Carboxylate Salt, With No Free Acid Present Patents (Class 508/539)
  • Publication number: 20030036485
    Abstract: 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: Application
    Filed: July 17, 2002
    Publication date: February 20, 2003
    Inventor: Robert H. Sanborn
  • Publication number: 20030013622
    Abstract: 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: Application
    Filed: July 30, 2002
    Publication date: January 16, 2003
    Applicant: Minebea Co., Ltd.
    Inventors: Yasuhiro Miyamoto, Motoharu Akiyama, Seiji Okamura
  • Publication number: 20020183213
    Abstract: 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: Application
    Filed: March 14, 2002
    Publication date: December 5, 2002
    Inventors: Hiroshi Komiya, Atsushi Yao, Nao Ito, Youzou Taniguchi
  • Publication number: 20020183214
    Abstract: 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: Application
    Filed: August 30, 2001
    Publication date: December 5, 2002
    Inventors: Vladimir Jovancicevic, Keith A. Bartrip
  • Patent number: 6472352
    Abstract: 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: Grant
    Filed: February 28, 2001
    Date of Patent: October 29, 2002
    Assignee: Henkel Corporation
    Inventor: Kenneth J. Hacias
  • Patent number: 6448207
    Abstract: 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: Grant
    Filed: May 2, 2001
    Date of Patent: September 10, 2002
    Assignees: Kikuko Fukutani, Mie Tanaka
    Inventors: Kikuko Fukutani, Mie Tanaka, Eiichiro Nakayama, Yoshiki Ueno, Shinya Fukushima, Kosuke Wada, Shunji Suzuki
  • Patent number: 6444624
    Abstract: 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: Grant
    Filed: September 20, 2000
    Date of Patent: September 3, 2002
    Inventors: Juliet V. Walker, Ian A. Bell
  • Publication number: 20020115573
    Abstract: 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: Application
    Filed: December 15, 2000
    Publication date: August 22, 2002
    Inventors: Kim Person Hei, Minyu Li, Amy Haupert, Keith D. Lokkesmoe
  • Patent number: 6436883
    Abstract: 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: Grant
    Filed: April 6, 2001
    Date of Patent: August 20, 2002
    Assignee: Huntsman Petrochemical Corporation
    Inventor: Edward Chung-Yit Nieh
  • Patent number: 6429175
    Abstract: 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: Grant
    Filed: November 20, 2000
    Date of Patent: August 6, 2002
    Assignee: New Age Chemical, Inc.
    Inventors: James A. Stuart, Jr., Douglas A. Wallace
  • Publication number: 20020103089
    Abstract: 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: Application
    Filed: June 29, 2001
    Publication date: August 1, 2002
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yasuo Fukushima, Hajime Kondo
  • Patent number: 6417143
    Abstract: 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: Grant
    Filed: October 28, 1999
    Date of Patent: July 9, 2002
    Assignee: NTN Corporation
    Inventors: Hidenobu Mikami, Koya Ohira, Yoshinobu Akamatsu, Masaki Egami, Takashi Yasunishi
  • Patent number: 6407043
    Abstract: 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: Grant
    Filed: October 13, 2000
    Date of Patent: June 18, 2002
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: Soenke Moehr
  • Publication number: 20020058593
    Abstract: 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: Application
    Filed: September 24, 2001
    Publication date: May 16, 2002
    Inventors: Charles H. Bovington, Christopher J. Locke, Terence Kelly
  • Patent number: 6376433
    Abstract: 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: Grant
    Filed: July 13, 2000
    Date of Patent: April 23, 2002
    Assignee: Century Chemical Corporation
    Inventor: Patrick J. Connor
  • Patent number: 6372697
    Abstract: 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: Grant
    Filed: June 28, 2000
    Date of Patent: April 16, 2002
    Assignee: Rhodia Chimie
    Inventors: Gilles Lorentz, Hélène Lannibois-Drean
  • Publication number: 20020002121
    Abstract: 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: Application
    Filed: January 5, 2001
    Publication date: January 3, 2002
    Inventors: Motoharu Akiyama, Joichi Sugimura
  • Publication number: 20010056046
    Abstract: Low-foam emulsifier system consisting of:
    Type: Application
    Filed: July 27, 1999
    Publication date: December 27, 2001
