Carboxylate Salt, With No Free Acid Present Patents (Class 508/539)
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Publication number: 20030036485Abstract: The present invention relates to a treatment to be used as an additive to a stock lubricant. The present invention may comprise an amount of a base fluid or other fluid, such as polybutylene, naphthenic oil, or a group III base fluid and a bismuth in a non-active sulfur. The present invention formula may further comprise one or more of a defoamer, a friction modifier, a detergent, a dispersant, and a polyol ester. Bismuth may be a particularly good sacrificial material for use as a lubricant additive because it is a heavy weight inorganic material that becomes soft at high temperatures. The preferred embodiment may utilize approximately 60% of the base fluid and approximately 30% of the bismuth in a non-active sulfur (approximately 15%-18% by weight bismuth) by volume. The treatment can be useful as a additive to a motor oil, a hydraulic lubricant, a gear lubricant, a diesel oil lubricant, or a compressor lubricant.Type: ApplicationFiled: July 17, 2002Publication date: February 20, 2003Inventor: Robert H. Sanborn
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Publication number: 20030013622Abstract: A bearing grease composition used under clean atmosphere, as in a bearing of hard disc drive, which has small dust generation (scatter), a long life, excellent acoustic performance and low torque.Type: ApplicationFiled: July 30, 2002Publication date: January 16, 2003Applicant: Minebea Co., Ltd.Inventors: Yasuhiro Miyamoto, Motoharu Akiyama, Seiji Okamura
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Publication number: 20020183213Abstract: It is an object of the invention to provide a grease composition which can improve both the acoustic performance and anti-fretting property of a ball bearing, and a rolling bearing which is lubricated by such a grease composition.Type: ApplicationFiled: March 14, 2002Publication date: December 5, 2002Inventors: Hiroshi Komiya, Atsushi Yao, Nao Ito, Youzou Taniguchi
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Publication number: 20020183214Abstract: Non-polymeric fatty acid drag reducing agents are described herein. These additives are useful to reduce drag in hydrocarbon fluids and multiphase fluids of hydrocarbon(s) and water. No injection probes or other special equipment is expected to be required to introduce the drag reducing agent into the liquid stream, nor is grinding (cryogenic or otherwise) of the additive necessary to form a suitable drag reducing agent. The drag reducing additives of the invention are not subject to shear degradation and do not cause undesirable changes in the emulsion or fluid quality of the fluid being treated, or undesirable foaming. The drag reducing additives include fatty acids, alkoxylated derivatives of fatty acids, organic and inorganic salts of fatty acids and alkoxylated derivatives thereof, and esters of fatty acids and alkoxylated derivatives thereof, and mixtures thereof.Type: ApplicationFiled: August 30, 2001Publication date: December 5, 2002Inventors: Vladimir Jovancicevic, Keith A. Bartrip
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Patent number: 6472352Abstract: A highly effective solid cold working lubricant may be deposited on a metal surface from an aqueous solution/dispersion that contains ethoxylated alcohols with at least 18 carbon atoms per alcohol and lithium, calcium, and/or sodium salts of fatty acids. Optional preferred ingredients include inorganic boron containing compounds, ethoxylated castor oil, ionomers, and a corrosion inhibitor that includes azoles. No prior conversion coating, such as is generally used under conventional organic soap lubricants, is needed with this type of solid film.Type: GrantFiled: February 28, 2001Date of Patent: October 29, 2002Assignee: Henkel CorporationInventor: Kenneth J. Hacias
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Patent number: 6448207Abstract: A metal working fluid, having excellent properties, contains a metal stearate, a carbonate, a hydrogencarbonate, and a surfactant. The metal working fluid may further contain ethyleneglycol and a rust inhibitor.Type: GrantFiled: May 2, 2001Date of Patent: September 10, 2002Assignees: Kikuko Fukutani, Mie TanakaInventors: Kikuko Fukutani, Mie Tanaka, Eiichiro Nakayama, Yoshiki Ueno, Shinya Fukushima, Kosuke Wada, Shunji Suzuki
