Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 8118119 | Impregnated rotary bit A drill bit includes a plurality of continuous segments impregnated with diamond that are each mounted to form a corresponding blade. The regions between the blades define a plurality of fluid passages on the bit face. The blades extend radially outwardly to the gag... | 02/21/2012 |
| 7866418 | Rotary drill bit including polycrystalline diamond cutting elements Embodiments of the invention relate to polycrystalline diamond (“PCD”) exhibiting enhanced diamond-to-diamond bonding. In an embodiment, PCD includes a plurality of diamond grains defining a plurality of interstitial regions. A metal-solvent catalyst occupies at... | 01/11/2011 |
| 7527110 | Percussive drill bit A percussive drill bit has a working face opposite a shank end. The working face has a central jack insert and a plurality of peripheral inserts extending from the working face. The ends of the plurality of the peripheral inserts form an impacting plane. The central... | 05/05/2009 |
| 7287610 | Cutting elements and bits incorporating the same Cutting elements and bits incorporating such cutting elements are provided. The cutting elements include a substrate having an interface surface over which is formed an ultra hard material layer. A plurality of lands are formed on the interface surface. A plurality ... | 10/30/2007 |
| 7234550 | Bits and cutting structures An insert for a drill bit which includes a diamond impregnated body, and a shearing portion disposed on said body is shown. In addition, a method for forming a drill bit that includes (a) forming a shearing portion on a diamond-impregnated insert body to form a cutt... | 06/26/2007 |
| 7235211 | Rotary cone bit with functionally-engineered composite inserts A rotary cone bit, having a functionally-engineered surface of this invention, comprises a bit body having at least one leg extending therefrom, and a cone that is rotatably disposed on the leg. The cone typically comprises a plurality of cutting elements that proje... | 06/26/2007 |
| 7211218 | 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... | 05/01/2007 |
| 7128773 | Compositions having enhanced wear resistance A composite material includes a double cemented carbide and a coarse grain dopant, wherein the coarse grain is added in an amount sufficient to improve wear resistance of virgin double cemented carbide. The double cemented carbide may selected from the group of carb... | 10/31/2006 |
| 7108598 | PDC interface incorporating a closed network of features 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 ... | 09/19/2006 |
| 7104344 | Percussion drilling head Device and method for drilling into geological formations. The device comprises: a rotatable body; drilling cutters arranged on an axial end surface of the rotatable body; a percussion part, which ... | 09/12/2006 |
| 7086489 | Multi-lobed cutter element for drill bit Disclosed are cutter elements for a drill bits having particular, but not exclusive, application on the nose portion of the cone cutters of a rolling cone bit. The cutter elements include a base, a cutting portion, and a plurality of cutting lobes extending radially... | 08/08/2006 |
| 7077867 | Prosthetic knee joint having at least one diamond articulation surface Prosthetic joints, components for prosthetic joints, superhard bearing and articulation surfaces, diamond bearing and articulation surfaces, substrate surface topographical features, materials for making joints, bearing and articulation surfaces, and methods for man... | 07/18/2006 |
| 7048081 | Superabrasive cutting element having an asperital cutting face and drill bit so equipped A superabrasive cutting element for use with a drill bit for drilling subterranean formations and having a superabrasive table, or cutting face, in which a conglomerate of superabrasive particles is dispersed and bonded, or sintered, and in which at least one expose... | 05/23/2006 |
| 6994615 | Cutting tools with two-slope profile An abrasive tool insert is formed from a substrate having an inner face that has a center, and annular face which annular face has a periphery. The inner face slopes outwardly and downwardly from the center at an angle ranging from between about 5° and 30° from th... | 02/07/2006 |
| 6935618 | Valve component with multiple surface layers A sliding component, particularly a disk valve plate. The sliding component includes a multi-layer surface structure comprising a strengthening layer harder than the substrate material, and an amorphous diamond top layer. ... | 08/30/2005 |
| 6932172 | Rotary contact structures and cutting elements Cutter elements including pointed contact structures and elements, and rock tools or bits for carrying those elements, for chipping, cutting, and breaking non-ductile materials are disclosed. The cutter elements, the ends of which directly contact and cut through ro... | 08/23/2005 |
| 6933049 | Abrasive tool inserts with diminished residual tensile stresses and their production An abrasive tool insert includes (a) a substrate having a support face that includes (1) an inner support table, (2) an outer shoulder having a width, Sw, and (3) a downwardly sloping interface from the support table to the shoulder, which interface has a... | 08/23/2005 |
| 6929079 | Drill bit cutter element having multiple cusps Cutter elements for use in rolling cones rock bits are disclosed having a crown that includes multiple, spaced-apart cusps for enhancing formation removal by creating overlapping Hertzian contact zones. The cusps may be partially dome-shaped, berm shaped or otherwis... | 08/16/2005 |
| 6918455 | Drill bit with large inserts A percussion drill bit is provided that has at least two different pluralities of inserts extending from the bit head to better match the conditions seen on the bit head during drilling. The preferred embodiment has a plurality of large inserts with a polycrystallin... | 07/19/2005 |
| 6910838 | Rock drill A rock drill for rotary hammers is proposed in which a conveying helix (3) having main and secondary webs (6 to 9) is used. A one-piece carbide crown, with its wing-shaped main and secondary lips (24 to 27), is butt-welded to the c... | 06/28/2005 |
| 6908688 | Graded composite hardmetals A multiple-region hardmetal tool piece. The tool piece includes a hardmetal body including a hard particle component and a binder; an additional body, the additional body including a hardmetal body having a hard particle component and a binder; a metal body or a cer... | 06/21/2005 |
