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| Number | Title | Issue Date |
| 7946768 | Bearing apparatuses, systems including same, and related methods A bearing apparatus is disclosed. Such a bearing apparatus may comprise a rotor including at least one bearing element mounted to the rotor and a stator including at least one bearing element mounted to the stator. At least one compliant member may be positioned bet... | 05/24/2011 |
| 7703982 | Bearing apparatuses, systems including same, and related methods A bearing apparatus is disclosed. Such a bearing apparatus may comprise a rotor including at least one bearing element mounted to the rotor and a stator including at least one bearing element mounted to the stator. At least one compliant member may be positioned bet... | 04/27/2010 |
| 7559695 | Bearing apparatuses, systems including same, and related methods Bearing apparatuses (e.g., thrust bearings and radial bearings) are disclosed. Such bearing apparatuses may comprise a rotor including a rotor surface comprising a first superhard material and a stator surface comprising a second superhard material. In one embodimen... | 07/14/2009 |
| 7465096 | Earth boring bit with tilted hydrodynamic thrust bearing An earth boring bit has thrust faces with one of the thrust faces being at least partially tilted relative to the other. The bit has a cone rotatably mounted to a bearing pin of the bit body. The thrust faces are in the cone and on an end of the bearing pin. One of ... | 12/16/2008 |
| 7387177 | Bearing insert sleeve for roller cone bit An earth boring bit has a bearing pin with a sleeve mounted on it. The sleeve is fixed against rotation but able to float relative to the bearing pin. A cone fits over and forms a bearing surface with the sleeve. The sleeve and bearing pin are configured to have a c... | 06/17/2008 |
| 7358674 | Structure having electrodes with metal core and coating A conductive element comprises a metal core and a coating, wherein the coating comprises at least one layer of aluminum, an aluminum alloy, an aluminide, silicon, a silicon alloy, a silicide, and combinations thereof, and wherein the at least one layer has a predete... | 04/15/2008 |
| 7347290 | Multi-part energizer for mechanical seal assembly An energizer for a mechanical seal assembly for use in a drill bit is disclosed. The energizer is a composite of at least two resilient materials, one having a durometer hardness that is greater than the other. The material contacting a journal provides relatively h... | 03/25/2008 |
| 7241049 | Micropore engagement surfaces for earth boring bit An earth boring bit has sliding engaging surfaces between a cone assembly and a bearing pin. Micropores are formed in at least one of the engaging surfaces. Each of the micropores has a leading portion and a trailing portion. The leading portion is at a more gradual... | 07/10/2007 |
| 7240973 | Crawler, crawler pin, crawler bush, and crawler manufacturing method A crawler having a crawler pin and a crawler bush having lubrication between the crawler pin and the crawler bush without lowering the strength of the crawler at the running time, thereby to prevent the creak or seizure, as might otherwise be caused at the running t... | 07/10/2007 |
| 7237627 | Bearing and lubrication system for earth boring bit Methods and apparatus for maintaining lubrication of rolling cone cutters mounted on journal pins. Embodiments comprise a rotating cone disposed on a journal pin and forming a journal gap there between. A cylindrical journal sleeve is disposed in the journal gap. Th... | 07/03/2007 |
| 7188691 | Metal seal with impact-absorbing ring Disclosed is a seal assembly for dynamically sealing between rotatable members, such as employed to seal the rolling cone of a rock bit. One preferred assembly includes an energizer, first and second seal rings, and a cushioning ring having an L-shaped cross-section... | 03/13/2007 |
| 7128171 | Hydrodynamic pump passages for rolling cone drill bit An earth boring bit has rotating cones with two lubricant passages to increase bearing capacity and cause lubricant circulation. A lubricant reservoir in the body supplies lubricant to passages between the cone and bearing pin. A pressure compensator equalizes lubri... | 10/31/2006 |