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Patent number: 6444624Abstract: An SAE OW-30 or 5W-30 or 5W-20 lubricant has a Noack volatility of less than 15, optionally an M-111 fuel economy of 1.5% or less, and a chlorine content of less than 100 ppm. The lubricant comprises a basestock containing from 0 to less than 10% Group I and/or Group II basestocks, a molybdenum additive providing not greater than 1000 ppm of molybdenum to the lubricant, a calcium detergent providing 10 or greater mmoles of surfactant per kilogram of lubricant, one or more other additives, and a viscosity modifier.Type: GrantFiled: September 20, 2000Date of Patent: September 3, 2002Inventors: Juliet V. Walker, Ian A. Bell
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Publication number: 20020115573Abstract: A food container conveyor device having improved lubricant properties can be lubricated using a lubricant composition that can become ingested by a user from a food or a container for the food, can come into incidental contact or direct content with a food composition, can be incorporated at measurable concentrations into the food, or can be used generally on food conveyor surfaces wherein the food is exposed to the lubricant. Such lubricant compositions can be formulated in aqueous or non-aqueous compositions containing approved lubricant ingredients. Food containers lubricated using the compositions of the invention can be distributed to the public even in the substantial occurrence of contact between the food composition and the approved lubricant materials.Type: ApplicationFiled: December 15, 2000Publication date: August 22, 2002Inventors: Kim Person Hei, Minyu Li, Amy Haupert, Keith D. Lokkesmoe
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Patent number: 6436883Abstract: Provided herein are functional fluid compositions useful in hydraulic fluid and gear oil formulations. The formulations according to the invention include a predominant amount of at least one polyoxyalkylene glycol derived from the addition polymerization of an alcohol in the presence of an alkylene oxide mixture which contains a substantial amount of ethylene oxide. Fluids according to the invention exhibit suitable lubricity and stability characteristics and are generally water soluble to a degree sufficient to preclude formation of a sheen on the surface of a body of water into which a fluid according to the invention is brought into contact.Type: GrantFiled: April 6, 2001Date of Patent: August 20, 2002Assignee: Huntsman Petrochemical CorporationInventor: Edward Chung-Yit Nieh
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Patent number: 6429175Abstract: A lubricating grease composition including the combination of an oil base, a thickener, and bismuth preferably in the form of a bismuth carboxylate. The grease has excellent film strength, improved “anti-washout” capabilities, and, depending on the thickener used, may have no dropping point, meaning that the oil will not separate out at elevated temperatures.Type: GrantFiled: November 20, 2000Date of Patent: August 6, 2002Assignee: New Age Chemical, Inc.Inventors: James A. Stuart, Jr., Douglas A. Wallace
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Publication number: 20020103089Abstract: A lubricant composition for a surface treatment of a steel filament comprises at least one specified compound as a lubricant component and a rubber-steel filament composite body is prepared by using a steel filament treated with the lubricant composition.Type: ApplicationFiled: June 29, 2001Publication date: August 1, 2002Applicant: BRIDGESTONE CORPORATIONInventors: Yasuo Fukushima, Hajime Kondo
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Patent number: 6417143Abstract: Rolling bearings are proposed in which acoustic deterioration is suppressed which maintaining low dust, low torque and long life. Also, a grease for rolling bearings is proposed which is less likely to scatter under centrifugal force at high speed rotation, whereby preventing malfunction and noise of electronic information devices. A lubricating oil film of an ester-series oil having a dynamic viscosity at 40° C. of 35 mm2/s or over is formed on the friction surface of a rolling bearing. There is also provided a high-speed rolling bearing in which a lubricating grease having its worked penetration (JIS K2220) adjusted to 175-250 is retained therein. The grease is preferably prepared by adding a thickening agent containing 50 wt % or more of an aliphatic lithium salt 12-24 in carbon number to a base oil comprising 30 wt % or more of an ester oil having a dynamic viscosity at 40° C. of 10 mm2/s or over, and having its worked penetration (JIS K2220) adjusted to 175-250.Type: GrantFiled: October 28, 1999Date of Patent: July 9, 2002Assignee: NTN CorporationInventors: Hidenobu Mikami, Koya Ohira, Yoshinobu Akamatsu, Masaki Egami, Takashi Yasunishi
