Patents Examined by Jacqueline V. Howard
  • Patent number: 6656890
    Abstract: A lubricating grease composed of a base oil combination comprising 10 to 35% of one or more poly &agr;-olefins, 3 to 15% of one or more synthetic organic esters, 20 to 30% of one or more naphthenic oils, the remainder of the combination being one or more paraffinic oils, the percentages being by weight of the total base oil combination and the ratio of the weight of the ester(s) in the combination to the weight of the poly &agr;-olefin(s) therein being not greater than 1:3; between 2 and 15 % by weight of the total grease of a lithium soap thickener, between 1 and 5% by weight of the total grease of a molybdenum dithiophospbate; between 1 and 5% by weight of the total grease of a zinc dialkyldithiophosphate; between 1 and 5% by weight of the total grease of a sulphur-free friction modifier, and some or all of the normal grease additives such as anti-oxidants, corrosion inhibitors, extreme pressure additives and tackiness agents.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: December 2, 2003
    Assignee: GKN Automotive GmbH
    Inventors: Gareth Fish, Jennifer Sarah Cooper, Jisheng E, Trevor David Davies, Gareth Robert Isaac
  • Patent number: 6653261
    Abstract: A high speed rolling bearing having a long life, low rotation torque and small leakage amount of a grease, is provided. The high speed rolling bearing is made up of retainers disposed so as to surround respective rolling elements between an outer member and an inner member thereof, and the respective rolling elements roll against a first contact face which is a contact face thereof with the outer member as well as a second contact face which is a contact face thereof with the inner member. The retainers are made of a polyamide and retain a grease composition composed of a thickener and a base oil composed of a synthetic hydrocarbon oil having a kinematic viscosity at 40° C. in a range of 50 to 70 mm2/s and containing 3 to 6 mass % of hydrocarbon molecules containing 28 to 32 carbon atoms.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: November 25, 2003
    Assignee: Minebea Co., Ltd.
    Inventor: Motoharu Akiyama
  • Patent number: 6653263
    Abstract: The invention relates to the use of formulations containing selected fluorinated components for reducing friction between conveyor systems and the containers transported thereon.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: November 25, 2003
    Assignee: Ecolab Inc.
    Inventors: Stefan Küpper, Michael Schneider, Walter Grosse Böwing, Alfred Laufenberg, Harald Kluschanzoff
  • Patent number: 6649573
    Abstract: A solid lubricant and composition useful for lubricating the flanges of locomotive wheels, railcar wheels, rail track and in applications where it is desirable to reduce friction when metal contacts metal. The solid lubricant having from about twenty-five percent to about seventy percent by volume of a polymeric carrier, about five to seventy-five percent by volume of organic and inorganic extreme pressure additives, about zero to twenty percent by volume synthetic extreme pressure anti-wear liquid oil, and about zero to one percent by volume optical brightener.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: November 18, 2003
    Inventor: Michael J. Mitrovich
  • Patent number: 6649574
    Abstract: A biodegradable lubricating oil composition especially useful as a gear oil employs a synthetic alcohol ester basestock formed from mono- and dipentaerythritol with certain mono- and dicarboxylic acids or dicarboxylic acid anhydrides and an effective amount of a polyoxyalkylene alcohol demulsifying agent, a combination of alkylated organic acid and ashless succinimide rust inhibitors and an ashless dithiocarbamate antiwear and extreme pressure agent.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: November 18, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Angeline Baird Cardis, Susan Ardito
  • Patent number: 6649576
    Abstract: A crankcase lubricant containing a Group III basestock in a major amount and a Group V basestock in the form of an ester in a minor amount. The lubricant also comprises a dispersant, a metal detergent, one or more other additives, and a viscosity modifier.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: November 18, 2003
    Assignee: Infineum International Inc.
    Inventors: Ian A. W. Bell, Robert Robson
  • Patent number: 6649575
    Abstract: A low-phosphorus lubricant comprises: an oil of lubricating viscosity; a nitrogen-containing and a nitrogen-free dispersant; a metal dihydrocarbyl dithiophosphate; and a hydrocarbyl-substituted carboxylic acid derivative, the ratio of the dispersants being such as to provide suitable fluoroelastomer seal compatibility.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: November 18, 2003
    Assignee: Infineum International Ltd.
