Graphite, Coal, Or Elemental Carbon Patents (Class 508/109)
  • Publication number: 20080070815
    Abstract: A low friction sliding mechanism employed in an internal combustion engine of an automotive vehicle. The low friction sliding mechanism includes first and second sliding members which are in slidable contact with each other. At least one of the first and second sliding members has a sliding surface portion whose at least a part is formed of a resinous material containing hydrophilic fine particle. Additionally, a lubricant exists between the first and second sliding members and includes a friction modifier containing at least one of organic oxygen-containing compound and aliphatic amine-based compound.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 20, 2008
    Inventors: Seiji Kamada, Takafumi Ueno, Tomihito Hashimoto
  • Patent number: 7235514
    Abstract: An article having a bearing surface with improved wear characteristics is provided. The article may be formed from a composition that includes a polymeric material, a lubricious and reinforcing additive, and a solid lubricant. Methods for forming the compositions and structures are also provided.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: June 26, 2007
    Assignee: Tri-Mack Plastics Manufacturing Corp.
    Inventors: Edward J. Mack, Sr., James P. Mack, Thomas P. Mack
  • Patent number: 7176166
    Abstract: The present invention intends to provide a slide member with increasing an abrasion resistance and an adherence, a friction coefficient is further decreased. A part of the base member surface of the slide member is provided with a streak so that a surface roughness thereof by a ten-point height of roughness profile is 8 to 18 ?mRz. A dry coat lubricant has polyamideimide resin, at least one kind of a layer improve agent selected from epoxysilane and epoxy resin, and at least one kind of hard particles selected from a silicon nitride and an alumina. Such construction can not only increase the abrasion resistance and the adherence of the slide member, but can decrease friction coefficient of the slide member.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: February 13, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kurodo Maeda
  • Patent number: 6953760
    Abstract: A ceramic component is disclosed, including a sintered ceramic body from a composition comprising a first ceramic material, and a plurality of inclusions in the ceramic body, each inclusion comprising graphite and a second ceramic material.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: October 11, 2005
    Assignee: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Vimal K. Pujari, Jeffrey J. Kutsch
  • Patent number: 6943137
    Abstract: A first sliding member of the present invention is made of a composition comprising 10-50% by weight of carbon fibers and 2-30% by weight of a thermoplastic elastomer, the balance being substantially a polyphenylene sulfide resin, at least in a sliding surface portion. A second sliding member of the present invention is made of a composition comprising 10-50% by weight of glass fibers and 2-30% by weight of a thermoplastic elastomer, the balance being substantially a polyphenylene sulfide resin, at least in a sliding surface portion.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: September 13, 2005
    Assignee: Kabushiki Kaisha Riken
    Inventor: Mika Saito
  • Patent number: 6852677
    Abstract: Polyoxymethylene with addition of a lubricant mixture composed of an aliphatic ester and of a polyethylene wax improves in-feed behavior into the injection-molding machine without substantially changing tribological behavior, when comparison is made with a polyoxymethylene which has only an aliphatic ester. The weld-line strength of the molding is also improved. The molding composition is used for moldings of any type with high tribological requirements running against hard materials.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: February 8, 2005
    Assignee: Ticona GmbH
    Inventors: Klaus Kurz, Oskar Schleith
  • Patent number: 6828282
    Abstract: Improved fuel compositions containing carbon nanotubes in from 0.01% to 30.0% by weight of fuel have improved burn rate and other valuable properties. Improved lubricant compositions containing carbon nanotubes in from 0.01 to 20.0% by weight of lubricant have improved viscosity and other valuable properties.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: December 7, 2004
    Assignee: Hyperion Catalysis International, Inc.