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Patent number: 6407043Abstract: Greases having low noise properties are prepared by cycling kettle contents, during at least the initial stage of soap-forming or other thickening, round a processing loop comprising (i) agitation and heating and (ii) shearing. Lithium complex greases are referred to which have lower noise properties than a polyurea type grease.Type: GrantFiled: October 13, 2000Date of Patent: June 18, 2002Assignee: ExxonMobil Research and Engineering CompanyInventor: Soenke Moehr
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Publication number: 20020058593Abstract: A low viscosity lubricating oil composition having a CCS viscosity less than 3500 mPa.s at −25° C. and having no more than 0.16 mass % of phosphorus which comprises a dispersant, and a detergent of calcium or magnesium or both; and optionally a zinc dihydrocarbyldithiophosphate, a viscosity modifier, a pour point depressant and an antioxidant. The oil satisfies the Cummins M11 cross-head wear engine test specification in a low phosphorus and low viscosity formulation.Type: ApplicationFiled: September 24, 2001Publication date: May 16, 2002Inventors: Charles H. Bovington, Christopher J. Locke, Terence Kelly
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Patent number: 6376433Abstract: A two- or a one-step process and composition which coats metal workpiece surfaces (aluminum, copper, steel, stainless steel, etc.) with a thin lubricant film capable of allowing the metal to be deformed at room temperature. The lubricant consists essentially of polymers, dispersants, high molecular weight waxes and insoluble metallic stearates. With some ferrous surfaces, a separate coating layer is simultaneously formed (in the one-step process) or pre-formed (in the two-step process) at the metal interface, acting as a base for the lubricant. The process, after pickling in a mineral acid to remove scale and oxides, comprises the step(s) of immersing the workpiece either once or twice. The workpiece is then dried in a heated, forced air dryer.Type: GrantFiled: July 13, 2000Date of Patent: April 23, 2002Assignee: Century Chemical CorporationInventor: Patrick J. Connor
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Patent number: 6372697Abstract: This invention concerns the use, in a cold drawing lubricating solution, as adhesive and lubricating agent, for a steel wire trimmed with brass and rubber, of an aqueous suspension comprising at least a cobalt and/or nickel salt compound of a saturated or unsaturated carboxylic acid (i), or a phosphate ester (ii), or a cobalt and/or nickel boroacylate (iii); and at least a non-ionic or anionic surfactant; the compound (i), (ii), and/or (iii)/surfactant weight ratio ranging between 0.5 and 10. The invention also concerns said suspension and preparation methods thereof. The invention further concerns a cold drawing lubricating solution comprising said suspension.Type: GrantFiled: June 28, 2000Date of Patent: April 16, 2002Assignee: Rhodia ChimieInventors: Gilles Lorentz, Hélène Lannibois-Drean
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Publication number: 20020002121Abstract: The invention provides a fluorescent grease which enables monitoring of behaviors of the grease for elucidation of the mechanism of grease lubrication, and a rolling element bearing or a condition monitoring rolling element bearing, both charged with the fluorescent grease. The fluorescent grease comprises, as its essential components, a base oil, a thickener agent, and a fluorescent substance.Type: ApplicationFiled: January 5, 2001Publication date: January 3, 2002Inventors: Motoharu Akiyama, Joichi Sugimura
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Publication number: 20010056046Abstract: Low-foam emulsifier system consisting of:Type: ApplicationFiled: July 27, 1999Publication date: December 27, 2001Inventors: JUERGEN GEKE, HORST-DIETER SPECKMANN, BERND STEDRY
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Patent number: 6333297Abstract: A constant-velocity joint for a propeller shaft is provided which can be used with good durability without adding any organic lead compound, which is high in the effect of suppressing temperature rise of grease during high-speed rotation, and which can prevent deterioration of the grease.Type: GrantFiled: December 28, 2000Date of Patent: December 25, 2001Assignee: NTN CorporationInventor: Shinichi Takabe