    Inventor: Robert Robson
  • Patent number: 6645923
    Abstract: A gas-fuelled engine lubricating oil composition having a TBN in the range of 2 to 20 and comprising: (A) oil of lubricating viscosity; (B) a salicylate detergent having a TBN of 95 or less; (C) a detergent having a TBN of greater than 250; (D) an ashless dispersant; and (E) an anti-wear additive.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: November 11, 2003
    Assignee: Infineum International Ltd.
    Inventors: Adrian Dunn, Laurent Chambard, Terence Garner
  • Patent number: 6645922
    Abstract: A lubricating oil composition suitable for a two-stroke cross-head marine diesel engine. The lubricating oil composition comprises a base oil and an oil-soluble overbased metal detergent additive in the form of a complex wherein the basic material of the detergent is stabilized by more than one surfactant.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: November 11, 2003
    Assignee: Infineum International Ltd.
    Inventors: Adrian Dunn, Laurent Chambard, Yolanda Owen
  • Patent number: 6645920
    Abstract: A lubricating oil composition containing in oxidation inhibitor package, a rust inhibitor and metal deactivator is used in industrial fluids. The oxidation package contains alkylated diphenylamines, substituted hydrocarbyl monosulphides and optionally sterically hindered phenols. The rust inhibitor contains at least 1 of alkylated amine salts of alkylphosphoric acid, dialkyldithiophosphoric acid or hydrocarbyl aryl sulphonic acids. The metal deactivator is 5-methylbenzotriazole.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: November 11, 2003
    Assignee: The Lubrizol Corporation
    Inventor: Betsy J. Butke
  • Patent number: 6642188
    Abstract: The lubricating compositions of the present invention are designed for use in a four stroke outboard marine engine and contain an oil of lubricating viscosity, an ashless dispersant, a metal detergent, a rust inhibitor, a relatively high amount of ZDDP, and an amount of a molybdenum compound sufficient to provide the composition with 15-1,000 ppm by mass of molybdenum. An amount of about 15 ppm to 1,000 ppm by mass of molybdenum from a molybdenum compound has been found to be effective as an antiwear agent in combination with the high levels of ZDDP.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: November 4, 2003
    Assignee: Infineum International Ltd.
    Inventors: Rolfe J. Hartley, Salvatore Rea, Malcolm Waddoups
  • Patent number: 6642191
    Abstract: A lubricating oil comprising a major amount of at least one of Group II, III, and IV base oil and a minor amount of 3,5-di-t-butyl 4-hydroxy phenol propionate. A method of making this lubricating oil and a method of lubricating a natural gas engine with this lubricating oil.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: November 4, 2003
    Assignee: Chevron Oronite Company LLC
    Inventors: John D. Palazzotto, Mark R. Logan
  • Patent number: 6638897
    Abstract: The lubricating oil of the present invention exhibits an excellent effect of agglomerating solid impurity particles it contains to a sufficiently large size as to be captured and removed by an oil filter.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: October 28, 2003
    Assignee: TonenGeneral Sekiyu K.K.
