Abstract: In one aspect, an improved electric transmission assembly is provided that includes a hydrodynamic bearing. The electric transmission assembly includes a stator arranged inside of an outer housing. A rotor is configured to be rotatably driven by the stator. The rotor can include a rotor shaft having a first gear configured to driveably engage with a differential. A hydrodynamic bearing is arranged between the rotor shaft and the outer housing. The hydrodynamic bearing is formed from a non-conductive material. Specifically, the hydrodynamic bearing can be formed from a polymeric or plastic material. In one aspect, the hydrodynamic bearing is formed from a non-metallic material.

Abstract: A high-precision slide bearing includes a substrate of sintered metal and a synthetic resin layer. The bearing can be used for rotary shafts in compressors of room air-conditioners or in transmissions of motor vehicles and construction machines to support relatively large radial and axial loads. The resin layer is integrally superposed on the radially inner surface of the sintered metal substrate of the slide bearing, which is a cylindrical member. The resin layer is made of a resin composition of an aromatic polyetherketone resin containing a fibrous filler. The fibrous filler is made up of fibers dispersed in the resin layer and oriented such that their length directions intersect the rotational direction of the bearing at angles of 45 to 90 degrees. The resin layer has a thickness of 0.1 to 0.7 mm.

Abstract: The sliding bearing has a metallic outer ring and a self-lubricating liner formed on the inner circumferential surface of the outer ring. The self-lubricating liner has a self-lubricating resin composition consisting of a mixture of 60 to 80% by weight of polyetherketone-based resin, 10 to 30% by weight of polytetrafluoroethylene, 5 to 15% by weight of carbon fiber and not more than 15% by weight of aramid fiber, total amount of the carbon fiber and the aramid fiber being 10 to 25% by weight. The inner circumferential surface of the outer ring has a surface roughness in terms of center line average roughness not less than Ra 4.0 ?m and a surface roughness in terms of maximum height not less than Rmax 30.0 ?m; and the outer ring and the self-lubricating liner are unified. A method of producing the bearing is also provided.

Abstract: A housing for a fluid lubrication bearing apparatus is formed of a resin composition containing polyphenylene sulfide (PPS) as a base resin. The ratio of the base resin to the resin composition is not lower than 40 vol % but not higher than 70 vol %. Moreover, in the composition, an epoxy compound having two or more epoxy groups per molecule of the compound and epoxy value of 0.5 meq/g or more to the resin composition may be added so that the amount of epoxy groups in the resin composition is 8 meq/100 g or more. A carbon fiber may also be added to the resin composition in an amount of not less than 10 vol % but not more than 35 vol %. An inorganic compound may be further added to the resin composition to be the remainder of the resin composition.

Abstract: An inventive ball bearing retainer (4) is entirely composed of a resin composition, and has pocket surfaces (6) for retaining balls (5) and projections (8) provided on the pocket surfaces (6) and containing a solid lubricant (CB). A ball bearing (1) incorporates the ball bearing retainer (4). By the effect of the solid lubricant (CB), the projections (8) are less liable to be worn out in a short period particularly when the ball bearing (1) is used in a higher temperature environment. The projections (8) define clearances between the balls (5) and the pocket surfaces (6), making it possible to maintain the effect of preventing noise, increase in the torque of the ball bearing (1), reduction of the service life of a lubricant and the like for a longer period of time.

Abstract: The object of this invention is to provide a hybrid composite journal bearing which is constructed so that a composite liner is positioned on an inner surface of a metal housing having a circular cross-section, thus preventing a journal from being damaged or seized to the bearing, due to friction between the metal or composite journal and the journal bearing. The hybrid composite journal bearing (210) includes a metal housing (211) which is secured on an outer surface thereof to a bearing system and has a circular cross-section. A composite liner (212) is laminated to an inner surface of the metal housing (211) with a uniform thickness so as to minimize friction between the journal bearing and a journal.

Abstract: A multi-layer plane bearing has a bearing layer and a gliding layer connected to it. The gliding layer includes at least one thread layer treated with an epoxy resin. The thread layer is made up of a multitude of threads of at least one thread type arranged in a given pattern. Each thread includes at least one primary thread component made of spun PTFE/polyethersulfone mixed fiber yarn and at least one secondary component made of spun polyethersulfone fiber. There thread components are twisted in shaping the threads.