| 7117961 | Dynamic seal with soft interface A device and method for dynamically sealing between rotatable members such as a rolling cone of a rock bit. The assembly includes a seal ring having a facing surface of a relatively hard material, such as hardened steel or tungsten carbide, and a second seal ring of... | 10/10/2006 |
| 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 |
| 7011170 | Increased projection for compacts of a rolling cone drill bit An earth boring bit has rolling cones rotatably mounted to the bit legs. Each cone has conical bands extending around the exterior. Holes are formed in each of the bands. Compacts are press-fitted into the holes, each having a cutting tip that projects from the coni... | 03/14/2006 |
| 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 |
| 6708786 | Mounting attachment and bearing system for an industrial earth-boring cutter A rotary cutter mount for an earth-boring cutter includes a bearing journal adapted to be coupled to a cutter body. A first mounting end of the bearing journal is shaped to enable rotationally fixed positioning in a corresponding yoke. The yoke is operatively couple... | 03/23/2004 |
| 6637528 | Bit apparatus A bit apparatus in which a cutter member having cutting teeth is axially supported on a shaft for rotation about the shaft, and a bearing mechanism is interposed between the cutter member and the shaft. The bearing mechanism includes at least a radial bea... | 10/28/2003 |
| 6460635 | Load responsive hydrodynamic bearing A load responsive hydrodynamic bearing is provided in the form of a thrust bearing or journal bearing for supporting, guiding and lubricating a relatively rotatable member to minimize wear thereof responsive to relative rotation under severe load. In the ... | 10/08/2002 |
| 6416224 | Rolling cutter drill bits A rolling cutter drill bit comprises a body and three legs, each leg having a cantilevered bearing spindle, a roll cutter rotatably mounted on the bearing spindle, a lubricating system within the spindle, and a tubular bearing element located radially bet... | 07/09/2002 |
| 6354740 | Rolling cutter drill bits A rolling cutter drill bit comprises a body and three legs, each leg having a cantilevered bearing spindle, a rolling cutter rotatably mounted on the bearing spindle, lubricant delivering means within the bearing spindle, and a floating thrust bearing ele... | 03/12/2002 |
| 6260635 | Rotary cone drill bit with enhanced journal bushing The present invention allows the load carrying capability of a drill bit journal bearing or bushing to be increased. The present invention increases the length of the journal bushing by using the ball bearings to retain the journal bushing at a desired lo... | 07/17/2001 |
| 6220374 | Rotary cone drill bit with enhanced thrust bearing flange The present invention allows the load-bearing capabilities of a drill bit thrust flange to be increased. The invention utilizes a thrust flange that is larger than the inside diameter of an associated drill bit journal bushing. The thrust flange may exten... | 04/24/2001 |
| 5868502 | Thrust disc bearings for rotary cone air bits A first embodiment of a radially disposed thrust bearing assembly for rotary cone rock bits consists of a first non-rotating radially disposed steel thrust bearing disc and an adjacent, carbide thrust bearing disc. One of the thrust bearing discs is press... | 02/09/1999 |
| 5853245 | Rock bit cutter retainer with differentially pitched threads A novel split threaded ring bearing member for rolling cutter drill bits with at least a portion of its threads having a different pitch than its mating threads is disclosed. The pitch difference is designed so that the threaded ring can be seated or othe... | 12/29/1998 |
| 5842531 | Rotary rock bit with infiltrated bearings A rotary rock bit is formed as a rock bit body, a bearing shaft supported by the rock bit body, a rotary cutter adapted to be rotatably mounted on the bearing shaft, and at least one bearing that promotes rotation between the rotary cutter and the bearing... | 12/01/1998 |
| 5794726 | Rotary rock bit with infiltrated bearings A rotary rock bit is formed as a rock bit body, a bearing shaft supported by the rock bit body, a rotary cutter adapted to be rotatably mounted on the bearing shaft, and at least one bearing that promotes rotation between the rotary cutter and the bearing... | 08/18/1998 |
