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| Number | Title | Issue Date |
| 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 |
| 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 |
| 7234541 | DLC coating for earth-boring bit seal ring An earth-boring bit has a seal assembly with a seal face having a DLC coating. The seal assembly locates between a bearing pin and a cone of the bit. The seal assembly has at least one rigid ring that rotates against a mating surface. The DLC coating is diamond-like... | 06/26/2007 |
| 7229077 | Ordered elastomeric composite material Ordered elastomeric composites comprise an ordered arrangement of a number of first elastomeric phases distributed uniformly within a continuous matrix second elastomeric phase. The second phase can be formed from an elastomeric material that is relatively harder th... | 06/12/2007 |
| 7219898 | Spring supported dual element face seal with a run surface sleeve The invention provides a seal for a rotatable shaft. The seal includes an inner case mountable to the shaft and having a body and first and second flanges extending radially outward from the body. The seal includes first and second sealing discs operable to seal aga... | 05/22/2007 |
| 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 |
| 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 |
| 7116356 | Vertically self-aligning camera mount apparatus A self-aligning apparatus comprising a ball bearing assembly mounted on a base plate and supporting an axle on which is mounted a video camera. In response to the force of gravity, the axle rotates such that the camera maintains a line-of-sight parallel to the cable... | 10/03/2006 |
| 7086487 | Anti-mud packing seal gland An earth boring bit has a seal cavity that is eccentric to agitate drilling fluid and avoid mud packing. The bit body having bit legs, each having a bearing pin. A cone rotatably mounts on the bearing pin. Teeth are formed or mounted on the cone for cutting the eart... | 08/08/2006 |
| 7052017 | Rotary machine with seal The so-called comb-type labyrinth sealing device (S1) is disposed in a gap between a rotor blade (2), i.e. a rotating member, and a labyrinth packing (9), i.e. a stationary member. The sealing device (S1) has a plurality of sealing fins (... | 05/30/2006 |
| 7044242 | Roller cone bits with reduced packing A roller-cone drill bit in which a large groove is machined into the backface of each cone, near the crack where the cone meets the arm assembly. By making the outer lip of this crack more exposed to the open volume of turbulent flow, turbulence near the crack is in... | 05/16/2006 |
| 7000712 | Bearing seal A seal assembly for a shaft supporting a rotary element comprises a sealing ring having an inner radial surface in contact with a seal surface of the shaft. The sealing ring comprising a disc shaped integral radial lip normal to the inner radial surface. A disc shap... | 02/21/2006 |
| 6905319 | Stator for down hole drilling motor An improved down hole drilling motor suitable for drilling applications. The down hole drilling motor comprising a stator disposed in the tubular housing. The stator includes an internal cavity having one or more lobes. A rotor operatively positioned in the cavity o... | 06/14/2005 |
| 6837317 | Bearing seal A seal assembly for a shaft supporting a rotary element comprises a sealing ring having an inner radial surface in contact with a seal surface of the shaft. The sealing ring comprising a disc shaped integral radial lip normal to the inner radial surface. A disc shap... | 01/04/2005 |
| 6827160 | Downhole mud motor A downhole mud motor (100) is disclosed which has an improved bearing mandrel (107) and a bearing stop (105) to transfer a larger percentage of the weight of a drill string to the bit. Also improved sealing systems (113) (114) (... | 12/07/2004 |
| 6800976 | Spindle motor with magnetic seal The present invention relates to a spindle motor with a magnetic seal. A method and an apparatus are described for sealing spindle motors, preferably those used for disk storage units. ... | 10/05/2004 |
| 6752223 | Roller cone bit with improved seal gland design In the seal gland in a rotating cone drill bit, the O-ring is initially compressed between the journal and a central portion of the gland which has a cross-section parallel to the journal. These two concentric surfaces provide a minimum amount of contact pressure fo... | 06/22/2004 |
| 6695079 | Dual-seal drill bit pressure communication system A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment, and a roller cone rotatably mounted upon the journal segme... | 02/24/2004 |
| 6684966 | PCD face seal for earth-boring bit An earth-boring bit has a mechanical face seal assembly with PCD faces. The bit has a bearing shaft with a cone rotatably mounted on the bearing shaft. The seal locates between the bearing shaft and the cone for sealing lubricant therein. The seal include... | 02/03/2004 |
| 6679342 | Dual-seal drill bit pressure communication system A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment, and a roller cone rotatably mounted upon the journal segme... | 01/20/2004 |
| 6578647 | Sealing structure for a rock drill bit A sealing structure for a rock drill bit includes an elastomeric diaphragm for installation in the drill bit so as to separate grease from drilling mud. The diaphragm has an aperture extending through it, and a plug is disposed in the aperture so as to fo... | 06/17/2003 |
| 6497226 | Modular, compliant, sealing bearing assembly An improved modular, radially-compliant, redundantly-sealing journal-type bearing assembly comprising two bearing elements retained in a housing and positively loaded in opposing directions by a compression spring disposed therebetween. A shaft to be supp... | 12/24/2002 |
