Graphite, Coal, Or Elemental Carbon Patents (Class 508/109)
  • Patent number: 10634249
    Abstract: A piston ring in which carbon films with film qualities optimized to be adapted to required performance are formed on an outer circumferential sliding surface and top and bottom surfaces thereof with good productivity is provided, and a high-performance engine which employs the piston ring is also provided. In the piston ring, a carbon film is formed on an outer circumferential sliding surface and top and bottom surfaces. The carbon film contains a stacking of at least two types of carbon film layers with different film qualities, and a thickness ratio of the two types of carbon film layers is different between the outer circumferential sliding surface and the top and bottom surfaces.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: April 28, 2020
    Assignees: Nippon ITF, Inc., Honda Motor Co., Ltd.
    Inventors: Takehiko Ooshiro, Koji Miyake, Masanori Tsujioka, Satoshi Yoshida
  • Patent number: 9803273
    Abstract: The invention relates to the production of wear-resistant layers which are exposed to friction wear on surfaces of components of internal combustion engines. In the process, wear-resistant layers are formed on the respective surface by electric arc discharge under vacuum conditions. The wear-resistant layers are formed from at least approximately hydrogen-free tetrahedrally amorphous (ta-C) comprising a mixture of sp2 and sp3 hybridized carbon and have a microhardness of at least 3500 HV and an arithmetical mean roughness value Ra of 0.1 ?m without a mechanical, physical and/or chemical surface processing taking place.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: October 31, 2017
    Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., H-O-T HAERTE- UND OBERFLAECHENTECHNIK GMBH & CO. KG
    Inventors: Andreas Leson, Hans-Joachim Scheibe, Frank-Peter Bach
  • Publication number: 20150148271
    Abstract: The invention relates to a sliding layer based on a fiber-reinforced plastic, having a plastic matrix and at least one plastic thread as a reinforcement element. Said plastic matrix comprises at least one metal soap, preferably based on lithium stearate. No stick-slip effect occurs when using said sliding elements comprising said type of sliding layers, with steel counter elements.
    Type: Application
    Filed: June 5, 2013
    Publication date: May 28, 2015
    Inventors: Hannes Golob, Thomas Walter, Dorit Pitz, Martin Muller-Brodmann, Martin Pitz, Achim Schmidt
  • Publication number: 20150125101
    Abstract: A sliding bearing for an internal combustion engine having a plastics polymer-based composite layer on a substrate, the composite layer comprising: a matrix of plastics polymer-based material having distributed throughout the matrix; 0.1 to 5% vol carbon nanostructures; and incidental impurities; and a method of manufacture of such a sliding bearing.
    Type: Application
    Filed: May 9, 2013
    Publication date: May 7, 2015
    Inventor: Roohollah Kachoosangi
  • Publication number: 20150072906
    Abstract: A sliding mechanism includes first and second members slidable relative to each other and a grease composition interposed between the first and second members and containing a thickening agent and a base oil, wherein the grease composition contains lithium 12-hydroxystearate as the thickening agent and dioctyl sebacate and/or poly-?-olefin as the base oil; and wherein at least one of the first and second member has a sliding surface coated with a hard carbon film of diamond-like carbon.
    Type: Application
    Filed: March 29, 2013
    Publication date: March 12, 2015
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Makoto Hayama, Terasu Yoshinari, Masanori Komaba, Yutaka Mabuchi, Yoshiteru Yasuda, Saburo Abe, Katsuyuki Serizawa, Tsuyoshi Higuchi
  • Patent number: 8911875
    Abstract: A sliding element, particularly a piston ring for an internal combustion engine, includes a substrate, and a wear-protection layer, obtained by thermal spraying of a powder comprising the element proportions 2-50 percent by weight iron, FE; 5-60 percent by weight tungsten, W; 5-40 percent by weight chrome, Cr; 5-25 percent by weight nickel, Ni; 1-5 percent by weight molybdenum, Mo; 1-10 carbon, C and 0.1-2 percent by weight silicon, Si; and a running-in layer, obtained by thermal spraying of a powder comprising the element proportions 60-95 percent by weight nickel; 5-40 percent by weight carbon.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: December 16, 2014
    Assignee: Federal-Mogul Burscheid GmbH
    Inventors: Marcus Kennedy, Michael Zinnabold, Marc-Manuel Matz
  • Publication number: 20140349898
    Abstract: A swash plate type compressor is arranged with a plurality of semispherical shoes and a disc shaped swash plate. A resin coating having a honeycomb structure is formed on a surface and a rear surface (sliding surface) of the swatch plate which slides with the shoe. An edge part (top end) of each of the multiple cylinder bodies which forms the resin coating layer are at the same plane and forms a sliding surface which slides with the shoe. In addition, an interior space of each cylinder body forms a storage part of a lubricant and a container part for foreign objects. The swash plate can be provided with excellent wear resistance, seizure resistance and lubrication retention.
