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7815735 |
The invention refers to a method and apparatus for CVD coating and to a coated body. To improve the mechanical properties of the structure and surface of the body and to make the method and apparatus as simple and cost-effective as possi...
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7108598 |
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 str...
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7104160 |
A method for producing a cutting tool such a twist grill, end mill, or the like. The method provides an unbonded assembly including a cylindrical core having ends and an elongate side surface covered partially or completely by a coherent...
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6986297 |
A cutting element for a drill bit used in drilling subterranean formations is formed with an internal chamber or passage for the flow of drilling fluid therethrough. The cutting element includes a substrate having at least one internal p...
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6655234 |
The cutting element including a cutting element for a drill bit used in drilling subterranean formations is formed with an internal chamber or passage for the flow of drilling fluid therethrough. A substrate having at least one internal ...
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6408959 |
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 ...
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6289593 |
Improved razors and razor blades and processes for producing razor blades or similar cutting tools with sharp and durable cutting edges, by hard-carbon coating of blades with amorphous diamond, preferably using a filtered cathodic arc pl...
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6234261 |
A method is disclosed comprising the steps of locating, on a surface of a downhole component, a plurality of thermally stable polycrystalline diamond (TSP) bearing elements, and then applying to the surface a settable facing material whi...
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6193001 |
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...
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6189634 |
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 arou...
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6182533 |
A method of making a drill blank which is elongate and which has a vein of a bonding material located in an end surface thereof. A recess is formed in a surface of a cemented carbide body. Either a layer of ultra-hard abrasive or a mass ...
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6176888 |
A composite cutting tool for use in the abrasive processing of hard substrates comprising cutting elements wherein diamond particles in a predominantly metallic binder material are agglomerated and sintered during an individual molding p...
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6055886 |
A drill blank, particularly a blank for a micro-drill, comprises an elongate cylindrical cemented carbide body, having flat end surfaces, a recess formed in one end surface and taking the form of an island in that surface wholly surround...
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6029544 |
A drill bit for cutting hard and abrasive materials has cutting lips formed from sintered polycrystalline diamond (PCD) or polycrystalline cubic boron nitride (PCBN) contained in one or more inserts installed in a drill bit blank. The in...
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5976205 |
The present invention provides a metal bonded abrasive tool wherein the tool has improved life and mechanical properties. The invention further includes the bond composition which allows for improved life and mechanical properties, parti...
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5940975 |
Improved razors and razor blades and processes for producing razor blades or similar cutting tools with sharp and durable cutting edges, by hard-carbon coating of blades with amorphous diamond, preferably using a filtered cathodic arc pl...
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5932508 |
A method of manufacturing a metal bonded abrasive product such as a saw or drill segment or bead for a diamond wire is provided. The method includes the steps of providing a mixture of the metal, in particulate form, and the abrasive par...
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5868885 |
A method for manufacturing cutting tools having diamond-like cutting edges or surfaces which are formed by bonding high shear compaction diamond or cubic boron nitride (CBN) ropes or strips in helical grooves formed on the cutting tool o...
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5737980 |
Thin walled metal alloy receptacles are filled with a filler material. If granular, the filler material is solidified in the receptacles. The receptacles are inserted in a bit mold with their open ends abutting against preformed cutter l...
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5676593 |
A cutter for soft materials is described. The cutter is made from a conventional cutting instrument such as a dental drill bit having hard particles embedded in the tip surface. The cutter is ground at the tip end so as to remove particl...
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5624068 |
The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- ...
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5611251 |
A drill bit for cutting hard and abrasive materials has cutting lips formed from sintered polycrystalline diamond (PCD) or polycrystalline cubic boron nitride (PCBN) contained in one or more inserts installed in a drill bit blank. The in...
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5598750 |
A preform element, such as a cutting element for a drag-type drill bit, includes a facing table of superhard material having a front cutting face, a peripheral surface, and a rear surface bonded to a substrate which is less hard than the...
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5584045 |
Polycrystalline diamond has non-uniform impurity concentration along the direction of thickness. The diamond near the rake surface has a lower impurity concentration. The diamond near the fixation surface has a higher impurity concentrat...
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H001566 |
A drag bit mold fabricated from high temperature resisting material is machined to accept cylindrically shaped polycrystalline diamond cutters (PCD) having tungsten carbide bodies. Each of the multiple PCD matrix pockets in the mold is f...
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5524719 |
An insert for a drill bit is set forth. The insert is formed with an elongate body, typically having a cylindrical cross section terminating at an exposed outer end. The outer end is covered with a polycrystalline disc. In the present di...
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5425288 |
A method of manufacturing a rotary drill bit includes the steps of forming the bit body with a plurality of sockets, inserting in each socket a projecting carbon former, applying a fusible hard facing material to the surface of the bit b...