| 6431293 | Dual-seal drill bit pressure communication system A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment, and a roller cone rotatably mounted upon the journal segme... | 08/13/2002 |
| 6336512 | Drill bit having canted seal A drill bit having a canted or non-canted leg backface, a canted or non-canted seal in the interface between the cone backface and the shirttail, and a canted seal that can be semi-encapsulated so that there is no straight-line path across the seal.... | 01/08/2002 |
| 6330923 | Sealing bearings in drill bits A sealed bearing for a drill bit including cutting cones and having metal sealing surfaces between the seal cup base and the rotating cone combined with a compressible neoprene or like material having an inner seal lip to seal in the prepacked bearing cav... | 12/18/2001 |
| 6279671 | Roller cone bit with improved seal gland design In the seal gland in a rotating cone drill bit, the O-ring is initially compressed between the journal and a central portion of the gland which has a cross-section parallel to the journal. These two concentric surfaces provide a minimum amount of contact ... | 08/28/2001 |
| 6264367 | Dual-seal drill bit with fluid cleaning capability A drill bit for use in an earthen annulus that contains loose particles is connected to a fluid supply source and includes a bit body having at least one journal segment and at least one fluid conduit in fluid communication with the fluid supply source. A... | 07/24/2001 |
| 6247545 | Single energizer face seal for rocks bits with floating journal bearings The present invention is a self adjusting, volume balanced, single energizer rigid face seal for rolling cutter drill bits with floating journal bearings. Volume balancing is accomplished by utilizing a floating static seal between the rigid face seal rin... | 06/19/2001 |
| 6196339 | Dual-seal drill bit pressure communication system A drill bit for use in a borehole at least partially containing drilling fluid includes a bit body having at least two bit components, including at least one leg, the leg having a journal segment, and a roller cone rotatably mounted upon the journal segme... | 03/06/2001 |
| 6176331 | Bearing sealing means of earth boring bits A bearing seal for earth boring bits is disclosed. A supporting ring is located in a groove formed in the earth boring bit. An annular cavity between the outer circumference of the supporting ring and the bottom of the groove is connected with the outside... | 01/23/2001 |
| 6176330 | Rock bit face seal having anti-rotation pins The invention provides a mechanical face seal for rotary rock bits with a novel coil spring energization system that prevents yielding of the coil springs in extreme torque conditions. Within at least one of the coil springs is a cylindrical pin designed ... | 01/23/2001 |
| 6142249 | Earth-boring bit with improved bearing seal An earth-boring bit has a bit body and at least one bearing shaft depending inwardly and downwardly from the bit body. The bearing shaft has a base where it joins the bit body. At least one cutter is mounted for rotation on the bearing shaft and has radia... | 11/07/2000 |
| 6033117 | Sealed bearing drill bit with dual-seal configuration A sealed-bearing drill bit for use in an earthen annulus is provided having a dual seal arrangement. The drill bit includes at least one leg having a journal segment, and a roller cone mounted upon the journal segment and forming at least one bearing cavi... | 03/07/2000 |
| 6026917 | Earth-boring bit with improved bearing seal An earth-boring bit has a bit body and at least one bearing shaft depending inwardly and downwardly from the bit body. The bearing shaft has a base where it joins the bit body. At least one cutter is mounted for rotation on the bearing shaft and has radia... | 02/22/2000 |
| 5992943 | Wheel end assembly A wheel mount for a wheel comprises a spindle, a hub for surrounding the spindle and a bearing assembly interposed between the spindle and the hub. The spindle extends from an end of an axle of a vehicle and has a generally decreasing diameter from its pr... | 11/30/1999 |
| 5900903 | Deflecting scanning apparatus In a deflecting/scanning apparatus, a rotating polygon mirror is rotatably supported by an air bearing constituted by a stationary shaft and a rotating sleeve which are made of a ceramic material. An upper portion of an end face of the rotating sleeve is ... | 05/04/1999 |
| 5875861 | Different stiffness energizers for MF seals A rolling cutter drill bit has at least one roller cutter mounted on a cantilevered bearing shaft with a sealed bearing and lubrication system, lubricant pressure balancing means, lubricant pressure relief means, and a volume compensating rigid face seal ... | 03/02/1999 |
| 5524718 | Earth-boring bit with improved bearing seal assembly An earth-boring bit has a bit body, at least one cantilevered bearing shaft, including a base and a cylindrical journal bearing surface extending inwardly and downwardly from the bit body, and at least one cutter mounted for rotation on the cylindrical jo... | 06/11/1996 |
| 5513715 | Flat seal for a roller cone rock bit A flat seal (32) for a roller cone rock bit (10) is provided. Flat seal (32) includes a ring-shaped metallic spring (80). Metallic spring (80) has an inner face (88) with an annular inner edge (92) for contacting a sealing surface (72) of a cone (18) in a... | 05/07/1996 |
| 5456327 | O-ring seal for rock bit bearings An improved O-ring seal for rock bit bearings comprises a body formed from a resilient elastomeric composition and a modified surface comprising a surface enhancing material integral with the body. The surface comprises a layer of surface enhancing materi... | 10/10/1995 |