Abstract: The present invention is a bushing for use in a gas turbine engine. The bushing is suitable for use in a gas turbine engine. The thickness of the bushing is increased to about 0.050 inches and the life expectancy of the bushing is at least doubled.

Abstract: A slide bearing for a centrifugal pump in which the slide bearing is lubricated by the pumped medium and is composed of a stationary part disposed in the housing of the centrifugal pump and a rotatable part which is supported by the shaft of the centrifugal pump and interacts with the stationary part to give a sliding pair. One part of the sliding pair is composed of a composite material, especially carbon fibers or silicon carbide fibers in a matrix of PEEK, carbon or carbon combined with silicon carbide. The other part of the sliding pair has a sliding surface made of a hard metal material and supported by a support material. A bond produced in the molten state is formed between the hard metal material of the sliding surface and the support material which supports the sliding surface of the other part of the slide bearing. The resulting slide bearing can be used in chloride-containing and/or corrosive media and has a sliding surface that is not prone to undercutting corrosion.

Abstract: A multi-layer seal and washer that provide a seal between a vane stem and a casing in a turbine engine are disclosed. The seal and washer are fabricated from materials such as Teflon fibers and glass fibers and are impregnated with a polyimide resin. The seal and washer are durable and have a low coefficient of friction.

Abstract: A composite shim is provided having a laminate structure that includes a composite layer having at least one circumferential fiber. The composite layer may be in combination with composite layers with radially oriented fibers, uniaxially oriented fibers, and/or biaxially extending fibers. By employing such laminate structures, the present invention may provide shims that have the desired strength and stiffness characteristics of metallic shims while possessing the beneficial weight characteristics generally associated with composite shims. Laminated bearings containing such composite shims are also provided.

Abstract: An improved rolling bearing, in particular one being used in aqueous environment, such as water and steam, comprising an outer race, an inner race, rolling elements, and a retainer holding said rolling elements in a spaced relation from each other, wherein the races of the bearing are made of stellite, the rolling elements are made of hot-isostatic-pressed alumina-zirconia composites, and the retainer is made of poly-ether ether ketone comprising graphite fibers, graphite powder, and polytetrafluoroethylene.

Abstract: A bearing for supporting the drum of a clothes dryer which includes an interior structural layer of high coherency felted fibrous material and an exterior surface covering for contact with the dryer drum formed of fibrous material including a wool constituent. The felted interior provides support and noise damping character while the exterior surface covering provides friction reduction and enhanced flame retardancy.

Abstract: A wrapped slide bearing bushing consists of a composite bushing material including a metal bearing layer, a porous support layer sintered thereon, and a PTFE-based sliding layer, forming the sliding surface of an associated sliding member, said sliding layer also filling the pores of said support layer, and including at least 60 vol % of PTFE, 15-25 volume percent of a metal filler, preferably lead, and optionally 8-12 volume percent of PVDF. To obtain a low coefficient of friction, only varying in a narrow range over a long time period, said slide bearing bushing is formed such that the sliding layer includes 1-3 volume percent of carbon fibers, said carbon fibers being oriented substantially in a preferred direction relative to said composite bushing material, while the relative movement of said bearing bushing and said associated sliding member is substantially transverse to said preferred direction.

Abstract: A bearing retainer of a synthetic resin, which can be injection molded out of a material obtained by mixing at least particles of a heat resisting reins with a thermoplastic resin, and which can thereby be manufactured at a low cost without compromise in suitability for high-rotational-speed and high-temperature applications.

Abstract: A bearing structure with a low coefficient of friction and a distinguished wear resistance is obtained by coating a shaft with a resin composition comprising PAI and 5 to 50% by weight of PTFE, based on total resin composition and/or coating a bearing with a resin composition comprising PEEK and not more than 50% by weight of PTFE, based on total resin composition. By adding potassium titanate whiskers or a lead compound to the bearing resin composition, more improved coefficient of friction and wear resistance are obtained.

Abstract: Corrosion is avoided in variable stator vanes through the use of an outer trunnion bushing that eliminates the galvanic corrosion potential of conventional bushings. The bushing has a plurality of layers arranged concentrically so as to include an innermost layer and an outermost layer. The innermost layer is made of a braided graphite composite laminate material, and the outermost layer is made of a non-galvanic material.