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Publication number: 20010044391Abstract: A lubricating oil composition comprising a zinc dithiophosphate and a zinc saturated aliphatic monocarboxylate dissolved in a base oil, wherein the zinc dithiophosphate and zinc saturated aliphatic monocarboxylate are in the ratio of equivalents from 6:1 to 45:1.Type: ApplicationFiled: February 12, 1998Publication date: November 22, 2001Inventors: MICHIO SHIGA, TAKAHIRO MURAMATSU, HIROMICHI MATSUURA
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Patent number: 6306803Abstract: Provided is a refrigerator oil, especially that for carbon dioxide refrigerant, which comprises a base oil comprising an oxygen-containing organic compound as the essential component and having a kinematic viscosity at 100° C. of from 5 to 50 mm2/sec and a viscosity index of at least 60, and optionally contains additives of, for example, extreme pressure agent and acid scavenger. The refrigerator oil can be used in compression refrigerators with carbon dioxide refrigerant therein, concretely in refrigerating or heating-cooling equipment such as car air conditioners, refrigerators, freezers, air conditioners, heat pumps, compression refrigeration cycles equipped with oil separator and/or hot gas line, etc. This is stable and has excellent lubricity (abrasion resistance) even in a supercritical carbon dioxide atmosphere, and therefore can be used for a long period of time in the atmosphere.Type: GrantFiled: November 3, 1999Date of Patent: October 23, 2001Assignee: Idemitsu Kosan Co., Ltd.Inventor: Toshinori Tazaki
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Publication number: 20010016563Abstract: A constant-velocity joint for a propeller shaft is provided which can be used with good durability without adding any organic lead compound, which is high in the effect of suppressing temperature rise of grease during high-speed rotation, and which can prevent deterioration of the grease.Type: ApplicationFiled: December 28, 2000Publication date: August 23, 2001Applicant: NTN CORPORATIONInventor: Shinichi Takabe
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Patent number: 6271182Abstract: A rolling device is made up of a plurality of rolling bodies provided between an outer member having a first contact face with each of the plurality of rolling bodies and an inner member having a second contact face with each of the plurality of rolling bodies wherein the plurality of rolling bodies individually are able to roll relative to the first and second faces. A grease composition is sealedly filled in between the outer member and the inner member and contains a carbonate compound serving as a base oil, a lithium soap serving as a thickener, and at least one organomolybdenum compound selected from the group consisting of a molybdenum dithiophosphate and a molybdenum dithiocarbamate.Type: GrantFiled: March 29, 2000Date of Patent: August 7, 2001Assignee: Minebea Co., LtdInventor: Motoharu Akiyama
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Patent number: 6265361Abstract: A grease composition with which low torque property, low noise property and low volatilization property can be maintained, is provided.Type: GrantFiled: March 2, 2000Date of Patent: July 24, 2001Assignee: Minebea Co., Ltd.Inventors: Motoharu Akiyama, Seiji Okamura, Yasuhiro Miyamoto
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Patent number: 6258762Abstract: A bearing for high efficiency electric motor with which low torque property, low noise property and low volatilization property can be maintained, is provided.Type: GrantFiled: February 23, 2000Date of Patent: July 10, 2001Assignee: Minebea Co., Ltd.Inventor: Motoharu Akiyama
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Publication number: 20010002388Abstract: An improved lubricating grease composition is herein disclosed, which comprises a base oil and a thickening agent, wherein the base oil comprises 50 to 100% by weight of a carbonate ester compound represented by the following general formula (I): 1Type: ApplicationFiled: January 22, 2001Publication date: May 31, 2001Applicant: Kyodo Yushi Co., Ltd.Inventors: Atushi Shibayama, Hiroshi Kimura, Youichiro Sugimori, Masao Yamamoto
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Patent number: 6239085Abstract: A grease of enhanced thermal stability and improved soap utilization comprises a major amount of a base oil comprising polyalphaolefin, alkyl aromatic synthetic fluid and white oil and a minor amount of soap thickener.Type: GrantFiled: October 23, 1998Date of Patent: May 29, 2001Assignee: Exxon Research and Engineering CompanyInventor: David Anthony Slack