    Inventors: JUERGEN GEKE, HORST-DIETER SPECKMANN, BERND STEDRY
  • Patent number: 6333297
    Abstract: 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: Grant
    Filed: December 28, 2000
    Date of Patent: December 25, 2001
    Assignee: NTN Corporation
    Inventor: Shinichi Takabe
  • Publication number: 20010044391
    Abstract: 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: Application
    Filed: February 12, 1998
    Publication date: November 22, 2001
    Inventors: MICHIO SHIGA, TAKAHIRO MURAMATSU, HIROMICHI MATSUURA
  • Patent number: 6306803
    Abstract: 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: Grant
    Filed: November 3, 1999
    Date of Patent: October 23, 2001
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventor: Toshinori Tazaki
  • Publication number: 20010016563
    Abstract: 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: Application
    Filed: December 28, 2000
    Publication date: August 23, 2001
    Applicant: NTN CORPORATION
    Inventor: Shinichi Takabe
  • Patent number: 6271182
    Abstract: 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: Grant
    Filed: March 29, 2000
    Date of Patent: August 7, 2001
    Assignee: Minebea Co., Ltd
    Inventor: Motoharu Akiyama
  • Patent number: 6265361
    Abstract: A grease composition with which low torque property, low noise property and low volatilization property can be maintained, is provided.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: July 24, 2001
    Assignee: Minebea Co., Ltd.
    Inventors: Motoharu Akiyama, Seiji Okamura, Yasuhiro Miyamoto
  • Patent number: 6258762
    Abstract: 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: Grant
    Filed: February 23, 2000
    Date of Patent: July 10, 2001
    Assignee: Minebea Co., Ltd.
    Inventor: Motoharu Akiyama
  • Publication number: 20010002388
    Abstract: 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): 1
    Type: Application
    Filed: January 22, 2001
    Publication date: May 31, 2001
    Applicant: Kyodo Yushi Co., Ltd.
    Inventors: Atushi Shibayama, Hiroshi Kimura, Youichiro Sugimori, Masao Yamamoto
  • Patent number: 6239085
    Abstract: 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: Grant
    Filed: October 23, 1998
    Date of Patent: May 29, 2001
    Assignee: Exxon Research and Engineering Company
    Inventor: David Anthony Slack
  • Patent number: 6232278
    Abstract: 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: Grant
    Filed: December 21, 1999
    Date of Patent: May 15, 2001
    Assignee: Kyodo Yushi Co., Ltd.
    Inventors: Atsushi Shibayama, Hiroshi Kimura
  • Patent number: 6214777
    Abstract: A lubricant composition comprising a lubricating agent and a quaternary phosphonium compound is useful as a conveyor, container or beverage lubricant.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: April 10, 2001
    Assignee: Ecolab, Inc.
    Inventors: Minyu Li, Kim L. Person-Hei, Bruce R. Cords, Keith D. Lokkesmoe, Joy G. Herdt
  • Patent number: 6214778
    Abstract: 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: Grant
    Filed: August 8, 2000
    Date of Patent: April 10, 2001
    Assignee: The Lubrizol Corporation
    Inventor: Patricia R. Todd
  • Patent number: 6194357
    Abstract: 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: Grant
    Filed: December 21, 1998
    Date of Patent: February 27, 2001
    Assignee: Henkel Corporation
    Inventors: Motoharu Murata, Yoshio Matsumura, Yoshihiko Nishizawa, Takashi Koyama
  • Patent number: 6156709
    Abstract: 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: Grant
    Filed: April 9, 1997
    Date of Patent: December 5, 2000
    Inventor: Pieter Jan Dirk Muntz
  • Patent number: 6153563
    Abstract: 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: Grant
    Filed: November 10, 1999
    Date of Patent: November 28, 2000
    Assignee: Lithchem International
    Inventors: W. Novis Smith, Joel McCloskey, Andrew Atterbury
  • Patent number: 6107260
    Abstract: 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: Grant
    Filed: September 16, 1996
    Date of Patent: August 22, 2000
    Assignees: Castrol Kabushiki Kaisha, Shinkou Alcoa Yusoukizai Kabushiki Kaisha
    Inventors: Tomoyuki Sugita, Kuniaki Matsui, Hideya Watada
  • Patent number: 6056072
    Abstract: 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: Grant
    Filed: November 2, 1998
    Date of Patent: May 2, 2000
    Assignee: Baker Hughes Inc.