Abstract: An inter-rotor bearing assembly includes a first annular member having a circumferential inner surface and a second annular member having a circumferential outer surface. The outer surface is concentric to and disposed radially inward of the inner surface and a bearing is disposed between the surfaces. The bearing has an outer race fixedly attached to the first annular member along the inner surface, an inner race fixedly attached to the second annular member along the outer surface, and rolling elements disposed between the races. A low density high circumferential strength support ring is fixedly attached to the first annular member disposed concentrically outside of the inner race and is preferably made of a titanium matrix composite. The rolling elements may be cylindrical rollers having cylindrical rolling surfaces. The support ring may be fixedly attached around or integral with the first annular member.

Abstract: The bearing comprises a metal backing, a sintered layer on said metal backing, and a lining layer infiltrated into pores of the sintered layer and standing proud thereof to provide a bearing surface. The lining layer comprises polytetrafluoroethylene including 2 to 10% by volume of fibrillated aramid fibers.

Abstract: A dynamic pressure type bearing comprises a sleeve rotatably holding a shaft driven by a motor composed of a rotor and a stator, one or both of the sleeve and the shaft being made of a resin material. The sleeve and/or shaft of a resin material may have a thin film of oil or grease formed on the surface thereof. Preferably, the resin material has load flexible temperture of 120.degree. C. or more, modules of elasticity or bending of 10 GPa or more, and coefficient of linear expansion of 3.times.10.sup.-5 /.degree.C. or less.

Abstract: A plastic holder for a rolling bearing is made of linear-chain polyphenylene sulfide resin, preferably with glass fiber reinforcement.

Abstract: A continuous hot dipping apparatus which comprises a slide bearing structure of a bearing and a roll shaft which is of a combination of a ceramic material and a solid lubricant material, and which has good wear resistance and long term durability. A heat resistant steel is provided, which is used in a molten metal of hot dipping and which essentially consists of 0.15-0.30% C, not more than 20% Si, not more than 2% Mn, 20-30% Cr, 10-20% Ni and not less than 50% Fe.

Abstract: A method of making a filament wound flat stock member and the filament wound flat stock member made by that method. A low fraction bearing surface is formed on a support having a flat surface by placing a self-lubricating material on the flat surface. A matrix is formed upon the self-lubricating material by winding thereon a resin-impregnated filamentous material. The winding is continued until a desired outer matrix dimension is obtained and the resin is cured to bond the materials together into a hardened stock member. The hardened stock member is removed from the flat of the support to provide a filament wound flat stock member having an exposed bearing surface of the self-lubricating material.

Abstract: A plain bearing material, e.g. for a bearing bush or a thrust washer has a composition of 45 to 60 weight percent of semiaromatic polyamide, 15 to 20 weight percent of glass fibre, 10 to 20 weight percent of graphite, 10 to 20 weight percent of polytetrafluoroethylene and up to 5 weight percent of silicon oil.

Abstract: A sliding member comprising a fluorine resin and carbon fibers treated with a fluorine-containing silane modifying agent represented by the formula R.sup.1 -SiX.sub.3 wherein R.sup.1 represents an alkyl group having from 1 to 10 carbon atoms, a part or the whole of the hydrogen atoms of which are replaced with fluorine atoms and X represents a hydrolyzable group or a chlorine atom.

Abstract: A composite ceramic structure which does not fail catastrophically and thus is useful as a ceramic rolling contact bearing assembly is disclosed. The structure is a ceramic monolith bonded through an interlayer to a fiber-reinforced ceramic body. The structure is useful at elevated temperatures.

Abstract: A rolling element bearing having balls and races, each having the surface of rolling contact coated with a laminar solid lubricant, such as molybdenum or tungsten disulfide, and a retainer made of a heat-resistant composite material having self-lubricating properties. The retainer material is composed of a polyether ether ketone resin, a polytetrafluoroethylene resin, one or both of molybdenum and tungsten disulfides, and polyamide fibers. During the initial period of its use, the bearing is lubricated by the MoS.sub.2 with which the surfaces of rolling contact are coated, and as the films of MoS.sub.2 become worn with the passage of time, the frictional contact between the balls and the retainer transfers an appropriate amount of material from the retainer to the surfaces of the balls and, further, to the track surfaces of the races to continuously form lubricating films thereon. The bearing is, therefore, not substantially worn during its use in a vacuum, or in air, but has a long life.