    Type: Application
    Filed: October 30, 2012
    Publication date: November 27, 2014
    Applicant: TAIHO KOGYO CO., Ltd.
    Inventors: Kyohei Yamane, Shingo Goto
  • Patent number: 8895488
    Abstract: A sliding structural member is provided which achieves a good low frictional property. A DLC film 2 containing hydrogen is provided on one member 11 between members sliding against each other, and the one member and a counterpart member 12 are combined in such a way that the DLC film 2 provided on the one member 11 slides against the counterpart member via a lubricant 3 to which organic molybdenum compound and compound containing zinc and sulfur are added as an additive. A root mean square roughness of a surface of the DLC film 2 is set in a range from 5 nm or more to 25 nm or less, and hydrogen content of the DLC film 2 is set in a range from 4.5 at % (atomic %) or more to 30 at % or less.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: November 25, 2014
    Assignee: Honda Motor Co., Ltd
    Inventor: Kentaro Komori
  • Patent number: 8846590
    Abstract: A method of lubricating a surface coated with a diamond-like carbon film or coating which comprises supplying to said surface a lubricating oil composition comprising an oil of lubricating viscosity and an effective friction reducing amount of an oil soluble organo-molybdenum compound.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: September 30, 2014
    Assignee: Infineum International Limited
    Inventor: Rebecca Castle
  • Publication number: 20140079910
    Abstract: An object of the invention is to provide a carbon film laminate having a sliding surface with low friction, low abrasion, and low counterpart aggressiveness using high adhesiveness to a base material, hardness, surface flatness, low counterpart aggressiveness, transparency, and high thermal conductivity which are provided to the carbon film without using liquid and semiliquid lubricants such as lubricating oil. Provided is a carbon film laminate including a base material, a carbon film adhesion reinforcing layer which is provided on the base material and which is formed from silicon oxide (SiOx, x=1 to 2) containing fluorine atoms (F) in a concentration of 1×1019 atoms/cm3 or more, and a carbon film that is formed on the carbon film adhesion reinforcing layer. The carbon film contains fluorine atoms in the film in a concentration of 1×1019 to 1×1021 atoms/cm3, and has an approximate spectrum curve obtained by superimposing, on a peak fitting curve A at a Bragg angle (2?±0.5°) of 43.
    Type: Application
    Filed: May 10, 2012
    Publication date: March 20, 2014
    Inventors: Kazuo Tsugawa, Shunsuke Kawaki, Masatou Ishihara, Yoshinori Koga, Masataka Hasegawa, Jaeho Kim
  • Publication number: 20140024563
    Abstract: Anti-wear surface coatings and methods for making them are provided. Such anti-wear surface coatings are particularly suitable for use in a compressor, such as a scroll or rotary compressor. A precursor powder material can be applied via spraying to a wear surface of a metal component of the scroll or rotary compressor. The precursor powder material comprises a powderized thermoplastic polymer (e.g., PEEK), a first lubricant particle (e.g., molybdenum disulfide (MoS2)) and a second lubricant particle (e.g., polytetrafluoroethylene (PTFE)), which is heated to form a substantially uniform coating covering the underlying metal component having a thickness of less than or equal to about 0.006 inches (about 152 ?m). The anti-wear surface coating can be used on a face seal for a bellows-type shaft seal for compressors.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 23, 2014
    Inventors: Matthew J. Heidecker, Jean-Luc M. Caillat
  • Publication number: 20140005084
    Abstract: The present invention relates to a component part comprising at least two components movable with respect to one another, between the surfaces of which is provided a film formed by a lubricant oil composition, the surface of at least one of the movable components being formed at least partly by a diamond-like-carbon layer (DLC layer) and the lubricant oil composition comprising at least one polymer comprising repeat units derived from amine derivatives of at least one polar ethylenically unsaturated monomer.