    Inventors: David Moy, Chunming Niu, Howard Tennent, Robert Hoch
  • Patent number: 6734147
    Abstract: A process is disclosed for manufacturing a lubricant composition comprising combining a superabsorbent polymer with a material for decreasing friction between moving surfaces. The superabsorbent polymer absorbs from about 25 to greater than 100 times its weight in water and may comprise a polymer of acrylic acid, an acrylic ester, acrylonitrile or acrylamide, including co-polymers thereof or starch graft co-polymers thereof or mixtures thereof. A product produced by the process includes the material for decreasing friction comprising a petroleum lubricant containing an additive, water containing an additive, synthetic lubricant, grease, solid lubricant or metal working lubricant, wherein the synthetic lubricant, grease, solid lubricant or metal working lubricant optionally contain an additive. A process comprising controlling the delivery of a lubricant to at least one of two moving surfaces in order to decrease friction between said moving surfaces, is also disclosed.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: May 11, 2004
    Assignee: LCC County Mosquito Control
    Inventor: Richard Levy
  • Patent number: 6716800
    Abstract: A composite body of silicon carbide having binderless, allotropic carbon granules distributed throughout is produced. The nominal size of the binderless allotropic carbon granules can range from 5 to 500 micrometers. The concentration of the binderless allotropic carbon particles can vary from 1.0 to 35.0 weight percent. The process to produce such a composite body is to sinter silicon carbide with binderless, carbon-yielding precursor granules. The composite body is utilized in tribological applications. The dense, impervious silicon carbide-binderless carbon composite exhibits excellent physical and tribological characteristics when used as a mechanical face seal, a sliding bearing arrangement, or some other rubbing component.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: April 6, 2004
    Assignee: John Crane Inc.
    Inventors: Joseph F. Demendi, Xin Chen, William R. Clemens
  • Patent number: 6689721
    Abstract: This invention is to provide a conductive grease which is less to decrease conductivity as a time passes. The conductive grease comprises a base oil, a thickener, a conductive solid powder, and at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent, wherein an amount of the conductive solid powder added is 0.1 to 10 wt %, and an amount of the at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent added is 0.1 to 10 wt %. Further, the conductive grease comprises the base oil and at least one of conductive additives, and the conductive additives are fibrous carbon, metallic particle, metallic compound particle and carbon nano-tube. The conductive grease to be packed into the rolling bearing comprises conductive fine particles such as carbon black and has an oil separation degree of 2% or lower.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: February 10, 2004
    Assignee: NSK Ltd.
    Inventors: Katsuaki Denpo, Atsushi Yokouchi, Koichi Hachiya, Michiharu Naka, Tooru Shouda, Hideki Koizumi
  • Publication number: 20030195122
    Abstract: A composite body of silicon carbide having binderless, allotropic carbon granules distributed throughout is produced. The nominal size of the binderless allotropic carbon granules can range from 5 to 500 micrometers. The concentration of the binderless allotropic carbon particles can vary from 1.0 to 35.0 weight percent. The process to produce such a composite body is to sinter silicon carbide with binderless, carbon-yielding precursor granules. The composite body is utilized in tribological applications. The dense, impervious silicon carbide-binderless carbon composite exhibits excellent physical and tribological characteristics when used as a mechanical face seal, a sliding bearing arrangement, or some other rubbing component.
    Type: Application
    Filed: April 12, 2002
    Publication date: October 16, 2003
    Applicant: John Crane Inc.
    Inventors: Joseph F. Demendi, Xin Chen, William R. Clemens
  • Publication number: 20030144156
    Abstract: A first sliding member of the present invention is made of a composition comprising 10-50% by weight of carbon fibers and 2-30% by weight of a thermoplastic elastomer, the balance being substantially a polyphenylene sulfide resin, at least in a sliding surface portion. A second sliding member of the present invention is made of a composition comprising 10-50% by weight of glass fibers and 2-30% by weight of a thermoplastic elastomer, the balance being substantially a polyphenylene sulfide resin, at least in a sliding surface portion.
    Type: Application
    Filed: December 19, 2002
    Publication date: July 31, 2003
    Applicant: Kabushiki Kaisha Riken
    Inventor: Mika Saito
  • Patent number: 6589918
    Abstract: This invention is to provide a conductive grease which is less to decrease conductivity as a time passes. The conductive grease comprises abase oil, a thickener, a conductive solid powder, and at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent, wherein an amount of the conductive solid powder added is 0.1 to 10 wt %, and an amount of the at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent added is 0.1 to 10 wt %. Further, the conductive grease comprises the base oil and at least one of conductive additives, and the conductive additives are fibrous carbon, metallic particle, metallic compound particle and carbon nano-tube. The conductive grease to be packed into the rolling bearing comprises conductive fine particles such as carbon black and has an oil separation degree of 2% or lower.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: July 8, 2003
    Assignee: NSK Ltd.