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5388484 |
A method of manufacturing drilling crowns for cylindrical diamond drilling tool bits affords a waste-free fabrication of the drilling crowns impregnated with diamond particles. In a first step an annular axially extending middle or inter...
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5355750 |
An improved earth-boring bit the rolling cone variety and an insert for use therein is provided. A superabrasive element is coated with at least one layer of metallic material. The superabrasive element then is placed in a receptacle cav...
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5299471 |
A cutting insert for a rotary cutting tool comprises a body of tungsten carbide, with layers of polycrystalline diamond on opposite sides of the body. The diamond layers overlap across the centre-line of the insert. The cutting insert is...
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5297456 |
The invention relates to a cutting tool having twisted edge in a blade part, having a sintered compact with higher hardness and higher wear resistance than a base sintered body buried and affixed along the twisted edge, and its manufactu...
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5291807 |
A drill bit including at least one rolling cutter body with rows of relatively hard substantially outwardly projecting and circumferentially spaced cutting inserts projecting from the cutter body and having effective erosion reducing fea...
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5287774 |
The precise cutting of thin wafers from blocks or rods of hard and brittle material by means of ribbon or wire saws requires a very high strength of the sawing ribbon material or sawing wire material. In the method according to the inven...
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5272940 |
A rotary cutting tool has a plurality of helical channels located in the body of the rotary cutting tool. Individual cutter segments are bonded within each helical channel to form a continuous helical cutting edge that is machined to a f...
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5259280 |
A invention relates to tool having working surfaces (5) which transmit torque by application against a workpiece and are provided with particles of friction material (8) consisting of metallic or mineral material, such as quartz and/or d...
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5247923 |
A method of forming a substantially hemispherically shaped diamond cutting element for use in a rotary drill bit is provided. A natural diamond is obtained and then cleaved to form a planar surface. A portion of the diamond is trimmed in...
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5225275 |
Disclosed is a method for the production of diamond films, which comprises introducing a diamond-forming gas into a reaction chamber in which a substrate is located, activating the gas in the reaction chamber and depositing diamond on th...
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5205684 |
An enlarged diamond table for use as a cutter in rotating drill bits is provided by disposing a plurality of thermally stable or leached polycrystalline diamond (PCD) rod-like elements within a matrix body. In one embodiment the matrix b...
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5199832 |
A diamond cutting table having the geometric characteristics of larger unleached diamond compact products and yet characterized by the physical properties of smaller leached diamond products is fabricated by forming a diamond cutter inco...
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5195403 |
A method of producing a composite cutting insert for a twist drill includes the steps of cutting an intermediate blank from a composite diamond compact. The intermediate blank comprises a relatively broad tungsten carbide strip with a re...
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5159857 |
In an improved single piece earth boring bit of the type having a body including a solid bit face on one end and a shank on the opposite end for connection in a drill string, an improved cutting structure having diamond filled compacts u...
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5133332 |
A diamond tool, e.g., cutting tool, dresser, wire drawing die, etc., having excellent wear resistance, heat resistance and oxidation resistance and with an improved tool life is provided, which is mainly composed of a synthetic diamond s...
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5120327 |
A composite for cutting in subterranean formations comprises a cemented carbide substrate and a diamond layer adhered to a surface of the substrate. That surface includes a plurality of spaced apart ridges forming grooves therebetween. T...
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5119714 |
In an improved earth boring bit of the type having one or more rotable cones secured to bearing shafts, an improved cutting structure having diamond filled compacts used as a wear resistant inserts. The improved compacts have hard metal ...
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5115697 |
A diamond cutting tool is disclosed that forms at least a pair of grooves in the shank of the tool. The grooves contain sintered diamond prior to formation of concave flutes next to the grooves. The grooves are angled to form positive or...
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5101692 |
A two-part investment casting process is described which involves first casting a hard material shell (32) such as stellite, which is threaded or profiled internally to allow attachment to a pre-machined shank (44) such that the advantag...
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5101691 |
A method of manufacturing a cutter assembly for a rotary drill bit includes the step of bonding to a carrier a cutting element which comprises a thin hard facing layer already bonded to a less hard backing layer, the backing layer having...
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5078551 |
A diamond tool 1 comprising a tool tip 5 of boron-containing single-crystal diamond.
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5070748 |
An end mill forms at least a pair of spiral grooves or flutes in the mill side walls. Each groove includes polycrystalline diamond formed along a leading edge of each flute. A process for forming the diamond edged on the PCD material bon...
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5058562 |
A rotary diamond tool for truing a grinding wheel, comprising one or two circular vapor-deposited base plates each having a thin diamond layer formed by a vapor deposition process such as electron assisted chemical vapor deposition or di...
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