Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8083012 | Diamond bonded construction with thermally stable region Diamond bonded constructions comprise a polycrystalline diamond body having a matrix phase of bonded-together diamond grains and a plurality of interstitial regions between the diamond grains including a catalyst material used to form the diamond body disposed withi... | 12/27/2011 |
| 8079428 | Hardfacing materials including PCD particles, welding rods and earth-boring tools including such materials, and methods of forming and using same Hardfacing materials include particles of polycrystalline diamond (PCD) material embedded within a matrix material. The PCD particles comprise a plurality of inter-bonded diamond grains. Material compositions and structures used to apply a hardfacing material to an ... | 12/20/2011 |
| 8074748 | Thermally-stable polycrystalline diamond element and compact, and applications therefor such as drill bits Embodiments of the invention relate to thermally-stable polycrystalline diamond (“PCD”) elements, polycrystalline diamond compacts (“PDCs”), and methods of fabricating such PCD elements and PDCs. In an embodiment, a PCD element includes a PCD body comprising... | 12/13/2011 |
| 8069935 | Superabrasive element, and superabrasive compact and drill bit including same According to various aspects of the present invention, a superabrasive element includes a plurality of superabrasive grains (e.g., as diamond grains and/or cubic boron nitride grains). The superabrasive element further includes a binder constituent that bonds at lea... | 12/06/2011 |
| 8056650 | Thermally stable ultra-hard material compact construction Thermally stable ultra-hard compact constructions of this invention comprise an ultra-hard material body that includes a thermally stable region positioned adjacent a surface of the body. The thermally stable region is formed from consolidated materials that are the... | 11/15/2011 |
| 8028771 | Polycrystalline diamond constructions having improved thermal stability Polycrystalline diamond constructions include a diamond body comprising a matrix phase of bonded together diamond crystals formed at high pressure/high temperature conditions with a catalyst material. The sintered body is treated to remove the catalyst material disp... | 10/04/2011 |
| 8025112 | Earth-boring bits and other parts including cemented carbide An article of manufacture includes a cemented carbide piece and a joining phase that binds the cemented carbide piece into the article. The joining phase includes inorganic particles and a matrix material. The matrix material is a metal and a metallic alloy. The mel... | 09/27/2011 |
| 8016056 | Asymmetric graded composites for improved drill bits A cutting tool that includes at least one tungsten carbide cutting element disposed on a support, wherein at least one tungsten carbide cutting element has at least one localized region having a material property different from the remaining region, wherein the at l... | 09/13/2011 |
| 8002053 | System, method, and apparatus for predicting tracking by roller cone bits and anti-tracking cutting element spacing Embodiments of a system, method, and apparatus for predicting and reducing tracking by roller cone bits by adjusting compact spacing are disclosed. Different pitches between adjacent compacts or teeth provide a cone row that is substantially less likely to track. A ... | 08/23/2011 |
| 8002052 | Particle-matrix composite drill bits with hardfacing A rotary drill bit includes a bit body substantially formed of a particle-matrix composite material having an exterior surface and an abrasive wear-resistant material disposed on at least a portion of the exterior surface of the bit body. Methods for applying an abr... | 08/23/2011 |
| 7997358 | Bonding of cutters in diamond drill bits A bit body formed of a mixture of matrix material and superabrasive powder and including pockets lined with superabrasive-free matrix material, and a method for forming the same, are provided. The pockets are shaped to receive cutting elements therein. The superabra... | 08/16/2011 |
| 7980333 | Bar trimmers on disk bit An earth boring drill bit comprising a milled cutter having rows of hardfacing guides on the cutter. Hardfacing is applied between adjacent hardfacing guides to form a hardfacing web that serves as a cutting element. The hardfacing web defines an interface between t... | 07/19/2011 |
| 7913779 | Earth-boring rotary drill bits including bit bodies having boron carbide particles in aluminum or aluminum-based alloy matrix materials, and methods for forming such bits Rotary drill bits for drilling subterranean formations include a bit body and at least one cutting structure disposed on a face thereof. The bit body includes a crown region comprising a particle-matrix composite material that includes a plurality of boron carbide p... | 03/29/2011 |