    Inventors: Katsuaki Denpo, Atsushi Yokouchi, Koichi Hachiya, Michiharu Naka, Tooru Shouda, Hideki Koizumi
  • Patent number: 6579833
    Abstract: A process for the synthesis of carbon coatings on the surface of metal carbides, preferably SiC, by etching in a halogen-containing gaseous etchant, and optionally hydrogen gas, leading to (he formation of a carbon layer on the metal carbide. The reaction is performed in gas mixtures containing about 0% (trace) amounts to 100% halogen-containing gaseous etchant, e.g., Cl2, and about 0% to 99.9% H2 (hydrogen gas) at temperatures from about 100° C. to about 4,000° C., preferably about 800° C. to about 1,200° C., over any time range, maintaining a pressure of preferably about one atmosphere, to about 100 atmospheres.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: June 17, 2003
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Michael J. McNallan, Daniel Ersoy, Yury Gogotsi
  • Publication number: 20030087767
    Abstract: A wiper blade rubber having a coating film on both surfaces of the lip part, the coating film comprising a particulate solid lubricant and a binder and the binder having a 0.5% modulus of 1 MPa or more and an elongation to break of 1% or more.
    Type: Application
    Filed: July 5, 2001
    Publication date: May 8, 2003
    Inventors: Shinya Goto, Naoki Torii, Hiroaki Ohsako, Kouitsu Itoh
  • Patent number: 6376061
    Abstract: A composite multilayer material is described which exhibits relatively high wear and delamination resistance without impairment of the coefficient of friction in the presence of oil. The composite multilayer material contains at least one powder-form polyaramid in its overlay, the content of PTFE or of PTFE together with the other fluorothermoplastics which form the matrix material amounting to 55-90 vol. %, the content of further fillers amounting to 9.5-44.5 vol. % and the content of polyaramid amounting to 0.5-10 vol. %.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: April 23, 2002
    Assignee: Federal-Mogul Wiesbaden GmbH
    Inventor: Achim Adam
  • Patent number: 6323160
    Abstract: A carbon-carbon composite material is made by providing an open-celled carbon foam preform, and densifying the preform with carbonaceous material. The open-celled carbon foam preform may be oxygen stabilized prior to carbonization, and the foam preform densified by CVD, HIP, PIC, VPI, pitch and resin injection, or any combination thereof. The carbon-carbon composite material can be heat treated to provide thermal management materials, structural materials, or a friction material for use in a brake or clutch mechanism.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: November 27, 2001
    Assignee: AlliedSignal Inc.
    Inventors: Neil Murdie, Charles A. Parker, James F. Pigford, Dave Narasimhan, Frank Dillon
  • Publication number: 20010031346
    Abstract: A coating film and a coated machine component that have an excellent wear resistance, a low friction coefficient, and an excellent sliding performance are provided. A coating film of the present invention is a DLC hard multilayer film 3 which has a low hardness hard carbon layer 4 containing a graphite cluster having a mean size of 2 nm or more, and a high hardness hard carbon layer 5 containing a graphite cluster having a mean size of 1 nm or less, the low hardness carbon layer 4 and the high hardness carbon layer 5 being amorphous structures each containing carbon as a main component, and being alternately laminated. The graphite cluster in the low hardness hard carbon layer 4 preferably has a shell structure in which the C-planes of graphite are laminated in the form of spherical nuclei. Further, it is preferable that the outermost layer A is formed of the low hardness hard carbon layer, and the layer thickness thereof is set at from 2 nm to 200 nm.
    Type: Application
    Filed: March 21, 2001
    Publication date: October 18, 2001
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO
    Inventor: Eiji Iwamura
  • Patent number: 6228814
    Abstract: The present invention relates to a carbonaceous composite material that can fully produce the characteristic effect of the graphite fluoride containing carbonaceous composite material with a minimum additive ratio of graphite fluoride and simultaneously can produce the secondary corrosion inhibiting properties and to a sliding member using the same. The carbonaceous composite material of the present invention features in that it contains graphite fluoride; and alkaline agent for neutralization of hydrogen fluoride or adsorbent for fixation of hydrogen fluoride, the remainder being carbonaceous components. The sliding member of the invention is the one made by using the carbonaceous composite material of the invention. Specifically, the carbonaceous composite material of the invention is applicable to an electric sliding brush, a mechanical sealing member, a bearing member and the like.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: May 8, 2001
    Assignee: Toyo Tanso Co., Ltd.
    Inventors: Arai Miyoji, Miyatani Toshiyuki, Tojo Tetsuro, Murata Tadashi, Watanabe Nobuatsu
  • Patent number: 5998339
    Abstract: A wet type sliding apparatus comprising a wet type radial bearing which starts in the presence of a lubricating liquid, wherein the radial bearing has a sliding surface consisting of a resin composition comprising 10 to 45% by weight of a carbon fiber and 0.1 to 8.5% by weight of a fluorocarbon polymer, the balance being substantially an aromatic polyetherketone resin or a polyarylene sulfide resin. The radial bearing in the above wet type sliding apparatus is excellent in wear resistance even under a high load.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: December 7, 1999
    Assignee: Daido Metal Company Ltd.
