for use with drill used in the drilling and boring through subterranean formations. This new cutter has improved wear characteristics while maximizing the manufacturability and cost effectiveness of the cutter. This invention accomplishes these objectives |
| 5944129 |
Surface finish for non-planar inserts |
August 31, 1999 |
| An improved surface finish for non-planar drill inserts or cutting elements is provided for use on inserts used in the drilling and boring of subterranean rock formations. This new surface finish provides an insert with improved wear characteristics, a decrease in heat generation, a |
| 5875862 |
Polycrystalline diamond cutter with integral carbide/diamond transition layer |
March 2, 1999 |
| A composite body cutting instrument formed of a polycrystalline diamond layer sintered to a carbide substrate with a carbide/diamond transition layer. The transition layer is made by creating carbide projections perpendicular to the plane of the carbide substrate face in a random or |
| 5601477 |
Polycrystalline abrasive compact with honed edge |
February 11, 1997 |
| A compact cutter for drilling or cutting material, such as rock, is formed from a substrate of tungsten carbide, or other hard substance, bonded to a polycrystalline layer which includes an upper, generally planar cutting surface. The corner formed by the cutting surface and the sides of |
| 5355969 |
Composite polycrystalline cutting element with improved fracture and delamination resistance |
October 18, 1994 |
| A cutting implement formed from a substrate of carbide, or other hard substance, bonded to a polycrystalline layer which serves as the cutting portion of the implement. The interface between the substrate and polycrystalline layer is defined by surface topography with radially spaced |
| 5186892 |
Method of healing cracks and flaws in a previously sintered cemented carbide tools |
February 16, 1993 |
| This patent covers the concept of putting a previously sintered carbide tool or part back through the sintering process. This resintering, heals stress related microcracks which, when allowed to progress, could ultimately be a cause of the failure for the object. This produces a long |
| 5127923 |
Composite abrasive compact having high thermal stability |
July 7, 1992 |
| An abrasive compact with a substantially solid body is provided from a mass of abrasive particles which are bonded together on a particle-to-particle basis. A network of interstices is formed within the body by removing the metallic second phase by-product of a solvent catalyst sintering |