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Patent number: 6232278Abstract: A lubricating grease composition comprises a base oil and a thickening agent, wherein the thickening agent comprises (a) a lithium salt of hydroxystearic acid and (b) a lithium salt of a C6 to C14 fatty acid. The grease composition is useful for the improvement of the acoustic characteristics of bearings, in particular, the reduction of noise and the elongation of the service life of the bearings. Accordingly, the grease composition can be used for lubricating bearings, in particular, those used in spindle motors for the operation of recording devices such as those for computer hard disks and CD-ROM's.Type: GrantFiled: December 21, 1999Date of Patent: May 15, 2001Assignee: Kyodo Yushi Co., Ltd.Inventors: Atsushi Shibayama, Hiroshi Kimura
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Patent number: 6214777Abstract: A lubricant composition comprising a lubricating agent and a quaternary phosphonium compound is useful as a conveyor, container or beverage lubricant.Type: GrantFiled: September 24, 1999Date of Patent: April 10, 2001Assignee: Ecolab, Inc.Inventors: Minyu Li, Kim L. Person-Hei, Bruce R. Cords, Keith D. Lokkesmoe, Joy G. Herdt
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Patent number: 6214778Abstract: A grease composition comprising a major amount of an oil of lubricating viscosity; a thickener selected from the group consisting of monoureas, diureas, triureas and polyureas, or mixtures thereof; and an oil soluble neutral or overbased zinc salt of a carboxylic acid selected from the group consisting of zinc salts of fatty acids, the zinc salts of hydrocarbyl-substituted salicylic acids, and zinc glyoxylates is disclosed.Type: GrantFiled: August 8, 2000Date of Patent: April 10, 2001Assignee: The Lubrizol CorporationInventor: Patricia R. Todd
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Patent number: 6194357Abstract: Waterborne lubricants comprising: (A) water-soluble inorganic salt; (B) homogeneously dispersed solid lubricant; (C) at least one homogeneously emulsified substance selected from mineral oils, animal and plant oils and fats, and synthetic oils; (D) surfactant; and (E) water, in which the weight ratio (B)/(A) is from 0.05:1 to 2:1 and the weight ratio {C/(A+B)} is from 0.05:1 to 1:1, provide a one-step, highly lubricating waterborne lubricant for use in the cold plastic working of metals. This waterborne lubricant can replace the conversion coating treatment (phosphate, oxalate, etc.)+reactive soap treatment combined lubrication system now in general use and is free of the environmental issues associated with the combined lubrication system, provides for facile coating removal, and is not subject to the decline in seizure resistance caused by nonuniform add-on when large numbers of workpieces are treated together by immersion.Type: GrantFiled: December 21, 1998Date of Patent: February 27, 2001Assignee: Henkel CorporationInventors: Motoharu Murata, Yoshio Matsumura, Yoshihiko Nishizawa, Takashi Koyama
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Patent number: 6156709Abstract: Lubricating oil compositions containing a medium molecular weight paraffin (MMWP) which is effective in improving the lubricant properties of an engine oil. The medium molecular weight paraffins disclosed include those having from between 10 to 20 carbon atoms. Compositions containing from 0.1% to 2% by volume of the engine oil are disclosed. The MMWP reduces varnishing, sludging, production of chemical byproducts and glazing. It also improves seal life and extends the life of lubricating oil compositions containing it.Type: GrantFiled: April 9, 1997Date of Patent: December 5, 2000Inventor: Pieter Jan Dirk Muntz
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Patent number: 6153563Abstract: A sealed pouch of a single layer polyolefin film having a thickness of from about 0.005 to 0.001 inch and a melting point below about 280.degree. F. which is soluble in a lubricating oil base. The pouch contains a solid lithium hydroxide or lithium fatty acid salt or mixtures thereof for use in preparing greases.Type: GrantFiled: November 10, 1999Date of Patent: November 28, 2000Assignee: Lithchem InternationalInventors: W. Novis Smith, Joel McCloskey, Andrew Atterbury
