Graphite, Coal, Or Elemental Carbon Patents (Class 508/109)
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Patent number: 11976689Abstract: A sliding member includes a metallic substrate, a porous layer formed on a surface of the metallic substrate, and a sliding layer that covers the porous layer. The porous layer is made of a metal itself or an alloy composition. The sliding layer is made of a lead-free resin composition. The resin composition contains an essential additive, optionally an optional additive, and a fluororesin. The essential additive is any one of a combination of a zinc compound and a carbon fiber, a combination of a zinc compound and an iron oxide, and a combination of a zinc compound, a carbon fiber and an iron oxide. A total content of the essential additive and the optional additive is 10 vol % or more and 35 vol % or less in the resin composition.Type: GrantFiled: June 11, 2020Date of Patent: May 7, 2024Assignee: Senju Metal Industry Co., Ltd.Inventors: Kimihiko Kurosaki, Kenzo Tadokoro, Minoru Toyoda
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Patent number: 11876030Abstract: There are provided a clad material and a method for producing the same, the clad material being capable of preventing cracks from being formed and preventing the separation of layers thereof from being caused, even if it is punched by press-working (even if a high shearing force is applied thereto by thermal shock. After each of Mo—Cu layers 10, which has a metal film 10a of a metal selected from the group consisting of Co, Ti, Pd, Pt and Ni on at least one side thereof is arranged on a corresponding one of both sides of a Cu-graphite layer 12, which is obtained by sintering a graphite powder having a Cu film on the surface thereof, so as to allow the metal film 10a to contact the Cu-graphite layer 12, the layers are heated while a pressure is applied between the Cu-graphite layer 12 and the Mo—Cu layers 10.Type: GrantFiled: December 3, 2018Date of Patent: January 16, 2024Assignees: DOWA HOLDINGS CO., LTD., THE GOODSYSTEM CORPORATIONInventors: Tomotsugu Aoyama, Hiroto Narieda, Ilho Kim, Meoung whan Cho
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Patent number: 10634249Abstract: 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: GrantFiled: August 10, 2015Date of Patent: April 28, 2020Assignees: Nippon ITF, Inc., Honda Motor Co., Ltd.Inventors: Takehiko Ooshiro, Koji Miyake, Masanori Tsujioka, Satoshi Yoshida
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Patent number: 9803273Abstract: 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: GrantFiled: April 30, 2014Date of Patent: October 31, 2017Assignees: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., H-O-T HAERTE- UND OBERFLAECHENTECHNIK GMBH & CO. KGInventors: Andreas Leson, Hans-Joachim Scheibe, Frank-Peter Bach
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Publication number: 20150148271Abstract: 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: ApplicationFiled: June 5, 2013Publication date: May 28, 2015Inventors: Hannes Golob, Thomas Walter, Dorit Pitz, Martin Muller-Brodmann, Martin Pitz, Achim Schmidt
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Publication number: 20150125101Abstract: 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: ApplicationFiled: May 9, 2013Publication date: May 7, 2015Inventor: Roohollah Kachoosangi
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Publication number: 20150072906Abstract: 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: ApplicationFiled: March 29, 2013Publication date: March 12, 2015Applicant: NISSAN MOTOR CO., LTD.Inventors: Makoto Hayama, Terasu Yoshinari, Masanori Komaba, Yutaka Mabuchi, Yoshiteru Yasuda, Saburo Abe, Katsuyuki Serizawa, Tsuyoshi Higuchi
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Patent number: 8911875Abstract: 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: GrantFiled: November 23, 2009Date of Patent: December 16, 2014Assignee: Federal-Mogul Burscheid GmbHInventors: Marcus Kennedy, Michael Zinnabold, Marc-Manuel Matz
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Publication number: 20140349898Abstract: 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: ApplicationFiled: October 30, 2012Publication date: November 27, 2014Applicant: TAIHO KOGYO CO., Ltd.Inventors: Kyohei Yamane, Shingo Goto
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Patent number: 8895488Abstract: 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: GrantFiled: November 17, 2011Date of Patent: November 25, 2014Assignee: Honda Motor Co., LtdInventor: Kentaro Komori
