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| Number | Title | Issue Date |
| 7785012 | Bearing arrangement A bearing arrangement comprises a first component 10 and a second component 12, bearings 14, 16 being provided to support one of the first and second components 10, 12 for rotation relative to the other of the first and second components ... | 08/31/2010 |
| 7635224 | Method of adjusting backlash in a down hole bearing assembly A method of adjusting backlash in a down hole bearing assembly involves providing in side by side relation on an outer surface of an inner mandrel a circumferential first threaded seat adapted to accommodate a first nut which engages the first threaded seat by rotat... | 12/22/2009 |
| 7500787 | Bearing assembly for downhole mud motor A bearing assembly for use with a mud motor includes a two-piece mandrel and a housing. Two radial bearings and a triple stack axial thrust on-bottom bearing are disposed between the mandrel and housing. ... | 03/10/2009 |
| 7316508 | Propeller shaft bearing A propeller shaft bearing includes a substantially cylindrical sleeve having a structure including an inner layer and an outer layer that surrounds the inner layer. The inner layer is made of a bearing material that includes a thermosetting resin. The outer layer is... | 01/08/2008 |
| 7309163 | Thrust bearing assembly with a stack of thrust bearing members A thrust bearing configuration for rotary applications includes a shaft (12) having an external surface (14) and a housing (16) having an internal surface (18). The housing and the shaft are adapted for relative rotational movement. Inner... | 12/18/2007 |
| 7199497 | Frameless switched reluctance motor and application as a top drive for a rotary pump A frameless switched reluctance motor (SRM) has a stator sandwiched between two housings. Axial load on the rotor shaft is directed through a first bearing, through the first housing to the stator and through the second housing to a motor support. Heat is dissipated... | 04/03/2007 |
| 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 |
| 6902452 | Marine split bearings with right angle removeable grooved retainer covers A sternpost or strut bearing assemblage is disclosed having a flat mounting plate integrally formed with a pair of separated collars, which collars have their centers longitudinally aligned with each other to receive a vessel's drive shaft. A pair of opposed split b... | 06/07/2005 |
| 6837621 | Rotor bearing for increased lubricant flow Disclosed is an improved hydrodynamic bearing assembly for use in a motor assembly. The motor assembly typically includes a shaft with an axially oriented fluid channel and at least one radial shaft port extending through the wall of the shaft. The bearing assembly ... | 01/04/2005 |
| 6416225 | Bearing assembly for wellbore drilling A bearing assembly is disclosed for use with a mud motor. The bearing assembly includes at least three radial bearings to protect the flow restrictor of the bearing assembly against harmful sideways and lateral loading. The bearing assembly also includes ... | 07/09/2002 |
| 6250806 | Downhole oil-sealed bearing pack assembly A downhole oil-sealed bearing pack assembly is provided for protecting bearing elements and seals. The bearing pack assembly includes a non-contact flow restrictor for reducing large differential pressures across sealing elements. The non-contact flow res... | 06/26/2001 |
| 6244359 | Subsea diverter and rotating drilling head A drilling head used to seal around a drill pipe while drilling is employed in a subsea location. The drilling head has an inner body located within an outer body. At least one bearing is located between the outer body and the inner body for facilitating ... | 06/12/2001 |
| 6238093 | Partial arc bearing assembly and method of making the same A bearing assembly for supporting a drive shaft includes a cylindrical housing, and a plurality of elastomeric bearing sections disposed within the housing. The bearing sections are bonded to the housing by first applying a pattern of alternating parallel... | 05/29/2001 |
| 6193572 | Propeller assembly including a cantilever spring A propeller assembly that includes, in an exemplary embodiment, a cantilever spring for securing a propeller to a propeller shaft is described. In the exemplary embodiment, the propeller assembly includes a thrust bearing which tightly fits to an inclined... | 02/27/2001 |
| 6109790 | Lubricant circulation system for downhole bearing assembly An improved lubricant cooling system for a sealed bearing section used in drilling with downhole motors comprises a radial bearing or bearings which preferably contain internal and external spiral grooves such that rotation of the central hollow shaft whi... | 08/29/2000 |
| 5887982 | Bearing assembly for use with a submerged apparatus and method for performing maintenance thereon The present bearing assembly is for use with a wastewater treatment apparatus which is driven by a drive shaft, e.g., cog rake bar screens, or water treatment apparatus, e.g., paddle wheels in flocculation mixing tanks, and submerged, partially submerged ... | 03/30/1999 |
| 5860745 | Bearing assembly A bearing includes an annular rubber-like member having a metal sleeve bonded on the inside diameter. One or more collars are sweated onto a shaft and provide one component of a lug and groove torque connection, the metal sleeve providing the other compon... | 01/19/1999 |
| 5803611 | Marine bearing assembly A marine bearing assembly for a propeller shaft suitable for a vessel which travels in intensely cold seawater where a conventional bearing, as a result of its contraction, would seize the shaft and prevent it from rotating. The assembly includes a cylind... | 09/08/1998 |
| 5765950 | Thrust bearing assembly A thrust bearing assembly for a submersible motor assembly of a submersible pump assembly comprising first and second bearing members or plates and first and second bearing holders contained within a housing. Each bearing plate is in the form of a disk ha... | 06/16/1998 |
| 5690434 | Downhole tool bearing assembly A downhole tool bearing assembly is provided which utilizes a secondary annular threaded locknut and a compression ring in order to take up tolerance stack-up and to provide supplemental preload through a bearing housing assembly, thus helping to ensure a... | 11/25/1997 |