    Type: Application
    Filed: May 10, 2012
    Publication date: January 2, 2014
    Applicant: Evonik Oil Additives GmbH
    Inventors: Boris Eisenberg, Torsten Stoehr
  • Publication number: 20140005083
    Abstract: Embodiments of the present invention may provide textured surfaces to be lubricated, the texturing to enhance the effectiveness of the intended nano-lubrication. The texturing may make asperities and depressions in the surface to be lubricated. This texturing may be executed, for example, by chemical etching, laser etching, or other techniques. This texturing may create locations in the lubricated surface to hold or anchor the intended nano-lubricants, to facilitate the creation of a tribo-film on the surface when the lubricated surface is used under pressure, and resulting in delivery of multiple chemistries from the nano-lubricant.
    Type: Application
    Filed: June 13, 2013
    Publication date: January 2, 2014
    Applicant: NanoMech, Inc.
    Inventor: Ajay P. Malshe
  • Patent number: 8575076
    Abstract: There is provided a sliding member including a base body and a hard carbon coating formed on the base body to define a sliding surface for sliding contact with an opposing member under lubrication according to one embodiment of the present invention. The hard carbon coating has an outermost surface portion lower in hydrogen content than a remaining portion thereof, or an outermost coating layer lower in hydrogen content than at least one other coating layer.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: November 5, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takahiro Hamada, Makoto Kano, Yutaka Mabuchi
  • Patent number: 8557749
    Abstract: The invention relates to bodies of sliding material comprising graphite and synthetic resin binder which have improved wear properties and comprise no hygroscopic compounds, such as, for example, phosphates, and in which the graphite filler is composed of a component based on natural graphite and at least one component based on synthetic graphite.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: October 15, 2013
    Assignee: SGL Carbon SE
    Inventors: Thomas Metzinger, Adi Woizenko
  • Publication number: 20130252859
    Abstract: A method and composition for producing a monolithic hybrid composite consisting of a composite matrix, a reinforcement phase, and a solid/self-lubrication phase. The composition may comprise a graphite (“C”) phase and a titanium carbide (“TiC”) phase in a nickel (“Ni”) matrix. The process may include the step of blending pure Ni and pure titanium (“Ti”) powders with Ni-coated graphite powder using Laser Engineered Net Shaping (“LENS”).
    Type: Application
    Filed: February 18, 2013
    Publication date: September 26, 2013
    Inventors: Sundeep Gopagoni, Thomas W. Scharf, Rajarshi Banerjee, Jaimie S. Tiley
  • Patent number: 8518862
    Abstract: An anti-seizing agent including: a first solid lubricant containing at least one of bismuth and a bismuth compound; and a second solid lubricant containing at least one of graphite, molybdenum disulfide and boron nitride. The anti-seizing agent satisfies the relationships 20 weight %?a?90 weight % and 10 weight %?d?80 weight %, in which a sum of the contents of the first solid lubricant and the second solid lubricant in the anti-seizing agent is taken as 100 weight %, and a represents a content of the first solid lubricant and d represents a content of the second solid lubricant.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: August 27, 2013
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Akiyoshi Kato, Naoki Yamada, Noboru Fujita, Takuya Takase
  • Patent number: 8518863
    Abstract: A sliding member has a base material whose surface is at least partially covered with a DLC film, wherein an intermediate layer is interposed between the base material and the DLC film, and the intermediate layer has a multilayer structure obtained by stacking a first Cr layer, a CrN layer and a second Cr layer successively from the side closer to the base material.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: August 27, 2013
    Assignees: JTEKT Corporation, CNK Co., Ltd.
    Inventors: Masahiro Suzuki, Kazuyoshi Yamakawa, Toshiyuki Saito, Junji Ando, Tomoo Suzuki, Hiroyuki Hashitomi, Daigo Yamamoto
  • Patent number: 8513170
    Abstract: A method for producing a solid lubricant includes steps of preparing and coating. A phosphate aqueous solution prepared by the step of preparing is an aqueous solution containing at least one of aluminum dihydrogen phosphate and magnesium dihydrogen phosphate in an amount of 0.5 to 10% by mass. A graphite material is coated with a phosphate using the phosphate aqueous solution. The graphite material is used at a ratio of 40 to 50 parts by mass based on 100 parts by mass of the aqueous solution.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: August 20, 2013
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventors: Masanori Kato, Hiroshi Idei, Akinori Hashimoto
  • Publication number: 20130190216
    Abstract: [Object] A low friction assembly is desired. [Solving Means] The present invention relates to a new low-friction lubrication assembly comprising a first member relatively slidable against a second member, the first member having chemical affinity with an OH-group on its sliding surface; and one or more oxygen containing compounds, provided on the sliding surface of the first member and being able to produce a tribofilm attached to the sliding surface of the first member through hydrogen bond interactions. Preferably the second member comprises a similar OH-terminated sliding surface wherein an oxygen containing compound (lubricant)-supported interface between the first and second sliding surfaces results in a H- and/or OH-terminated interface developing repulsive forces thereinbetween.