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Patent number: 6107260Abstract: Lubricants are provided which are aluminium or aluminium alloy plate moulding lubricants, and are lubricants which are easily removed after moulding of aluminium or aluminium alloy plate and assembly; also, bonding and welding can be performed while coated with those lubricants, and the bonding and weld strength obtained are the same as if there were no adhering lubricant. Their main constituents are a polyalkylene oxide or derivative thereof and a higher fatty acid salt. It is preferable if they contain 50 to 2 weight % polyalkylene oxide or derivative thereof, and the ratio of higher fatty acid salt and polyalkylene oxide or derivative thereof is within the range 1/12 to 1/4, and further that they contain water. When these lubricants are formed into a 0.2-2.0 g/m.sup.2 solid film on the surface of the aluminium or aluminium alloy plate, this is suitable for moulding processes.Type: GrantFiled: September 16, 1996Date of Patent: August 22, 2000Assignees: Castrol Kabushiki Kaisha, Shinkou Alcoa Yusoukizai Kabushiki KaishaInventors: Tomoyuki Sugita, Kuniaki Matsui, Hideya Watada
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Patent number: 6056072Abstract: A heavy-duty lubricating grease is shown which includes a synthetic fluid base and a thickener system. The heavy-duty grease can be used in both rolling element and journal type rock bit bearings to drill in heavy-duty, high temperature applications, such as in the bearing structures of rock bits used to drill hot subterranean formations.Type: GrantFiled: November 2, 1998Date of Patent: May 2, 2000Assignee: Baker Hughes Inc.Inventors: Terry J. Koltermann, Thomas F. Willey
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Patent number: 6004911Abstract: Work W to which oil has adhered is heated in the heating furnace 28 and adhering oil is evaporated. Gas containing the evaporated oil component is burned in the combustor 35. A portion of the generated combustion gas is circulated into the heating furnace 28 through the circulating duct 38, and an amount of the circulating combustion gas is controlled in accordance with a temperature in the heating furnace 28. Processing of aluminum materials is carried out using a base oil of hydrocarbon, the maximum molecular weight M of which is not less than 282 and not more than 378, and an additive of not less than 3% by weight of alcohol or carboxylic acid, the maximum molecular weight M of which is not more than 378.Type: GrantFiled: December 27, 1996Date of Patent: December 21, 1999Assignee: Denso CorporationInventors: Satoshi Nohira, Takashi Ando, Shinya Nishihata, Haruhiko Matsushita
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Patent number: 5994277Abstract: Crankcase lubricant compositions for use in automobile or truck engines comprise a major amount of a lubricating oil, added copper present in oil-soluble form, at least 2 ppm of molybdenum present in oil-soluble form, and a total of from 0.05 to 2 mass % of one or more oil-soluble aromatic amines. The specified additives provide a highly effective antioxidant system.Type: GrantFiled: April 3, 1996Date of Patent: November 30, 1999Assignee: Exxon Chemical Patents, Inc.Inventors: Andrew J. D. Ritchie, Harold Shaub, Ian P. Field
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Patent number: 5965498Abstract: A two-cycle oil composition comprising: (a) 10-20% of a first synthetic ester base stock oil (a copolymer of an alpha-olefin with an ester of a dicarboxylic acid, viscosity 20 to 50 cSt at 100.degree. C.); (b) 18-30% of a second synthetic ester base stock oil (an oxo alcohol of a dicarboxylic acid, viscosity 3 to 10 cSt at 100.degree. C.; (c) 30-40% of a polybutene polymer (Mn 300-1500); (d) 15-25% of a nor liquid solvent (boiling point up to 300.degree. C., flash point of 60 .degree.-120.degree. C.); (e) 0.2 to 2.0% of an oil soluble copper compound, and (f) 0 to 5% of other lubricating oil additives.Type: GrantFiled: May 14, 1998Date of Patent: October 12, 1999Assignee: Exxon Chemical Patents IncInventor: John Henry Smythe
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Patent number: 5898022Abstract: A light-duty, multi-purpose lubricant particularly formulated for use on the diverse bearing surfaces mechanisms which operate in a dirty or dusty environment, such as bicycle chains. The lubricant comprises an insoluble bond weakening agent, preferably metallic soaps such as Calcium Stearate, in suspension in a volatile solvent-based solution of wax and oil. After application and evaporation of the solvent the composite dry lubricant exhibits good penetration and load bearing properties without the dirt-retaining character of oils or greases. The undissolved particles of the bond weakening agent combine with dirt particles to break-down portions of the lubricant into a dry flaky particles which are sloughed off the mechanism. Soluble waxes having different solid phase crystalline structures may be blended with the paraffin to reduce the rate of sloughing. The amount of solvent may be adjusted or eliminated depending on the application. A surfactant can be added provide for coating wet mechanisms.Type: GrantFiled: June 19, 1996Date of Patent: April 27, 1999Inventor: Paul D. Maples