| 7891443 | Hardfacing around ball loading hole for earth-boring bit A rotary cone earth boring bit has at least one bit leg with a cone retaining ball passage that intersects an outer surface of the bit leg and is closed by a ball plug. An upwardly curved lower hardfacing bead is on the outer surface of the bit leg at least partiall... | 02/22/2011 |
| 7878274 | Steel tooth disk with hardfacing An earth boring drill bit comprising a milled cutter having rows of teeth hardfacing guides on the cutter. Hardfacing is applied between adjacent teeth hardfacing guides to form a cutting element. The hardfacing may extend past the crest of the teeth hardfacing guid... | 02/01/2011 |
| 7874383 | Polycrystalline diamond insert, drill bit including same, and method of operation Polycrystalline diamond inserts are disclosed. For example, a polycrystalline diamond insert may comprise a polycrystalline diamond layer affixed to a substrate at an interface. In addition the polycrystalline diamond layer may comprise: an arcuate exterior surface,... | 01/25/2011 |
| 7866417 | Self sharpening steel tooth cutting structure An earth boring drill bit comprising a milled cutter having rows of teeth hardfacing guides on the cutter. Hardfacing is applied between adjacent teeth hardfacing guides to form a cutting element. The hardfacing may include an annular body with ridges that outwardly... | 01/11/2011 |
| 7861806 | Shank structure for rotary drill bits A shank configuration for rotary drill bits is disclosed for positioning of the shank in relation to a bit body. A tapered surface or feature of the shank may be configured and sized to matingly engage a complementarily shaped surface or feature of the drill bit bod... | 01/04/2011 |
| 7832506 | Cutting elements with increased toughness and thermal fatigue resistance for drilling applications Cutting elements offering increased toughness and thermal fatigue resistance can be formed of a wear resistant material having coarse grains disposed in a binder matrix with a binder content of at least about 18% by weight. The coarse grains include grains of at lea... | 11/16/2010 |
| 7828088 | Thermally stable ultra-hard material compact construction Thermally stable ultra-hard compact constructions of this invention comprise an ultra-hard material body that includes a thermally stable region positioned adjacent a surface of the body. The thermally stable region is formed from consolidated materials that are the... | 11/09/2010 |
| 7823664 | Corrosion protection for head section of earth boring bit An earth boring bit has a steel body having at least one leg with a depending bearing pin. A cone having cutting elements is rotatably mounted to the bearing pin. A ball plug weld is on the outer surface of the leg. A layer of hardfacing applied to part of the outer... | 11/02/2010 |
| 7798255 | Drill bits having optimized cutting element counts for reduced tracking and/or increased drilling performance A roller cone drill bit for drilling earth formation includes rows arranged on each of the cones such that, when viewed in routed profile, cutting element profiles partially overlap other cutting element profiles. The roller cone drill bit having at least a first th... | 09/21/2010 |
| 7784567 | Earth-boring rotary drill bits including bit bodies comprising reinforced titanium or titanium-based alloy matrix materials, and methods for forming such bits Earth-boring rotary drill bits include bit bodies comprising a composite material including a plurality of hard phase regions or particles dispersed throughout a titanium or titanium-based alloy matrix material. The bits further include a cutting structure disposed ... | 08/31/2010 |
| 7779937 | Steel tooth bit with scooped teeth profile An earth-boring bit has at least one steel tooth with a scoop-shaped profile. The scoop-shaped profile is formed by milling and hardfacing a tooth to have at least one flank with a concave profile. Additionally, the tooth may contain one flank with a concave profile... | 08/24/2010 |
| 7770672 | Layered hardfacing, durable hardfacing for drill bits A drill bit having a bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade, at least one cutter disposed in the at least one cutter pocket, hardfacing applied to at least a selected portion of the drill bit is show... | 08/10/2010 |
| 7757788 | Ultrahard composite constructions Ultrahard composite constructions comprise a plurality of first phases dispersed within a matrix second phase, wherein each can comprise an ultrahard material including PCD, PcBN, and mixtures thereof. The constructions are formed from a plurality of granules that a... | 07/20/2010 |