    Inventors: Satoshi Ogano, Nobuchika Kawagoishi, Makota Yoneda, Toshiaki Kuribayashi
  • Patent number: 6627584
    Abstract: The present invention provides a power transmission lubricating composition containing a base oil, a dispersant, a lubricant additive produced by the reaction of a dihydrocarbyldithio-phosphoric acid and a hydrocarbyl acrylate, and optionally a viscosity index improver. Improved friction performances in automatic and continuously variable transmissions are achieved by utilizing the fluids of the present invention in ash-free lubricating oil compositions for transmissions and axles.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: September 30, 2003
    Assignee: Ethyl Corporation
    Inventor: Nubar Ozbalik
  • Patent number: 6624124
    Abstract: A biodegradable penetrating lubricant, comprised of: (A) at least one triglyceride oil of the formula: wherein R1, R2, and R3 are aliphatic hydrocarbyl groups containing from about 7 to about 23 carbon atoms; (B) an organic solvent selected from the group comprising: (1) ethyl lactate, (2) soy methyl ester, (3) at least one mineral spirit, and (4) combinations of 1, 2, and 3; and, (C) an antioxidant. Optionally, the lubricant may further include an additive selected from the group comprising: (D) an anti-wear inhibitor; (E) a corrosion inhibitor; (F) a pour point depressant; and, (G) a component chosen from the group comprising: (1) a food grade tackifier; (2) molybdenum disulfide; and (3) a combination of 1 and 2.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: September 23, 2003
    Assignee: Renewable Lubricants, Inc.
    Inventor: William W. Garmier
  • Patent number: 6620772
    Abstract: A biodegradable penetrating lubricant, comprised of: (A) at least one triglyceride oil of the formula: wherein R1, R2, and R3 are aliphatic hydrocarbyl groups containing from about 7 to about 23 carbon atoms; (B) an organic solvent selected from the group comprising: (1) ethyl lactate, (2) methyl ester, and (3) combinations of 1 and 2; (C) an antioxidant; and, (D) a corrosion inhibitor. Optionally, the lubricant may further an additive selected from the group comprising: (E) a viscosity modifier; (F) an anti-wear inhibitor; and, (G) an emulsifier.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: September 16, 2003
    Assignee: Renewable Lubricants, Inc.
    Inventor: William Garmier
  • Patent number: 6617286
    Abstract: To provide a lubricating oil composition for continuously variable transmission which ensures both a high coefficient of friction between metals required for a push belt-type CTV oil and excellent oxidation stability guaranteeing the performance over a long time. A lubricating oil composition for continuously variable transmission is provided, which comprises a lubricating base oil made of a mineral oil and/or a synthetic oil formulated with a wear preventive a metal detergent and an ashless dispersant, wherein the ashless dispersant is made of a boron-containing succinimide having boron at a rate of one or more atoms in one molecule of the ashless dispersant.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: September 9, 2003
    Assignee: Tonen General Sekiyu K.K.
    Inventors: Takehisa Sato, Takanori Kugimiya
  • Patent number: 6617287
    Abstract: A novel lubricating composition for manual transmissions with improved performance with sintered synchronized components. The lubricating oil composition contains high level of an alkaline earth sulfonate and amine phosphates.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: September 9, 2003
    Assignee: The Lubrizol Corporation
    Inventors: Michael P. Gahagan, Brian M. O'Connor
  • Patent number: 6617288
    Abstract: This invention relates to an aqueous composition comprising water, a surfactant or thickener, and at least one metal-free thiophosphorus acid ester, at least one amine salt of the thiophosphorus acid ester, or a mixture thereof, wherein the thiophosphorus acid ester contains at least one hydrocarbyl terminated oxyalkylene group, at least one hydrocarbyl terminated polyoxyalkylene group, or a mixture thereof. The aqueous compositions have improved antiwear/extreme pressure properties and improved antioxidation properties. In these compositions, the thiophosphorus acid esters and their salts act as antiwear agents and rust inhibitors.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: September 9, 2003
    Assignee: The Lubrizol Corporation
    Inventors: Naresh Chand Mathur, Edward J. Konzman
  • Patent number: 6613724
    Abstract: A gas-fuelled engine lubricating oil composition that is substantially free from anti-oxidant additives. The gas-fuelled engine lubricating oil composition exhibits good resistance to oil oxidation and nitration and improved corrosion resistance. The composition includes: (i) an oil of lubricating viscosity; (ii) a detergent composition including at least one calcium salicylate having a TBN in the range from 70 to 245; (iii) 0 to 0.2 mass % of nitrogen, based on the mass of the oil composition, of a dispersant; and (iv) a minor amount of one or more co-additives.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: September 2, 2003
    Assignee: Infineum International Ltd.
    Inventors: Keith Strickland, Laurent Chambard