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Patent number: 5891830Abstract: A heavy-duty lubricating grease is shown which includes a synthetic fluid base and a thickener system. The heavy-duty grease can be used in both rolling element and journal type rock bit bearings to drill in heavy-duty, high temperature applications, such as in the bearing structures of rock bits used to drill hot subterranean formations.Type: GrantFiled: January 31, 1997Date of Patent: April 6, 1999Assignee: Baker Hughes IncorporatedInventors: Terry J. Koltermann, Thomas F. Willey
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Patent number: 5885947Abstract: A light-duty, multi-purpose lubricant particularly formulated for use on the, diverse bearing surfaces mechanisms which operate in a dirty or dusty environment, such as bicycle chains. The lubricant comprises an insoluble soap, preferably Calcium Stearate in suspension in a volatile solvent-based solution of paraffin wax, petrolatum and a surfactant. After application and evaporation of the solvent the composite dry lubricant exhibits good penetration and load bearing properties without the dirt-retaining character of greases. The optional surfactant is surrounded and deactivated by the other components so that the dried lubricant is water repelling. The undissolved particles of soap combine with dirt particles to break-down portions of the lubricant into a dry flaky dust which is sloughed off the mechanism. Soluble waxes having different solid phase crystalline structures may be blended with the paraffin to reduce the rate of sloughing.Type: GrantFiled: December 23, 1996Date of Patent: March 23, 1999Inventor: Paul D. Maples
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Patent number: 5865884Abstract: A glass forming lubricant comprising an organic titanate or an organic phospherous ester calcium salt as a lubricant agent.Type: GrantFiled: May 1, 1997Date of Patent: February 2, 1999Assignees: Asahi Glass Company Ltd., Chukyo Kasei Kogyo Co., Ltd.Inventors: Yutaka Segawa, Yukio Morisawa, Ryoji Nishizawa, Norio Doi
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Patent number: 5856281Abstract: Gas contaminants generated from the grease of bearings operating in a magnetic disk device adhere to the magnetic head and causing stiction and magnetic head crash. Such bearings are typically spindle bearings and pivot bearings. In operation, heat is generated that causes the bearing grease to generate the gases. By heat treating the grease, slow evaporating substances of hydrocarbon compounds with carbons of C9 to C13 in the grease are reduced to not more than 0.001 wt. % of the grease. The grease can then be used to lubricate the bearings. The heat treatment is performed at a temperature of 60.degree. to 100.degree. C. at a pressure of 10.sup.-3 to 10.sup.-8 torr. The assembled, lubricated bearings can be heat treated separately from the magnetic disk device or the heat treatment can take place after the bearings have been assembled in the magnetic disk device.Type: GrantFiled: December 18, 1996Date of Patent: January 5, 1999Assignee: Hitachi, Ltd.Inventors: Masaki Otsuka, Iwao Matsuyama, Mitsuhiko Oguchi, Kazuhisa Murakami, Nobuyuki Ishii, Masayuki Katsumoto, Tsuneyuki Hasegawa, Satomi Yamaguchi
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Patent number: 5836417Abstract: A fluid power vehicle steering gear (10) comprises a tubular housing (22), a fluid (34) disposed within the tubular housing, and a member (20) movable relative to the housing in response to a change in the fluid pressure in the housing. The fluid comprises a mixture of a base oil and a grease. The weight of the grease in the mixture is about 0.1% to about 5% of the weight of the base oil in the mixture.Type: GrantFiled: January 2, 1996Date of Patent: November 17, 1998Assignee: TRW Inc.Inventor: Jon W. Martin
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Patent number: 5800731Abstract: Homogeneous, electro-viscous fluids are provided which contain aluminum soaps based on products obtained by reacting one or more mono- or polycarboxylic acid(s) or the anhydrides or semi-esters thereof with reactive aluminum compounds, such as aluminum alcoholates. The aforesaid fluids manifest high electro-rheological effect and are completely homogeneous, and do not require a dispersant.Type: GrantFiled: June 11, 1996Date of Patent: September 1, 1998Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und ChemieInventors: Dietrich Pirck, Hans-Dieter Grasshoff, Harald Kohnz, Peter Finmans, Tobias Carstensen, Dieter Jakubik, Wilfried Weber, Dieter Winkler