    Type: Application
    Filed: March 12, 2013
    Publication date: July 25, 2013
    Inventors: Jean Michel MARTIN, Makoto KANO, Takumaru SAGAWA, Masahiko WATANABE, Yutaka MABUCHI
  • Patent number: 8481464
    Abstract: The present invention relates to a spacer member reducing fretting wear and fastened structures using a spacer member, furthermore, the present invention provides a spacer member 1 sandwiched between contact surfaces 7 of contact materials 6 subject to abrasion and suffering from wear and provided with sliding and vibrating surfaces 2, 2 characterized in that the sliding or vibrating surfaces (2, 2) of the spacer member 1 have a higher hardness than at least one of the contact surfaces (7) of the first contact material (6) and the second contact material (6?) and the sliding or vibrating surfaces (2, 2) of the spacer member 1 have a lower coefficient of friction and a higher flatness than at least one of the contact surfaces (7) of the first contact material (6) and the second contact material (6?), whereby the sliding or vibrating surfaces 2, 2 of the spacer member 1 do not easily wear down the contact surfaces 7 of the contact materials 6.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: July 9, 2013
    Assignee: Imott Corporation
    Inventors: Naoto Ootake, Makoto Matsuo
  • Publication number: 20130130951
    Abstract: Substantially homogenous compositions in accordance with the present disclosure can exist in various forms, such as bulk materials, coatings, films, laminates, inserts, or overlays, and include at least one polymer such as SU-8, at least one liquid lubricant, and optionally at least one nanomaterial that serves as an inorganic filler material. Such compositions exhibit enhanced tribological and mechanical properties compared to the at least one polymer in isolation, for instance, a 50% or greater coefficient of friction reduction, a 100% or greater wear life increase, a 10% or greater elastic modulus increase, and/or a 10% or greater hardness increase. The at least one nanomaterial can include a first nanomaterial providing increased hardness, and a second nanomaterial providing increased elastic modulus. Compositions in accordance with the present disclosure are suitable for biological and non-biological applications.
    Type: Application
    Filed: November 21, 2012
    Publication date: May 23, 2013
    Applicant: National University of Singapore
    Inventor: National University of Singapore
  • Publication number: 20130116157
    Abstract: [Task] Seizure resistance of sliding material based on graphite-added resin is improved. [Means for Solution] A sliding material based on graphite-added resin has composition (1); graphite: average particle diameter of from 5 to 50 ?m, a degree of graphitization of 0.6 or more, the number of graphite particles having a minimum diameter/maximum diameter ratio of 0.5 or more amounts to 50% or more of the total number of the graphite particles observed in a photograph of an optional cross section, content 5 to 60% by weight, as well as composition (2). balance of polyimide resin and/or polyamide-imide resin.
    Type: Application
    Filed: April 7, 2011
    Publication date: May 9, 2013
    Applicant: TAIHO KOGYO CO., LTD.
    Inventors: Ryo Mukai, Hiromi Yokota, Akira Sawamoto, Takao Masamura, Masanori Akizuki
  • Patent number: 8422339
    Abstract: [Object] A low friction assembly is desired. [Solving Means] The present invention relates to a new low-friction lubrication assembly comprising a first member relatively slidable against a second member, the first member having chemical affinity with an OH-group on its sliding surface; and one or more oxygen containing compounds, provided on the sliding surface of the first member and being able to produce a tribofilm attached to the sliding surface of the first member through hydrogen bond interactions. Preferably the second member comprises a similar OH-terminated sliding surface wherein an oxygen containing compound (lubricant)-supported interface between the first and second sliding surfaces results in a H- and/or OH-terminated interface developing repulsive forces thereinbetween.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: April 16, 2013
    Assignees: Nissan Motor Co., Ltd.
    Inventors: Jean Michel Martin, Makoto Kano, Takumaru Sagawa, Masahiko Watanabe, Yutaka Mabuchi
  • Patent number: 8298999
    Abstract: The invention aims at providing a hard coating film excellent in lubrication characteristics; a process for the formation thereof; and tools for the plastic working of metal, and provides a hard coating film covering the surface of a substrate to come into contact with other member, wherein carbon atoms having carbon-carbon bonds are present in an amount of 10 at % or above. It is preferable that the hard coating film contain titanium carbide, while it is preferable to form a titanium nitride coating layer between the surface of the substrate and the hard coating film. The invention also provides a process for the formation of a hard coating film on the surface of a substrate by arc ion plating which comprises introducing a hydrocarbon gas during the arc ion plating with a metal target and which makes it possible to form on the surface of a substrate a coating film where carbon atoms having carbon-carbon bonds are present in an amount of 10 at % or above.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: October 30, 2012
    Assignee: Hitachi Metals, Ltd.
