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| Number | Title | Issue Date |
| 8109177 | Bit body formed of multiple matrix materials and method for making the same Drill bit bodies are provided having one portion formed of one composition and a further portion formed of a different composition. The different compositions provide different functional properties to respective portions of the drill bit body. Methods for forming s... | 02/07/2012 |
| 8065935 | Method of manufacturing a rotary drill bit A rotary drag bit for drilling a subterranean formation includes a plurality of support elements affixed to the bit body, each forming at least a portion of a cutting element pocket. Each of a plurality of cutting elements has a substantially cylindrical body and is... | 11/29/2011 |
| 8011275 | Methods of designing rotary drill bits including at least one substantially helically extending feature A method of designing a rotary drill bit includes selecting and positioning a plurality of cutting elements on a rotary drill bit. At least one substantially helically extending feature is selected and positioned to rotationally follow at least one of the plurality ... | 09/06/2011 |
| 7703354 | Method of forming a nozzle retention body A method for forming a nozzle retention body suitable for engagement to a drill bit includes manufacturing an unfinished nozzle retention body which includes an upper end and a lower end. The upper end forms an inlet that transitions into a flowbore. The lower end h... | 04/27/2010 |
| 7594454 | Methods of fabricating 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 b... | 09/29/2009 |
| 7401537 | Cutter insert gum modification method and apparatus A method and apparatus for treating a cutter ring adapted to be used in tunnel boring operations; forming an initial cutter ring and heat treating the cutter ring prior to a laser client process; applying an alloy to the surface of the cutter ring adjacent to cuttin... | 07/22/2008 |
| 7296497 | Method and device for manufacturing a drill blank or a mill blank The present invention relates to a method for manufacturing a drill blank or a mill blank by extrusion, said method comprising the forming of a first blank portion (B1) having external, axially extending external flutes and the forming of a further blank port... | 11/20/2007 |
| 7264427 | Drill bit apparatus A drill bit apparatus having a central shaft and an annular collar mounted thereon. The central shaft is coaxially positioned within the annular collar. The central shaft has a bit end and a cutting tool end. The annular collar is spaced between the bit and cutting ... | 09/04/2007 |
| 7216565 | Methods of manufacturing and repairing steel body rotary drill bits including support elements affixed to the bit body at least partially defining cutter pocket recesses A steel body rotary drag bit for drilling a subterranean formation includes a plurality of support elements affixed to the bit body, each forming at least a portion of a cutting element pocket. Each of a plurality of cutting elements has a substantially cylindrical ... | 05/15/2007 |
| 7214009 | Drilling tool A drilling tool consisting of a drill shank having a drill point and of a transition section which adjoins the drill shank in the axial direction and which merges into a clamping shank, the transition section being heat-treated in such a way that it has higher bendi... | 05/08/2007 |
| 7210377 | Cone erosion protection for roller cone drill bits A method of forming a drill bit structure, the method including fixing spacers to the drill bit structure. The spacers are arranged at preselected locations on an outer surface of the drill bit structure. A hardfacing material is then applied to the drill bit struct... | 05/01/2007 |
| 7207755 | Tool arrangement and tool for chip removal In a cutting tool arrangement and a tool for chip removing machining, the cutting tool arrangement comprises a tool, fastening arrangement, and a shank. The tool is a one-piece unit. The axial channel is of non-circular cross-section to provide a key grip. An end of... | 04/24/2007 |
| 7194933 | Composite circular slicer knife A substantially circular slicer knife is provided having an interior base portion made of a first material and an outer edge portion made of a second material. The outer edge portion is metallurgically bonded to the interior base portion. ... | 03/27/2007 |
| 7179023 | Tool insert A method of producing a tool insert which comprises a central metal portion having edge regions of superabrasive material bonded thereto and presenting cutting edges or points for the tool insert is disclosed. A body (50) having major surfaces on each of oppo... | 02/20/2007 |
| 7134813 | Cooling channel geometry A drilling tool comprising at least one machined groove and at least one web which extend from a tip of the tool to the shank of the tool. A main cutting edge and an inner cooling channel are formed on each web. Said cooling channel extends from the tip to an opposi... | 11/14/2006 |
| 7131384 | Seed tube guard assembly for agricultural planters A seed tube guard assembly for agricultural planters has floating wear plates to improve the wear life of the seed tube guard. The assembly includes a support bracket having an upper end attached to a planter shank assembly and a lower end positioned between a pair ... | 11/07/2006 |
| 7104160 | Method of making a cutting tool 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, unsintered layer including ... | 09/12/2006 |
| 7083367 | Adaptor device for holding a blade An adapter device is disclosed for holding a blade having a first and a second side onto a distal end of a holder of a spade drill. The adapter device includes a body of generally cylindrical configuration, the body having a first and a second extremity. The body de... | 08/01/2006 |
| 6957937 | Spade bits with angled sides A spade drill bit has a shaft and a spade head portion arranged on the shaft. The head portion has a rearward facing bottom edge, two longitudinal sides and a forward facing cutting edge. The cutting edge has a pointed, generally triangularly shaped tip and outer en... | 10/25/2005 |
| 6935636 | Arrangement for the detachable mounting of a rotatable tool on a drive shaft Rotatable tool coupled to support body, and drive shaft detachably mounted to rotatable tool, such that rotatable tool is drivable in a working direction, in which support body includes an inlet opening defined by at least three eccentric segments and drive shaft in... | 08/30/2005 |