    Inventors: Eiji Kato, Shoji Yasunaga, Hidehiko Tamura, Tadashi Tanaka
  • Patent number: 5955402
    Abstract: A biodegradable lubricative resin composition which withstands use as a material for sliding parts, and slide bearings and gears made from such a resin composition. The resin composition contains an aliphatic polyester which is a monopolymer or copolymer of a hydroxy-carboxylic acid or an aliphatic polyhydroxy alcohol and an aliphatic polybase, the aliphatic polyester preferably containing 50-100 wt % lactic acid, and a lubricant which is a lubricating oil or a solid lubricant. Slide bearings and gears molded from such a resin composition are also proposed.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: September 21, 1999
    Assignee: NTN Corporation
    Inventors: Masakazu Hirata, Mari Kataoka, Shoji Obuchi, Masanobu Ajioka
  • Patent number: 5840666
    Abstract: A grease composition comprising a base oil, a thickener selected from a metallic soap and a urea compound, and an inorganic filler having an average particle size of not greater than 2 .mu.m, and a rolling bearing having sealed therein a grease composition comprising a base oil, a urea thickener, and an inorganic filler having an average particle size of not greater than 2 .mu.m.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: November 24, 1998
    Assignee: NSK Ltd.
    Inventors: Atsushi Yokouchi, Hideki Koizumi, Kenichi Iso, Michiharu Naka
  • Patent number: 5750046
    Abstract: A method of maintaining and servicing air conditioning systems and compositions therefor are provided whereby newer, more environmentally friendly R-134a refrigerant gas is substituted for the older R-12 and R-22 types. In addition, a method of flushing and internal lubrication of the system is presented, along with a new flush solvent and a new lubricant composition for use with an R-134a refrigerant gas.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: May 12, 1998
    Inventor: William B. Wheeler
  • Patent number: 5732322
    Abstract: The disclosure describes a resin composition for a sliding member, comprising 1 to 25 wt % of component A selected from the group consisting of phosphates and barium sulfate, 1 to 15 wt % of component B selected from the group consisting of magnesium silicate and mica, and 5 to 50 wt % of component C selected from the group consisting of lead, tin, lead-tin alloy and mixtures thereof, the balance of polytetrafluoroethylene.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: March 24, 1998
    Assignee: Oiles Corporation
    Inventors: Takashi Nakamaru, Sumihide Yanase, Akihiko Okimura
  • Patent number: 5668091
    Abstract: A lubrication block, with or without a cavity, or a lubrication bag, for lubricating an ID surface of a tire and an OD surface of a plurality of pads of rotary trunnion supported equipment, such as a kiln, cooler, dryer, reactor, granulator and ball mill operating at temperatures from 100.degree. F. to 500.degree. F. or higher. The tire has inner and outer faces, and the inner face of the tire is slipped over the plurality of pads or filler bars welded to an outer shell of the rotary equipment. The lubrication block or bag is sized so as to be inserted in between the pads. The lubrication block comprises a lubricant and a solid carrier for said lubricant. The carrier is selected from the group consisting of waxes such as paraffin, polymers, copolymers such as ethylene or polyethylene glycol or mixtures thereof, and the lubricant comprises powdered carbon and a soft metal powder (e.g. copper, zinc, aluminum) or a noble metal powder (e.g. silver, copper).
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: September 16, 1997
    Assignee: Christina Grinham
    Inventors: Terry Grinham, Marc Salvador
  • Patent number: 5635299
    Abstract: A sliding member usable in dry and wet states includes a synthetic resin coated filler powder composition obtained by polymerizing a polyethylene based composition in the presence of a filler having a friction-reducing and/or wear-resisting property, uniformly dispersed in a matrix made of a waterproof synthetic resin, and optionally a reinforcing material as needed.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: June 3, 1997
    Assignee: Tsubakimoto Chain Co.
    Inventor: Kouji Tanaka
  • Patent number: 5614477
    Abstract: A mixture of graphite and diamond particles is suspended in a liquid. The mixture is applied between relatively moving metal surfaces. The diamond particles subsequently become embedded in the surface of the metal. The surface treatment and embedding by the diamond particles thereby increases the lubricity of the moving surfaces.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: March 25, 1997
    Inventors: Vladimir Kompan, Vitaly Slobodsky