    Inventors: Terry J. Koltermann, Thomas F. Willey
  • Patent number: 6004911
    Abstract: 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: Grant
    Filed: December 27, 1996
    Date of Patent: December 21, 1999
    Assignee: Denso Corporation
    Inventors: Satoshi Nohira, Takashi Ando, Shinya Nishihata, Haruhiko Matsushita
  • Patent number: 5994277
    Abstract: 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: Grant
    Filed: April 3, 1996
    Date of Patent: November 30, 1999
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Andrew J. D. Ritchie, Harold Shaub, Ian P. Field
  • Patent number: 5965498
    Abstract: 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: Grant
    Filed: May 14, 1998
    Date of Patent: October 12, 1999
    Assignee: Exxon Chemical Patents Inc
    Inventor: John Henry Smythe
  • Patent number: 5898022
    Abstract: 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: Grant
    Filed: June 19, 1996
    Date of Patent: April 27, 1999
    Inventor: Paul D. Maples
  • Patent number: 5891830
    Abstract: 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: Grant
    Filed: January 31, 1997
    Date of Patent: April 6, 1999
    Assignee: Baker Hughes Incorporated
    Inventors: Terry J. Koltermann, Thomas F. Willey
  • Patent number: 5885947
    Abstract: 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: Grant
    Filed: December 23, 1996
    Date of Patent: March 23, 1999
    Inventor: Paul D. Maples
  • Patent number: 5865884
    Abstract: A glass forming lubricant comprising an organic titanate or an organic phospherous ester calcium salt as a lubricant agent.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: February 2, 1999
    Assignees: Asahi Glass Company Ltd., Chukyo Kasei Kogyo Co., Ltd.
    Inventors: Yutaka Segawa, Yukio Morisawa, Ryoji Nishizawa, Norio Doi
  • Patent number: 5856281
    Abstract: 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: Grant
    Filed: December 18, 1996
    Date of Patent: January 5, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Masaki Otsuka, Iwao Matsuyama, Mitsuhiko Oguchi, Kazuhisa Murakami, Nobuyuki Ishii, Masayuki Katsumoto, Tsuneyuki Hasegawa, Satomi Yamaguchi
  • Patent number: 5836417
    Abstract: 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: Grant
    Filed: January 2, 1996
    Date of Patent: November 17, 1998
    Assignee: TRW Inc.
    Inventor: Jon W. Martin
  • Patent number: 5800731
    Abstract: 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: Grant
    Filed: June 11, 1996
    Date of Patent: September 1, 1998
    Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
    Inventors: Dietrich Pirck, Hans-Dieter Grasshoff, Harald Kohnz, Peter Finmans, Tobias Carstensen, Dieter Jakubik, Wilfried Weber, Dieter Winkler
  • Patent number: 5786307
    Abstract: 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: Grant
    Filed: October 23, 1996
    Date of Patent: July 28, 1998
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Jinich Igarashi, Kazuhiro Yagishita, Kiyoshi Azami
  • Patent number: 5714444
    Abstract: 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: Grant
    Filed: November 17, 1995
    Date of Patent: February 3, 1998
    Assignee: NSK Ltd.
    Inventors: Atsushi Yokouchi, Masao Yamamoto, Atsuhiro Yamamoto, Michiharu Naka
  • Patent number: 5700767
    Abstract: 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: Grant
    Filed: September 21, 1995
    Date of Patent: December 23, 1997
    Assignee: CJD Investments, Inc.
    Inventor: Ernest K. Adams
  • Patent number: 5688751
    Abstract: 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: Grant
    Filed: August 14, 1996
    Date of Patent: November 18, 1997
    Assignee: The Lubrizol Corporation
    Inventors: William K. S. Cleveland, Jack L. Karn, Daniel M. Vargo
  • Patent number: 5672571
    Abstract: 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: Grant
    Filed: January 27, 1995
    Date of Patent: September 30, 1997
    Assignee: Kyodo Yushi Co., Ltd.
    Inventors: Ko Hatakeyama, Shinya Kondo