| 6923112 | Juice extractor including cutter components for enhanced quality and yield performance and associated methods A juice extractor includes first and second cups being relatively movable along a reciprocal path of travel to compress fruit therebetween during juice extraction. The extractor also includes a first cylindrical cutting blade within a first cup bore in spaced relati... | 08/02/2005 |
| 6908267 | Variable radii cutter A variable radii cutter which eliminates the need for having to provide a wide assortment of cutting tool bits for continuously imparting various sizes of radii on a workpiece is disclosed. In one embodiment, the variable radii cutter has a cutter in the form of a p... | 06/21/2005 |
| 6890132 | Bolt on drive assembly for a core drill A bolt on drive assembly for a core drill which utilizes a spoked reinforcer mounted between a pair of discs. The discs are removably mounted on the tube by bolt fasteners. A drive connection is removably mounted and centrally located on a outer disc of the pair of ... | 05/10/2005 |
| 6860172 | Method for making a powdered metal compact A method for producing a powdered metal compact for a cutting head to be used in a metal cutting tool uses a punch and die assembly. The resulting cutting head has apertures communicating between a coolant channel and recesses. ... | 03/01/2005 |
| 6588520 | Rock drill A rock drill has at least one hard material insert (2) with at least two cutting edges (3, 7) consisting of hard material and extending radially to the drill axis (A), whereby, in a radial range of 20% to 50% of their drilling radius, at least two cutting... | 07/08/2003 |
| 6575674 | Reaming tool and process for its production A multi or single cutter reaming tool has a shaft and a shaped head with at least one cutter. The shaped head is produced from a blank having a base body of a base material on its envelope surface with at least one rectilinear or helical groove-shaped rec... | 06/10/2003 |
| 6568883 | Method of finishing inner circumferential surface, and reamer A reamer includes: (a) an axially-distal-end small-diameter portion; (b) a guide portion which is axially adjacent to the small-diameter portion; (c) at least one flute which is formed in an outer circumferential surface of the reamer and which extends fr... | 05/27/2003 |
| 6540452 | Drilling tool for machine tools and method for the production thereof The invention relates to a drilling tool for machine tools and to a method for the production thereof. The drilling tool has at least one chip conveyor groove (16) and at least one functional channel (20). In order to produce the body of the drill (10), t... | 04/01/2003 |
| 6536305 | Cutting plate and method of pressing a cutting plate The cutting plate for a drill bit is press-formed from a powdery starting material. In the process, the cutting plate is arranged horizontally in the press die and the relative movement of top punch and bottom punch with respect to the die is effected par... | 03/25/2003 |
| 6487938 | Paper drill bit There is provided a process for the treatment of a paper drill bit comprising the steps of subjecting the drill bit to deep cryogenic treatment, and coating the drill bit with a dry film fluorocarbon lubricant is a resin-bonded fluoropolymer coating.... | 12/03/2002 |
| 6415687 | Rotary cone drill bit with machined cutting structure and method A rotary cone drill bit is provided with at least one cutter cone assembly having a machined cutting structure which will maintain an effective cutting profile despite abrasion, erosion and/or wear of the associated cutting elements. The machined cutting ... | 07/09/2002 |
| 6353771 | Rapid manufacturing of molds for forming drill bits A mold is formed for an building earth boring bit by designing the bit geometry in three dimensions using a computer aided design (CAD) system and then feeding the geometry data of the design to a layering device. The layering device then builds the mold ... | 03/05/2002 |
| 6283477 | Annular chamber seal Internal and external metal-to-metal radially interfering seals are provided for an annular chamber. Typically, an annular chamber is used in tubular goods to be part of the hydraulic control circuitry, such as for operating subsurface equipment such as a... | 09/04/2001 |
| 6200076 | Cutting tool and method for producing the same A method for producing cutting tools incorporated in the present invention is carried out as follows: a shank portion and a drill portion are formed separately such that the inner diameter of a hole made in the shank portion is slightly smaller than the o... | 03/13/2001 |
| 6182533 | Method of making a drill blank 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 of ultra-hard abra... | 02/06/2001 |
| 6158304 | Process for forming a center cutting end mill A center cutting or plunging end mill or ball nose end mill has one or more spiral grooves and flutes in the walls of a mill body of cemented tungsten carbide. Each groove includes polycrystalline diamond or cubic boron nitride formed in situ along a lead... | 12/12/2000 |
| 6145410 | Bandsaw blade A method of making a cutting blade using a fiber composite tape formed into a continuous closed loop. The tape is selected and prepared such that at least some of the fibers form an acute angle with the cutting edge.... | 11/14/2000 |
| 6123489 | Drilling tool for machine tools and method of producing the same A drilling tool includes a tool head having at least one chip groove and a tool shank. A slotted sleeve is placed on the tool shank and closely surrounds the chip groove. The edges adjacent the slot lie on solid material of the tool shank. The chip groove... | 09/26/2000 |
| 6100494 | Insert for an abrasive tool A method is provided for producing two or more inserts for an abrasive tool. Each insert includes an abrasive compact layer bonded to a support layer along an interface which has a discontinuity in the form of at least one recess extending into one of the... | 08/08/2000 |
| 6058807 | Cutting tool and method for producing the same A method for producing cutting tools incorporated in the present invention is carried out as follows: a shank portion and a drill portion are formed separately such that the inner diameter of a hole made in the shank portion is slightly smaller than the o... | 05/09/2000 |