| 6845828 | Shaped cutting-grade inserts with transitionless diamond-enhanced surface layer A thin layer of carbide containing an ultra-hard component, such as diamond, is applied to a formed compact for a drilling tool. The compact is then subjected to a high-temperature, high-pressure process to bond it to the added layer. This process allows the use of ... | 01/25/2005 |
| 6651757 | Toughness optimized insert for rock and hammer bits An insert for a drill bit is disclosed which includes an exposed surface having a contact portion adapted to periodically contact earthen formation. The contact portion includes a polycrystalline diamond material having a hardness in the range of about 20... | 11/25/2003 |
| 6524363 | Diamond coated cutting tools and method of manufacture A coated body that has a substrate of tungsten, carbon, and cobalt, and wherein the substrate presents a surface. Eta phase is present at the surface of the substrate. Fibrous tungsten carbide grains are present at the surface of the substrate. The surfac... | 02/25/2003 |
| 6499547 | Multiple grade carbide for diamond capped insert An insert for a rolling cone earth-boring bit has a cylindrical base that interferingly presses into a mating hole formed in a cone of the bit. The insert has a convex end that extends from the base. A polycrystalline diamond cap is bonded to the convex e... | 12/31/2002 |
| 6371226 | Drag-type rotary drill bit There is provided a rotary drag-type drill bit comprising a bit body having a leading surface comprising a plurality of pads, at least some of the pads each having a wearable abrasive surface including particles of superhard material and defining an outer... | 04/16/2002 |
| 6302225 | Polycrystal diamond tool A polycrystal diamond tool is provided whose heat resistance, strength and anti-adhesion property are improved by modifying the porosity of a diamond sintered compact and which comprises a diamond sintered compact, sintered under ultra-high pressure and h... | 10/16/2001 |
| 6290008 | Inserts for earth-boring bits A polycrystalline diamond enhanced insert is disclosed. The insert includes a body portion adapted for attachment to an earth-boring bit and a top portion for contacting an earthen formation. The top portion of the insert is provided with two different co... | 09/18/2001 |
| 6260640 | Axisymmetric cutting element An abrasive compact cutting element includes an axisymmetric superhard abrasive element having a proximal cutting end, an inwardly tapered distal attachment end, and an outer surface; and an axisymmetric cemented carbide support element configured to rece... | 07/17/2001 |
| 6119798 | Rock drill bit and cutting inserts The present invention relates to a cutting insert for a rock drill bit. The rock drill bit includes a tool body (10) having a front surface (13), and a number of cutting inserts (14), each having a generally cylindrical shank portion. The cutting insert (... | 09/19/2000 |
| 6105693 | Partially enhanced percussive drill bit The present invention relates to a partially enhanced drill bit (10') for percussive drilling. The bit comprises a bit body, at least one annular row of non-enhanced buttons (11') mounted in the bit body; and at least one annular row of enhanced buttons (... | 08/22/2000 |
| 6082223 | Predominantly diamond cutting structures for earth boring A diamond cutting element for use on an earth boring drill bit, such as a rotary drag bit. The cutting element is predominately comprised of a diamond cutting structure attached to either a reduced-volume substrate or directly to a bit body, optionally us... | 07/04/2000 |
| 6073711 | Partially enhanced drill bit A partially diamond-enhanced drill bit includes a bit body, at least one annular row of non-diamond enhanced buttons mounted in the bit body, and at least one annular row of diamond-enhanced buttons mounted in the bit body radially outside of the non-enha... | 06/13/2000 |
| 5950745 | Diamond-coated button insert for drilling A button insert for a percussive drill bit comprises a carbide base and a diamond layer bonded thereto. The diamond layer forms a dome-shaped cutting surface which is of symmetrical configuration about a center axis of the insert. A crest portion of the c... | 09/14/1999 |
| 5947215 | Diamond enhanced rock drill bit for percussive drilling A rock drill bit for percussive drilling includes a steel body in which six gauge buttons and a single front button are mounted. The gauge buttons are arranged symmetrically and equally spaced about a central axis of the bit. The front button is arranged ... | 09/07/1999 |
| 5871060 | Attachment geometry for non-planar drill inserts A manufacturing method and a drill bit composite insert for performing mechanical actions that require high wear and impact resistance are provided. The composite insert has improved interface strength and improved residual stress distribution. These impr... | 02/16/1999 |
| 5769175 | Cutter assemblies for rotary drill bits A cutter for a rotary drill bit comprises a cutting table of superhard material bonded to a less hard substrate, the cutting table having a front face and a peripheral edge at least a part of which defines a convexly curved cutting region. The substrate i... | 06/23/1998 |
| 5743346 | Abrasive cutting element and drill bit An abrasive cutting element comprised of an abrasive cutting layer and a metal substrate wherein the interface therebetween has a tangential chamfer, the plane of which forms an angle of about 5° to about 85° with the plane of the surface of the cylindr... | 04/28/1998 |
| 5732784 | Cutting means for drag drill bits A drag rotary bit (10) has a bit body (12) with a center cutter element (34) for projecting from the bottom (22) of the bit body (12) at the axial center of the bit body (12). The center cutting element (34) has a pair of cutters (42) with cutting faces (... | 03/31/1998 |
| 5575342 | Percussion drill bit, an insert for use therein and a method of drilling a bore A percussion drill bit for drilling bores, comprises a drill body having a plurality of gauge row inserts embedded in a front end of the drill body. Each gauge row insert comprises a cemented carbide body having a mounting portion embedded in the drill bo... | 11/19/1996 |