| 5385407 | Bearing section for a downhole motor A bearing section for a downhole motor that is coupled to a drill pipe string and that has a power section, a bearing section and a drill bit section. The improved bearing section includes a first drilling fluid lubricated bearing assembly being located b... | 01/31/1995 |
| 5370400 | Fluid environment sealing system A sealing system for effecting a seal around a rotatable cylindrical shaft. The system is intended to be employed with a shaft which extends through a wall, such as a boat hull, into an aqueous environment. The system employs an elastomeric seal which def... | 12/06/1994 |
| 5350242 | Bearing assembly for a downhole motor A bearing assembly for a downhole motor consisting of a plurality of notches in one of an exterior surface of an inner mandrel and an interior surface of a housing. The notches are upwardly inclined from a base. A plurality of pins are disposed between th... | 09/27/1994 |
| 5346314 | Bearing assembly and vessel turret assembly A bearing assembly comprises one side exposed to a fluid and the other side to a dry area or compartment(s) which can be emptied. To replace part(s) of the bearing assembly a compartment is located in the compartment(s) through which a section of the bear... | 09/13/1994 |
| 5289068 | Two-stage submersible propulsor unit for water vehicles A two-stage submersible propulsor unit comprises a shroud having a water inlet and a water outlet, a shaft assembly centrally mounted within the shroud, an upstream and a downstream propeller, each of which includes a separate hub rotatably mounted on the... | 02/22/1994 |
| 5248204 | Short stack bearing assembly A mud motor bearing assembly is disclosed for an oil-lubricated downhole drill mud motor. A number of parallel sets of angular contact ball bearings are located between the mandrel and the bearing housing in a sealed, oil-filled chamber to provide all com... | 09/28/1993 |
| 5220231 | Integral motor propulsor unit for water vehicles The submersible propulsor unit of the invention comprises a cylindrical shroud having a water inlet and a water outlet, a propeller having a hub rotatably mounted within the shroud on a shaft, and an electric motor for driving the propeller that includes ... | 06/15/1993 |
| 5209577 | Downhole rotating machine having compliant radial bearings The invention provides a downhole rotating machine having a compliant radial bearing system. The compliant radial bearings in accordance with the present invention utilize a variable dimension fluid chamber between adjacent components in the bearing syste... | 05/11/1993 |
| 5150972 | Method of increasing the off bottom load capacity of a bearing assembly A method of increasing the off bottom load capacity of a bearing assembly having an outer tubular member, an inner tubular member telescopically received within the outer tubular member, and bearings disposed between the inner tubular member and outer tub... | 09/29/1992 |
| 5143455 | Bearing sleeve with notched end A bearing includes an annular rubber member having a metal sleeve bonded in the inside diameter. In one embodiment, the metal sleeve and shaft associated with the bearing provide a keyway having a key therein mounting the bearing for rotation with the sha... | 09/01/1992 |
| 5037212 | Bearing structure for downhole motors A bearing assembly for a downhole motor comprising a pair of annular support rings, each having a plurality of polycrystalline diamond thrust bearing inserts mounted thereon. The rings are oriented to have the respective inserts face and bear against each... | 08/06/1991 |
| 4993848 | Thrust bearing system for counter-rotating propeller shafts, particularly ships propeller shafts Two propeller shafts are disposed coaxially one within another. A collar of the inner propeller shaft grips into the hollow outer propeller and supports the inner shaft axially over axial friction bearing elements. The axial friction bearing elements are ... | 02/19/1991 |
| 4943172 | Drill deck bushing A shock absorbing roller deck bushing for rotary blast hole drills has a steel inner liner with a cylindrical axial bore for receiving a drill string. The liner is rotatably disposed within an outer shell mounted in the drill deck. A split retainer plate ... | 07/24/1990 |
| 4932795 | Electrically conductive plastic bushings for marine propulsion devices A marine propulsion device is provided including a propulsion unit adapted to be mounted on a boat for pivotal movement relative thereto about a generally vertical steering axis, the propulsion unit having a propeller shaft supporting a propeller, an inte... | 06/12/1990 |
| 4896367 | Anti-corrosive stuffing box assembly In a well pumping unit of the type employing a polished rod, a stuffing box is disposed at the upper end of the wellhead which has axially spaced bearing assemblies, and packing coils positioned between a bearing section at either end of each assembly to ... | 01/23/1990 |
| 4861294 | Shaft pressure ring and method for lubricating shaft log seals A shaft pressure ring for use in conjuction with a boat having an inboard motor and a drive shaft protruding through a shaft logseal assembly mounted in the hull of the boat, the hull including a shaft log area surrounding the drive shaft, the shaft press... | 08/29/1989 |
| 4810105 | Bearing sleeves In order to support a mud-driven impeller of a down-hole turbogenerator in such a manner as to provide long bearing service life in the hostile conditions down-hole, a bearing sleeve is provided which comprises an outer shell of marine brass and an inner ... | 03/07/1989 |
| 4802430 | Composite rudder seal A bearing assembly for use on a rudder shaft of a vessel or boat wherein the shaft has a thin cylindrical rubber sleeve that encompasses it. The outer peripheral surface of the rubber sleeve is bonded to a fiberglass ring which is bonded to an elongated a... | 02/07/1989 |
| 4795273 | Propeller shaft bearing arrangement The invention relates to a method for preventing leaks in a propeller shaft bearing arrangement including a plain bearing (2), which is lubricated with oil or water and which supports the propeller shaft (1) extending through an opening in the body (4) of... | 01/03/1989 |
| 4764036 | PCD enhanced radial bearing Bearing rings containing PCD faced bearing inserts are mounted adjacent tungsten carbide radial bearing surfaces at the ends of respective bearing sleeves attached to the drive shaft of a down hole well drilling motor, thereby preventing excessive wear at... | 08/16/1988 |