| 7753143 | Superabrasive element, structures utilizing same, and method of fabricating same According to various aspects of the present invention, a superabrasive element includes a plurality of superabrasive grains (e.g., as diamond grains and/or cubic boron nitride grains). The superabrasive element further includes a binder constituent that bonds at lea... | 07/13/2010 |
| 7743855 | Drill bit with cutter element having multifaceted, slanted top cutting surface A drill bit includes a cutter element having a tapered and faceted side surface extending to a peak, and a polygonal wear face that slopes from the peak toward the cutter element base. The cutter element is mounted in a cone cutter of a rolling cone drill bit and, i... | 06/29/2010 |
| 7712553 | Method and apparatus for selectively leaching portions of PDC cutters used in drill bits A polycrystalline diamond compact (PDC) cutter having a body of diamond crystals containing a catalyzing material is coated with a material impervious to a given acid. After the coating has dried, a segment of the coating is removed and acid is supplied to the diamo... | 05/11/2010 |
| 7699126 | Cutting element having asymmetrical crest for roller cone drill bit A drill bit for drilling a borehole includes a cutter element comprising a base portion. In addition, the cutter element comprises a cutting portion extending from the base portion and terminating in an elongate crest extending between a first crest end and a second... | 04/20/2010 |
| 7681669 | Polycrystalline diamond insert, drill bit including same, and method of operation Polycrystalline diamond inserts are disclosed. For example, a polycrystalline diamond insert may comprise a polycrystalline diamond layer affixed to a substrate at an interface. In addition the polycrystalline diamond layer may comprise: an arcuate exterior surface,... | 03/23/2010 |
| 7654346 | Steel tooth drill bit with improved tooth breakage resistance A drill bit having steel teeth is provided with a combination of hardfacing materials on the teeth. The bases of the teeth are hardfaced with nickel-based materials to significantly reduce any potential cracking therein. Portions of the supporting cones adjacent the... | 02/02/2010 |
| 7647992 | Polycrystalline diamond carbide composites Polycrystalline diamond (PCD) carbide composites of this invention have a microstructure comprising a plurality of granules formed from PCD, polycrystalline cubic boron nitride, or mixture thereof, that are distributed within a substantially continuous second matrix... | 01/19/2010 |
| 7624823 | Roller cone drill bits with optimized cutting zones, load zones, stress zones and wear zones for increased drilling life and methods Roller cone drill bits may be formed with cutting elements and cutting structures optimized to increase downhole drilling life of an associated drill bit. The cutting zone, load zone and wear zone of each cutting element may be analyzed by finely meshing each cuttin... | 12/01/2009 |
| 7621347 | Bit leg and cone hardfacing for earth-boring bit An earth-boring bit has a bit body, and a bit leg depending from the bit body with a circumferentially extending outer surface, a leading side and a trailing side. A cone is rotatably mounted on a cantilevered bearing shaft depending inwardly from the bit leg. A fir... | 11/24/2009 |
| 7600589 | Rotary drill bits A shank configuration for rotary drill bits, is disclosed for positioning of the shank in relation to the bit body. A tapered surface or feature of the shank may be configured and sized to matingly engage a complementarily shaped surface or feature of the drill bit ... | 10/13/2009 |
| 7597159 | Drill bits and drilling tools including abrasive wear-resistant materials An abrasive wear-resistant material includes a matrix and sintered and cast tungsten carbide pellets. A device for use in drilling subterranean formations includes a first structure secured to a second structure with a bonding material. An abrasive wear-resistant ma... | 10/06/2009 |
| 7540340 | Cutting element having enhanced cutting geometry A drill bit having a bit body, at least one roller cone attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on the at least one roller cone is disclosed. At least one of the plurality of cutting elem... | 06/02/2009 |
| 7523794 | Wear resistant assembly In one aspect of the invention, a wear resistant assembly has at least one hard insert disposed within a recess formed within a surface. A hard material substantially surrounds the hard insert and is also disposed within the surface. The hard material is separated f... | 04/28/2009 |
| 7506705 | Method of producing downhole drill bits with integral carbide studs A down hole rock drill bit and method of manufacture of the same comprising a cast metal drill bit body having a plurality of hardened carbide studs partially cast in the drill bit body. The drill bit is cast by means of a foam pattern replicating the drill bit, typ... | 03/24/2009 |
