Graphite, Coal, Or Elemental Carbon Patents (Class 508/109)
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Publication number: 20080070815Abstract: 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: ApplicationFiled: September 18, 2007Publication date: March 20, 2008Inventors: Seiji Kamada, Takafumi Ueno, Tomihito Hashimoto
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Patent number: 7235514Abstract: 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: GrantFiled: April 11, 2001Date of Patent: June 26, 2007Assignee: Tri-Mack Plastics Manufacturing Corp.Inventors: Edward J. Mack, Sr., James P. Mack, Thomas P. Mack
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Patent number: 7176166Abstract: 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: GrantFiled: October 16, 2003Date of Patent: February 13, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventor: Kurodo Maeda
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Patent number: 6953760Abstract: 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: GrantFiled: June 4, 2003Date of Patent: October 11, 2005Assignee: Saint-Gobain Ceramics & Plastics, Inc.Inventors: Vimal K. Pujari, Jeffrey J. Kutsch
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Patent number: 6943137Abstract: 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: GrantFiled: December 19, 2002Date of Patent: September 13, 2005Assignee: Kabushiki Kaisha RikenInventor: Mika Saito
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Patent number: 6852677Abstract: 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: GrantFiled: May 31, 2001Date of Patent: February 8, 2005Assignee: Ticona GmbHInventors: Klaus Kurz, Oskar Schleith
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Patent number: 6828282Abstract: 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: GrantFiled: March 15, 2002Date of Patent: December 7, 2004Assignee: Hyperion Catalysis International, Inc.Inventors: David Moy, Chunming Niu, Howard Tennent, Robert Hoch
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Patent number: 6734147Abstract: 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: GrantFiled: October 3, 1997Date of Patent: May 11, 2004Assignee: LCC County Mosquito ControlInventor: Richard Levy
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Patent number: 6716800Abstract: 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: GrantFiled: April 12, 2002Date of Patent: April 6, 2004Assignee: John Crane Inc.Inventors: Joseph F. Demendi, Xin Chen, William R. Clemens
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Patent number: 6689721Abstract: 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: GrantFiled: February 27, 2003Date of Patent: February 10, 2004Assignee: NSK Ltd.Inventors: Katsuaki Denpo, Atsushi Yokouchi, Koichi Hachiya, Michiharu Naka, Tooru Shouda, Hideki Koizumi
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Publication number: 20030195122Abstract: 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: ApplicationFiled: April 12, 2002Publication date: October 16, 2003Applicant: John Crane Inc.Inventors: Joseph F. Demendi, Xin Chen, William R. Clemens
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Publication number: 20030144156Abstract: 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: ApplicationFiled: December 19, 2002Publication date: July 31, 2003Applicant: Kabushiki Kaisha RikenInventor: Mika Saito
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Patent number: 6589918Abstract: 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: GrantFiled: June 21, 2001Date of Patent: July 8, 2003Assignee: NSK Ltd.Inventors: Katsuaki Denpo, Atsushi Yokouchi, Koichi Hachiya, Michiharu Naka, Tooru Shouda, Hideki Koizumi
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Patent number: 6579833Abstract: 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: GrantFiled: May 9, 2000Date of Patent: June 17, 2003Assignee: The Board of Trustees of the University of IllinoisInventors: Michael J. McNallan, Daniel Ersoy, Yury Gogotsi
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Publication number: 20030087767Abstract: 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: ApplicationFiled: July 5, 2001Publication date: May 8, 2003Inventors: Shinya Goto, Naoki Torii, Hiroaki Ohsako, Kouitsu Itoh
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Patent number: 6376061Abstract: 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: GrantFiled: February 26, 1999Date of Patent: April 23, 2002Assignee: Federal-Mogul Wiesbaden GmbHInventor: Achim Adam
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Patent number: 6323160Abstract: 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: GrantFiled: March 8, 2000Date of Patent: November 27, 2001Assignee: AlliedSignal Inc.Inventors: Neil Murdie, Charles A. Parker, James F. Pigford, Dave Narasimhan, Frank Dillon
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Publication number: 20010031346Abstract: 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: ApplicationFiled: March 21, 2001Publication date: October 18, 2001Applicant: KABUSHIKI KAISHA KOBE SEIKO SHOInventor: Eiji Iwamura
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Patent number: 6228814Abstract: 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: GrantFiled: February 1, 2000Date of Patent: May 8, 2001Assignee: Toyo Tanso Co., Ltd.Inventors: Arai Miyoji, Miyatani Toshiyuki, Tojo Tetsuro, Murata Tadashi, Watanabe Nobuatsu
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Patent number: 5998339Abstract: 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: GrantFiled: October 7, 1997Date of Patent: December 7, 1999Assignee: Daido Metal Company Ltd.Inventors: Eiji Kato, Shoji Yasunaga, Hidehiko Tamura, Tadashi Tanaka
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Patent number: 5955402Abstract: 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: GrantFiled: January 29, 1998Date of Patent: September 21, 1999Assignee: NTN CorporationInventors: Masakazu Hirata, Mari Kataoka, Shoji Obuchi, Masanobu Ajioka
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Patent number: 5840666Abstract: 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: GrantFiled: December 20, 1996Date of Patent: November 24, 1998Assignee: NSK Ltd.Inventors: Atsushi Yokouchi, Hideki Koizumi, Kenichi Iso, Michiharu Naka
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Patent number: 5750046Abstract: 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: GrantFiled: May 27, 1997Date of Patent: May 12, 1998Inventor: William B. Wheeler
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Patent number: 5732322Abstract: 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: GrantFiled: May 22, 1995Date of Patent: March 24, 1998Assignee: Oiles CorporationInventors: Takashi Nakamaru, Sumihide Yanase, Akihiko Okimura
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Patent number: 5668091Abstract: 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: GrantFiled: October 31, 1995Date of Patent: September 16, 1997Assignee: Christina GrinhamInventors: Terry Grinham, Marc Salvador
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Patent number: 5635299Abstract: 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: GrantFiled: September 30, 1994Date of Patent: June 3, 1997Assignee: Tsubakimoto Chain Co.Inventor: Kouji Tanaka
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Patent number: 5614477Abstract: 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: GrantFiled: September 7, 1995Date of Patent: March 25, 1997Inventors: Vladimir Kompan, Vitaly Slobodsky