    Inventors: Fumiaki Honda, Ken Inoue, Kenichi Inoue
  • Publication number: 20120270761
    Abstract: [Task] In a sliding member comprising a substrate and a coating layer provided thereon, the coating layer has a sliding surface and is formed of a resin-based coating and particles of a solid lubricant dispersed therein. The orientation ratio of (001) plane of the solid lubricant is enhanced. [Means for Solution] The coating layer of a sliding layer has an average thickness of 3 ?m or less. The particles of the solid lubricant have 2 ?m or more of an average particle diameter as measured by the laser diffraction method. The solid lubricant dispersed has 90% or more of relative C-axis intensity ratio.
    Type: Application
    Filed: March 7, 2011
    Publication date: October 25, 2012
    Applicants: HONDA MOTOR CO., LTD., TAIHO KOGYO CO., LTD.
    Inventors: Soji Kamiya, Tasuku Sakurai
  • Publication number: 20120177915
    Abstract: Provided by the present invention is a lubricating oil composition showing a very low frictional coefficient when used as a lubricating oil for a low friction sliding material prepared by blending with an additive selected from a specific phosphorus-zinc-containing compound and a specific sulfur-containing compound, and a sliding mechanism having an excellent low frictional property in which a DLC film containing 5 to 50 atom % of hydrogen is formed or a sliding mechanism having an excellent low frictional property in which 1 to 30 atom % of tungsten (W) or molybdenum (Mo) is contained is provided by combining the above lubricating oil composition with a sliding member having a film of a specific low frictional sliding material on a sliding face.
    Type: Application
    Filed: September 13, 2010
    Publication date: July 12, 2012
    Applicants: NIPPON ITF INC., IDEMITSU KOSAN CO., LTD.
    Inventors: Moritsugu Kasai, Ryou Yamada, Masanori Tsujioka, Koji Miyake
  • Publication number: 20120088701
    Abstract: A DLC-coated member (100) has a base (200), an intermediate layer (300) that covers the surface of the base (200), and a DLC film (400) that covers the surface of the intermediate layer (300). The intermediate layer (300) has a five-layer structure, constituted of a first intermediate layer (301), a second intermediate layer (302), a third intermediate layer (303), a fourth intermediate layer (304), and a fifth intermediate layer (305). The five layers (301 to 305) are made of DLC to which Si has been added. Among the layers (301 to 305), the Si concentration in the first intermediate layer (301) is the highest, and that in the fifth intermediate layer (305) is the second highest. The Si concentrations in the second intermediate layer (302), third intermediate layer (303), and fourth intermediate layer (304) are lower than those in the first intermediate layer (301) and fifth intermediate layer (305).
    Type: Application
    Filed: October 6, 2011
    Publication date: April 12, 2012
    Applicant: JTEKT CORPORATION
    Inventors: Masahiro SUZUKI, Toshiyuki SAITO, Kazuyoshi YAMAKAWA
  • Publication number: 20110172131
    Abstract: A bearing having a surface and a self-lubricating surface coating composition deposited on the surface, wherein the self-lubricating surface coating composition includes a curable acrylate composition having a metallic composition. The metallic composition having a metallic acrylate compound according to Formula I: The metallic composition further includes a metallic oxide.
    Type: Application
    Filed: March 22, 2011
    Publication date: July 14, 2011
    Applicant: ROLLER BEARING COMPANY OF AMERICA, INC.
    Inventors: Gregg L. Hamel, John H. Cowles, JR., Andrew Henn, Gisele Giguere
  • Patent number: 7968502
    Abstract: The present invention relates to a lubricant for lubricating relatively movable, facing contact surfaces at least one of which is coated with DLC, a method of lubricating DLC contact surfaces with this lubricant, and a system having DLC contact surfaces. The lubricant fulfills the following conditions (a) and (b): (a) the lubricant contains a lubricant base oil containing, as a main component, a base oil composed at least one of a hydrocracked mineral oil, a wax-isomerized mineral oil, and a poly-?-olefin base oil. The base oil has a kinematic viscosity of 2 to 20 mm2/s at 100° C., a total aromatic content of not higher than 5 mass %, and a sulfur content of 0.005 mass %; and (b) the lubricant has a sulfur content of not higher than 0.2 mass %.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: June 28, 2011
    Assignees: Nippon Oil Corporation, Nissan Motor Co., Ltd.