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Patent number: 8846590Abstract: 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: GrantFiled: March 26, 2004Date of Patent: September 30, 2014Assignee: Infineum International LimitedInventor: Rebecca Castle
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Publication number: 20140079910Abstract: 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: ApplicationFiled: May 10, 2012Publication date: March 20, 2014Inventors: Kazuo Tsugawa, Shunsuke Kawaki, Masatou Ishihara, Yoshinori Koga, Masataka Hasegawa, Jaeho Kim
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Publication number: 20140024563Abstract: 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: ApplicationFiled: July 23, 2013Publication date: January 23, 2014Inventors: Matthew J. Heidecker, Jean-Luc M. Caillat
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Publication number: 20140005083Abstract: 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: ApplicationFiled: June 13, 2013Publication date: January 2, 2014Applicant: NanoMech, Inc.Inventor: Ajay P. Malshe
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Publication number: 20140005084Abstract: 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: ApplicationFiled: May 10, 2012Publication date: January 2, 2014Applicant: Evonik Oil Additives GmbHInventors: Boris Eisenberg, Torsten Stoehr
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Patent number: 8575076Abstract: 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: GrantFiled: October 22, 2008Date of Patent: November 5, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Takahiro Hamada, Makoto Kano, Yutaka Mabuchi
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Patent number: 8557749Abstract: 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: GrantFiled: October 27, 2005Date of Patent: October 15, 2013Assignee: SGL Carbon SEInventors: Thomas Metzinger, Adi Woizenko
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Publication number: 20130252859Abstract: 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: ApplicationFiled: February 18, 2013Publication date: September 26, 2013Inventors: Sundeep Gopagoni, Thomas W. Scharf, Rajarshi Banerjee, Jaimie S. Tiley
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Patent number: 8518862Abstract: 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: GrantFiled: November 28, 2006Date of Patent: August 27, 2013Assignee: NGK Spark Plug Co., Ltd.Inventors: Akiyoshi Kato, Naoki Yamada, Noboru Fujita, Takuya Takase
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Patent number: 8518863Abstract: 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: GrantFiled: February 17, 2010Date of Patent: August 27, 2013Assignees: JTEKT Corporation, CNK Co., Ltd.Inventors: Masahiro Suzuki, Kazuyoshi Yamakawa, Toshiyuki Saito, Junji Ando, Tomoo Suzuki, Hiroyuki Hashitomi, Daigo Yamamoto
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Patent number: 8513170Abstract: 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: GrantFiled: October 15, 2010Date of Patent: August 20, 2013Assignee: Akebono Brake Industry Co., Ltd.Inventors: Masanori Kato, Hiroshi Idei, Akinori Hashimoto
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Publication number: 20130190216Abstract: [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: ApplicationFiled: March 12, 2013Publication date: July 25, 2013Inventors: Jean Michel MARTIN, Makoto KANO, Takumaru SAGAWA, Masahiko WATANABE, Yutaka MABUCHI
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Patent number: 8481464Abstract: 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: GrantFiled: May 23, 2008Date of Patent: July 9, 2013Assignee: Imott CorporationInventors: Naoto Ootake, Makoto Matsuo
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Publication number: 20130130951Abstract: 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: ApplicationFiled: November 21, 2012Publication date: May 23, 2013Applicant: National University of SingaporeInventor: National University of Singapore
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Publication number: 20130116157Abstract: [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: ApplicationFiled: April 7, 2011Publication date: May 9, 2013Applicant: TAIHO KOGYO CO., LTD.Inventors: Ryo Mukai, Hiromi Yokota, Akira Sawamoto, Takao Masamura, Masanori Akizuki
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Patent number: 8422339Abstract: [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: GrantFiled: April 27, 2007Date of Patent: April 16, 2013Assignees: Nissan Motor Co., Ltd.Inventors: Jean Michel Martin, Makoto Kano, Takumaru Sagawa, Masahiko Watanabe, Yutaka Mabuchi