Abstract: A bearing with dynamic pressure grooves includes an outer cylinder made of a metal and a resin sheet bonded to the inner peripheral surface of the outer cylinder. The resin sheet is made of a thermoplastic resin, for example, a polytetra fluoroethylene, as a main component mixed with a wear-resistant improving material, for example, graphite or the like. The resin sheet is formed with a pattern of dynamic pressure generating grooves formed in an inner surface by plastic work. The pattern of grooves is varied depending on the types of relative movement between the outer cylinder and a shaft body, i.e., whether an axial linear movement, a rotational movement, or a spiral movement.

Abstract: Rolling bearing cages disclosed herein are prepared from compositions comprising an aromatic polyamide which comprises terephthalic acid constituent units, aromatic dicarboxylic acid constituent units other than terephthalic acid constituent units and straight-chain aliphatic alkylenediamine constituent units, and glass fibers, and can be easily incorporated into bearing races without damage, resultant bearings capable of being operated over a long period of time without deformation of said cages and deterioration of the lubricant oil.

Abstract: A structural element made of a castable or extrudable polymeric material reinforced by fillers, said structural element having a contact surface in sliding engagement with another element, the structural element being provided on its contact surface with a layer, thin in comparison to the structural element's dimensions, of polymeric material free of fillers, the said layer being unitary with the structural element.

Abstract: A plastic bearing is provided, as well as a method of fabricating these bearings, in which a number of strands of expanded polytetrafluoroethylene fibers are woven about a cylindrical mandrel to form a fabric about this mold surface. The fabric is then impregnated with a hardenable plastic. The plastic is hardened and the bearing is removed from the mold surface. The resulting plastic bearing has greatly improved wear resistance which permits new applications.

Abstract: In a combination of sliding members which are suitable for use in the compressor for an automotive air conditioner, one of the members consists of an aluminum alloy which contains silicone particles consisting solely of eutectic silicon; and the other sliding member consists of a fluoride resin which contains carbon fibers and a calcium compound. The surface of the aluminum alloy can be finished to a desired smoothness as it does not contain any excessively hard substance. Also, since a calcium compound which is intermediate between carbon fibers and teflon resin in hardness is distributed in the teflon resin, the tendency of the carbon fibers to attack the aluminum alloy is reduced, and the aluminum alloy can achieve a sufficient wear resistance even though it does not contain any primary crystal silicon particles having a high hardness. Furthermore, the calcium compound serves as a lubricant, and reduces friction between the two sliding members.

Abstract: In a composite material for sliding surface bearings, a rough metallic surface is provided with a polymeric matrix, which forms a friction contact or sliding layer over the rough base surface. To increase the wear resistance, the matrix contains zinc sulfide and/or barium sulfate in a particle size from 0.1 to 1.0 .mu.m and an average particle size of 0.3 .mu.m.

Abstract: In order to accommodate post-manufacturing, or secondary operations in precision assemblies using composite materials, where the secondary operations consist of drilling, machining, grinding, lapping, or other material-removing processing, without the need to resort to expensive diamond tooling and while maintaining needed structural integrity, a composite formed of a base material, a matrix, and a machineable material is provided. The matrix is bonded to the base material and the machineable material is rendered integral with the matrix and sufficiently thick to accommodate subsequent material-removing processing to a precision dimension.

Abstract: An improved laminated flexible bearing wherein alternate layers of elastomer and reinforced plastic shims of the lamination are cured simultaneously with heat and pressure and the lamination is bonded to forward and aft end rings for facilitating attachment of a thrust nozzle to a rocket case.

Abstract: A bearing has a self-lubricating liner including sheets of felted polytetrafluoroethylene fibers impregnated with cured phenolic resin having no surface bonding to the fibers. Sheets of fibrous fabric are felted to sheets of felted fibers. Sintered particles are dispersed in the low friction surface of the liner. Liners are formed by air drying resin-impregnated sheets of felted fibrous material. The resin may be cured in a heated platen press before assembly of the bearing. The bearing is assembled by deforming bearing members to form an interference fit between the members and a bearing liner disposed therebetween. Parting compound applied to one of the bearing members prevents bonding of the liner to that member when the liner is baked to cure the resin and bond the liner to the other member.Bushes and bushings having self-lubricating linings are disclosed. Arbors and mandrels form an interference fit between the linings and bushes and bushings during assembly.