    Inventors: Shozaburo Konishi, Makoto Kano, Takafumi Ueno, Takao Ishikawa
  • Publication number: 20110143976
    Abstract: Provided is a nitrogen-containing amorphous carbon film exhibiting excellent durability even when formed on the surface of a sliding member used under high surface pressure or under a lubricating oil environment. The nitrogen-containing amorphous carbon film is formed by physical evaporation onto the sliding surface of a sliding member and contains 8.0 to 12.0 atomic % of hydrogen and 3.0 to 14.0 atomic % of nitrogen. The nitrogen-containing amorphous carbon film is effective when, for instance, formed on at least one sliding surface of a sliding member, such as a sliding part of an automobile engine.
    Type: Application
    Filed: August 12, 2009
    Publication date: June 16, 2011
    Applicant: Kabushiki Kaisha Kobe Seiko Sho(Kobe Steel , Ltd.)
    Inventors: Hirotaka Ito, Kenji Yamamoto
  • Publication number: 20110142384
    Abstract: The invention relates to a sliding element that includes a carrier body and a multiple layer. The multiple layer includes a running layer and a protective layer, in which the protective layer has a hardness HUplast of greater than 5 GPa, and the hardness of the running layer is less than 400 HV.
    Type: Application
    Filed: August 13, 2009
    Publication date: June 16, 2011
    Inventor: Dieter Hofmann
  • Patent number: 7951756
    Abstract: The present invention relates to a system wherein a pair of relatively movable, facing DLC contact surfaces at least one of which is coated with a DLC film, are further lowered in friction, and the low friction property is stably maintained. The present invention also relates to a lubricant for the system, and a lubricating method. The lubricant for the system having the DLC contact surfaces contains lubricant base oil (A) mainly composed of base oil (X), and sulfur-containing molybdenum complex (B). The base oil (X) is at least one of hydrocracked mineral oils, wax-isomerized mineral oils, and poly-?-olefin base oils, and has a kinematic viscosity of 2 to 20 mm2/s at 100° C., a total aromatic content of not higher than 5 mass %, and a total sulfur content of not higher than 0.005 mass %.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: May 31, 2011
    Assignees: Nippon Oil Corporation, Nissan Motor Co., Ltd.
    Inventors: Shozaburo Konishi, Makoto Kano, Takafumi Ueno, Takao Ishikawa
  • Publication number: 20110028361
    Abstract: A low-friction sliding mechanism includes first and second sliding members having respective sliding surfaces slidable relative to each other and a lubricant applied to the sliding surfaces of the first and second sliding members. At least the sliding surface of the first sliding member is made of a diamond-like carbon material, and at least the sliding surface of the second sliding member is made of either an aluminum-based alloy material, a magnesium-based alloy material or a diamond-like carbon material. The lubricant contains a base oil and at least one of an ashless fatty-ester friction modifier and an ashless aliphatic-amine friction modifier.
    Type: Application
    Filed: July 13, 2010
    Publication date: February 3, 2011
    Inventors: Shozaburo Konishi, Makoto Kano, Yoshiteru Yasuda, Yutaka Mabuchi, Takahiro Hamada, Shigeki Takeshima, Kenji Tsushima
  • Patent number: 7833626
    Abstract: An amorphous carbon film includes carbon as a major component, and silicon in an amount of from 0.1 atomic % or more to 10 atomic % or less when the entire amorphous carbon film is taken as 100 atomic %. The carbon is composed of carbon having an sp2 hybrid orbital in an amount of from 60 atomic % or more to 90 atomic % or less when the entire carbon amount is taken as 100 atomic %. Also disclosed is a process for producing the amorphous carbon film.
    Type: Grant
    Filed: November 24, 2005
    Date of Patent: November 16, 2010
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Takashi Iseki, Hideo Tachikawa, Hiroyuki Mori, Kazuyuki Nakanishi, Munehisa Matsui, Shintaro Igarashi, Fumio Shimizu, Yoshinari Tsuchiya, Tadashi Oshima
  • Publication number: 20100267595
    Abstract: A component having a layer system situated on the component is described, for increasing the resistance to wear of the component. The layer system in this context includes a phosphate layer and particles of solid lubricants, the layer system being free of any binding agent. A method for producing such a component is also described.