| 5642942 | Thrust plugs for rotary cone air bits A radially disposed thrust bearing assembly for air cooled and lubricated mining type rotary cone rock bits consists of a first non-rotating radially disposed steel thrust bearing disc and an apposed, non-rotating carbide thrust bearing disc. One of the t... | 07/01/1997 |
| 5598895 | Cutter assembly having a plurality of independently rotatable cutting units thereon A rock cutting tool with a plurality of independently rotatable cutter units and with a shaft, a sleeve located around the shaft, and at least two rotatable hubs located around the sleeve. At least one cutter unit is located on each of the two rotatable h... | 02/04/1997 |
| 5593231 | Hydrodynamic bearing A hydrodynamic bearing (16) for a cutter cone assembly (12) that rotates around a journal (14). The bearing (16) comprises a plurality of grooves (88) on an outer surface (90) to produce undulations (82) on an inner surface (84) upon insertion of the bear... | 01/14/1997 |
| 5586611 | Drill bit having dual split bushings for cutter support and retention A rotary cutter cone type drill bit having a body structure with a plurality of depending cutter support lugs each having a spindle integral therewith and defining a cylindrical bushing support surface and a spindle head. A cutter cone is positioned for r... | 12/24/1996 |
| 5520492 | Sliding parts and method of producing same A sliding part having a metallic main body which is formed with a silver plating layer over a surface thereof slidable in contact with other metallic part. The silver plating layer has a crystal structure so adapted that the intensity of diffraction X-ray... | 05/28/1996 |
| 5518820 | Case-hardened titanium aluminide bearing A bearing includes a bearing component, such as a bearing race, having a bearing contact surface. A region at the bearing contact surface is made of titanium aluminide, preferably an alpha-2 or gamma titanium aluminide. A case-hardened layer present at th... | 05/21/1996 |
| 5499688 | PDC insert featuring side spiral wear pads The present disclosure sets forth various forms of inserts for operating as elements in bearing drill bits and similar devices. A single insert is formed with an external side face of cylindrical construction. One or more strips of hardened materials such... | 03/19/1996 |
| 5498081 | Bearing assembly incorporating shield ring precluding erosion A mud motor bearing assembly is defined by and constructed with a support or base ring having an exposed upper or planar face. On the planar face, a number of PCD disc are attached to define a bearing surface at a common plane. The improved bearing assemb... | 03/12/1996 |
| 5485891 | Cone drill bit A cone drill bit includes legs and attached to them trunnions with cones mounted thereon. A support unit for mounting the cones upon the trunnions includes a strengthened radial thrust ball bearing which transmits a load directed along a cone centerline. ... | 01/23/1996 |
| 5342129 | Bearing assembly with sidewall-brazed PCD plugs A method of forming a bearing assembly is set forth. A PCD disk typically of circular construction is joined to a cylindrical plug formed of support metal. The plug is registered with respect to an internal shoulder in a passage formed in a ring for the b... | 08/30/1994 |
| 5217080 | Sealing system for a sealed bearing assembly An improved sealing system for a sealed bearing assembly used in earth drilling. The bearing assembly has a first tubular member, and a second tubular member telescopically received in the first tubular member. The second tubular member has an interior pa... | 06/08/1993 |
| 5199516 | Modular drill bit A modular drill bit mounts legs within recesses in a body which are parallel to the central axis of the body using threaded studs with tapered outer portions, in conjuction with an attached pin having recesses therein receiving the upper ends of the legs.... | 04/06/1993 |
| 5161898 | Aluminide coated bearing elements for roller cutter drill bits A roller cutter drill bit (10) has separate bearing elements (82, 84, 86) positioned between a journal (20) and a roller cutter (60) mounted for rotation on the journal (20). The bearing elements (82, 84, 86) are formed of a superalloy material and the be... | 11/10/1992 |