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Patent number: 5786307Abstract: A lubricating oil composition useful for internal combustion engines comprises a base oil, and, as combined therewith, specified amounts of a molybdenum dialkyl-dithiocarbamate, a selected zinc dihydrocarbyl dithiophosphate and a selected copper carboxylate, respectively. The oil composition exhibits a high friction-reducing effect when the oil is fresh and maintains the same effect even after the oil has been deteriorated.Type: GrantFiled: October 23, 1996Date of Patent: July 28, 1998Assignee: Nippon Oil Co., Ltd.Inventors: Jinich Igarashi, Kazuhiro Yagishita, Kiyoshi Azami
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Patent number: 5714444Abstract: A grease composition comprising a base oil and a thickener, in which the thickener comprises a lithium soap of C.sub.12 -C.sub.24 fatty acid containing no hydroxyl group and a lithium soap of C.sub.12 -C.sub.24 fatty acid containing a hydroxyl group and the base oil has kinematic viscosity of 25 to 200 mm.sup.2 /sec at 40.degree. C. and contains 10 to 70% by weight of an ester oil, the grease composition containing from 20 to 30% by weight of the two specific thickeners. Prolonged continuous operation of bearings into which the grease composition is sealed does not cause an amount of splashing grease to increase and noiseless property to be deteriorated.Type: GrantFiled: November 17, 1995Date of Patent: February 3, 1998Assignee: NSK Ltd.Inventors: Atsushi Yokouchi, Masao Yamamoto, Atsuhiro Yamamoto, Michiharu Naka
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Patent number: 5700767Abstract: A downhole well lubricant includes at least about 50#/bbl of a surfactant, preferably at least about 10#/bbl of a viscosifier, the balance being about 20-50% filming amine, 20-80% activator, balance being a diluent. The activator is VARSOL, coconut oil, terpene, xylene, mineral oil, turpentine, d-limonene and mixtures thereof. The surfactant is a stearate, preferably aluminum stearate, and the viscosifier is an oil compatible bentonite or polyacrylamide polymer. The resultant product is a thin pigmented solution of low viscosity. When the lubricant is dispersed in a water based drilling or completion fluid, the filming amine is attracted to and coats metal in the well. When the metal rubs against anything, such as coiled tubing rubbing against the side of the production string, a lubricious emulsion is created on the metal at locations where it is rubbing against something.Type: GrantFiled: September 21, 1995Date of Patent: December 23, 1997Assignee: CJD Investments, Inc.Inventor: Ernest K. Adams
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Patent number: 5688751Abstract: Two-stroke cycle engines can be effectively lubricated by supplying to the engine a mixture of an oil of lubricating viscosity and a hydrocarbyl-substituted hydroxyaromatic carboxylic acid or an ester, unsubstituted amide, hydrocarbyl-substituted amide, ammonium salt, hydrocarbylamine salt, or monovalent metal salt thereof in an amount suitable to reduce piston deposits in said engine. The mixture supplied to the engine contains less than 0.06 percent by weight of divalent metals.Type: GrantFiled: August 14, 1996Date of Patent: November 18, 1997Assignee: The Lubrizol CorporationInventors: William K. S. Cleveland, Jack L. Karn, Daniel M. Vargo
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Patent number: 5672571Abstract: A grease composition for constant velocity joints comprises (a) a base oil; (b) a lithium-containing thickener selected from the group consisting of lithium soap and lithium complex soap; (c) an organic molybdenum compound selected from the group consisting of molybdenum dithiophosphates and molybdenum dithiocarbamates; (d) a zinc dithiophosphate; (e) a sulfur-phosphorus extreme pressure agent free of any metal; and (f) a calcium salt selected from the group consisting of calcium salts of oxidized waxes, calcium salts of petroleum sulfonates and calcium salts of alkyl aromatic sulfonates. The grease composition for constant velocity joints exhibits a substantially improved effect of reducing friction coefficient and a substantially improved effect of reducing the axial force proportional to the third order component of rotation.Type: GrantFiled: January 27, 1995Date of Patent: September 30, 1997Assignee: Kyodo Yushi Co., Ltd.Inventors: Ko Hatakeyama, Shinya Kondo