    Type: Application
    Filed: September 25, 2008
    Publication date: October 21, 2010
    Inventors: Andreas Vogt, Thomas Kleinbeck
  • Publication number: 20100197533
    Abstract: The invention relates to thermally conductive greases that may contain carrier oil(s), dispersant(s), and thermally conductive particles, wherein the thermally conductive particles are a mixture of at least three distributions of thermally conductive particles, each of the at least three distributions of thermally conductive particles having an average (D50) particle size which differs from the other average particle sizes by at least a factor of five. The thermally conductive greases of the invention exhibit desirable rheological behavior during installation/application and during use of devices involving these materials.
    Type: Application
    Filed: August 15, 2007
    Publication date: August 5, 2010
    Applicant: 3M Innovative Properties Company
    Inventors: Philip E. Kendall, Ravi K. Sura
  • Patent number: 7691791
    Abstract: A lubricant molded body, which is to be applied to a surface of a photosensitive layer for electrophotography in an image forming apparatus, for example, is composed of at least two kinds of higher fatty acid metallic salts having respectively different carbon numbers. As the higher fatty acid metallic salt that forms lubricant molded body, compounds such as zinc stearate, calcium stearate, barium stearate, aluminum stearate, zinc laurate, calcium laurate, etc. may be recited. The higher fatty acid metallic salts may contain at least one kind of fillers selected from the group consisting of silica, alumina, tungsten disulfide, molybdenum disulfide, graphite fluoride, graphite, boron nitride, polytetrafluoroethylene (PTFE), ethylene tetrafluoroethylene (ETFE), and polyvinylidene fluoride (PVDF).
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: April 6, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Joe Usami
  • Patent number: 7650976
    Abstract: A low-friction sliding member in a transmission is at least one of sliding members which are in slidable contact with each other in presence of a transmission oil composition. The low-friction sliding member includes a base material having a sliding section. A hard carbon thin film is coated at a sliding surface of the sliding section of the base material. The hard carbon thin film contains hydrogen in an amount not more than 20 atomic %. The transmission oil composition contains at least one of organic oxygen-containing compound and aliphatic amine compound.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: January 26, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takao Ishikawa, Kiyotaka Nakamura, Makoto Kano, Takafumi Ueno
  • Publication number: 20090311476
    Abstract: The invention describes a component unit comprising at least one component (3), in particular a molded component (4), made from a powder or powder mixture containing metallic and optionally non-metallic components produced by compressing this powder or powder mixture, followed by sintering. At least one surface portion (12) of the component (3) which co-operates with another surface portion (13) of another component (14, 22) when pressure force acting between the two surface portions (12, 13) is applied is coated with an anti-friction varnish (2). The invention further relates to a method of producing such a component (3, 14, 22) with the anti-friction varnish (2).
    Type: Application
    Filed: October 10, 2006
    Publication date: December 17, 2009
    Inventors: Gerold Stetina, Christian Sandner, Raimund Ratzi
  • Publication number: 20090220780
    Abstract: A tubular threaded element including a dry protective coating. The coating includes a solid matrix adhering to the substrate in which are dispersed particles of solid lubricants from at least two classes that are selected to exert a synergistic effect between themselves and with the constituents of the matrix, i.e. coating provides protection against corrosion and against galling of the threadings of threaded elements used in hydrocarbon wells.
    Type: Application
    Filed: October 4, 2006
    Publication date: September 3, 2009
    Applicants: Vallourec Mannesmann Oil & Gas France, Sumitomo Metal Industries, Ltd.
    Inventors: Laurent Bordet, Laurent Gillot, Eliette Pinel, Eric Gard
  • Publication number: 20090118148
    Abstract: [Summary] [Object] To provide a low-friction sliding mechanism capable of exhibiting an extremely excellent ultra-low friction characteristics at a sliding face existing in a variety of uses. [Solving means] A low-friction sliding mechanism is constituted by disposing a lubricant containing glycerol, at a sliding face formed between sliding members which have respectively hard carbon thin films. A low-friction sliding mechanism is constituted by disposing a lubricant containing hydroxyl group, at a sliding face formed between sliding members which have respectively hard carbon thin films, wherein a friction coefficient of smaller than 0.02 is exhibited in a sliding contacting condition under a boundary lubrication which exhibits a friction coefficient of 0.1 to 0.14 at a sliding face between a steel and a steel in presence of an engine oil. Each hard carbon thin film is formed of a-C or ta-C. Each hard carbon thin film has a hardness of 1500 to 5000 Hv in micro-Vickers hardness under a load of 10 g.
    Type: Application
    Filed: April 2, 2007
    Publication date: May 7, 2009
    Inventors: Jean Michel Martin, Makoto Kano, Takumaru Sagawa, Masahiko Watanabe
  • Publication number: 20090054277
    Abstract: There is provided a sliding member including a base body and a hard carbon coating formed on the base body to define a sliding surface for sliding contact with an opposing member under lubrication according to one embodiment of the present invention. The hard carbon coating has an outermost surface portion lower in hydrogen content than a remaining portion thereof, or an outermost coating layer lower in hydrogen content than at least one other coating layer.
    Type: Application
    Filed: October 22, 2008
    Publication date: February 26, 2009
    Inventors: Takahiro HAMADA, Makoto Kano, Yutaka Mabuchi
  • Patent number: 7441302
    Abstract: A wiper blade (1) includes a base portion (3) to be attached to a wiper arm, a lip portion (4) to sweep away a water droplet or dust etc. adhered to a glass window, a thin neck portion (2) for connecting the lip portion (4) and the base portion (3), and a sweeping surface layer portion formed on a side surface of a cross section of the lip portion (4), with the sweeping surface layer (7) including a scale-like powder (9) having a good sliding property and a binder (10) including a water-repellency silicone-base rubber composition for binding the scale-like powder (9) to the lip portion (4). The scale-like powder (9) is laminated in a thickness direction of the lip portion (4) and the laminated scale-like powder is bound to each other with the binder (10).
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: October 28, 2008
    Assignee: Shin-Etsu Polymer Co., Ltd.
    Inventors: Nobuyuki Hiruma, Masahide Takahashi, Yoshinari Shizukuda
  • Publication number: 20080167206
    Abstract: A low-friction sliding mechanism includes first and second sliding members having respective sliding surfaces slidable relative to each other and a lubricant applied to the sliding surfaces of the first and second sliding members. At least the sliding surface of the first sliding member is made of a diamond-like carbon material, and at least the sliding surface of the second sliding member is made of either an aluminum-based alloy material, a magnesium-based alloy material or a diamond-like carbon material. The lubricant contains a base oil and at least one of an ashless fatty-ester friction modifier and an ashless aliphatic-amine friction modifier.
    Type: Application
    Filed: December 13, 2007
    Publication date: July 10, 2008
    Inventors: Shozaburo KONISHI, Makoto Kano, Yoshiteru Yasuda, Yutaka Mabuchi, Takahiro Hamada, Shigeki Takeshima, Kenji Tsushima
  • Publication number: 20080146468
    Abstract: The present invention relates to a lubricant for lubricating relatively movable, facing contact surfaces at least one of which is coated with DLC, a method of lubricating DLC contact surfaces with this lubricant, and a system having DLC contact surfaces. The lubricant fulfills the following conditions (a) and (b): (a) the lubricant contains a lubricant base oil containing, as a main component, a base oil composed at least one of a hydrocracked mineral oil, a wax-isomerized mineral oil, and a poly-?-olefin base oil. The base oil has a kinematic viscosity of 2 to 20 mm2/s at 100° C., a total aromatic content of not higher than 5 mass %, and a sulfur content of 0.005 mass %; and (b) the lubricant has a sulfur content of not higher than 0.2 mass %.
    Type: Application
    Filed: August 6, 2004
    Publication date: June 19, 2008
    Applicants: Nippon Oil Corporation, Nissan Motor Co., LTD
    Inventors: Shozaburo Konishi, Makoto Kano, Takafumi Ueno, Takao Ishikawa
  • Patent number: 7354887
    Abstract: A high temperature liquid crystalline polyester (LCP) composition, and articles made therefrom, that provides “good” to “excellent” wear resistance at PVs (pressure×velocity) of at least 1.75 MPa-m/s (50,000 psi-fpm). The high temperature LCP being a matrix material containing lubricating fillers and having an onset of melting temperature of at least 320° C.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: April 8, 2008
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Joy Sawyer Bloom
  • Publication number: 20080076684
    Abstract: A low-friction sliding mechanism includes a pair of sliding members having respective sliding surfaces slidable relative to each other and an ionic liquid applied to the respective sliding surfaces. At least one of the sliding surfaces has a coating of either a diamond-like carbon material, a diamond material or a combination thereof. The ionic liquid consists of cation and anion components and exists in liquid or gel form at room temperature.
    Type: Application
    Filed: September 19, 2007
    Publication date: March 27, 2008
    Inventors: Toshikazu NANBU, Yoshiteru Yasuda, Takafumi Ueno, Tokio Sakane, Toshihiro Takekawa
  • 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