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Patent number: 8298999Abstract: 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: GrantFiled: December 21, 2007Date of Patent: October 30, 2012Assignee: Hitachi Metals, Ltd.Inventors: Fumiaki Honda, Ken Inoue, Kenichi Inoue
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Publication number: 20120270761Abstract: [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: ApplicationFiled: March 7, 2011Publication date: October 25, 2012Applicants: HONDA MOTOR CO., LTD., TAIHO KOGYO CO., LTD.Inventors: Soji Kamiya, Tasuku Sakurai
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Publication number: 20120177915Abstract: 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: ApplicationFiled: September 13, 2010Publication date: July 12, 2012Applicants: NIPPON ITF INC., IDEMITSU KOSAN CO., LTD.Inventors: Moritsugu Kasai, Ryou Yamada, Masanori Tsujioka, Koji Miyake
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Publication number: 20120088701Abstract: 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: ApplicationFiled: October 6, 2011Publication date: April 12, 2012Applicant: JTEKT CORPORATIONInventors: Masahiro SUZUKI, Toshiyuki SAITO, Kazuyoshi YAMAKAWA
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Publication number: 20110172131Abstract: 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: ApplicationFiled: March 22, 2011Publication date: July 14, 2011Applicant: ROLLER BEARING COMPANY OF AMERICA, INC.Inventors: Gregg L. Hamel, John H. Cowles, JR., Andrew Henn, Gisele Giguere
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Patent number: 7968502Abstract: 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: GrantFiled: August 6, 2004Date of Patent: June 28, 2011Assignees: Nippon Oil Corporation, Nissan Motor Co., Ltd.Inventors: Shozaburo Konishi, Makoto Kano, Takafumi Ueno, Takao Ishikawa
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Publication number: 20110142384Abstract: 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: ApplicationFiled: August 13, 2009Publication date: June 16, 2011Inventor: Dieter Hofmann
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Publication number: 20110143976Abstract: 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: ApplicationFiled: August 12, 2009Publication date: June 16, 2011Applicant: Kabushiki Kaisha Kobe Seiko Sho(Kobe Steel , Ltd.)Inventors: Hirotaka Ito, Kenji Yamamoto
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Patent number: 7951756Abstract: 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: GrantFiled: August 6, 2004Date of Patent: May 31, 2011Assignees: Nippon Oil Corporation, Nissan Motor Co., Ltd.Inventors: Shozaburo Konishi, Makoto Kano, Takafumi Ueno, Takao Ishikawa
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Publication number: 20110028361Abstract: 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: ApplicationFiled: July 13, 2010Publication date: February 3, 2011Inventors: Shozaburo Konishi, Makoto Kano, Yoshiteru Yasuda, Yutaka Mabuchi, Takahiro Hamada, Shigeki Takeshima, Kenji Tsushima
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Patent number: 7833626Abstract: 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: GrantFiled: November 24, 2005Date of Patent: November 16, 2010Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takashi Iseki, Hideo Tachikawa, Hiroyuki Mori, Kazuyuki Nakanishi, Munehisa Matsui, Shintaro Igarashi, Fumio Shimizu, Yoshinari Tsuchiya, Tadashi Oshima
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Publication number: 20100267595Abstract: 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: ApplicationFiled: September 25, 2008Publication date: October 21, 2010Inventors: Andreas Vogt, Thomas Kleinbeck
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Publication number: 20100197533Abstract: 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: ApplicationFiled: August 15, 2007Publication date: August 5, 2010Applicant: 3M Innovative Properties CompanyInventors: Philip E. Kendall, Ravi K. Sura
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Patent number: 7691791Abstract: 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: GrantFiled: November 22, 2006Date of Patent: April 6, 2010Assignee: Ricoh Company, Ltd.Inventor: Joe Usami
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Patent number: 7650976Abstract: 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: GrantFiled: November 28, 2007Date of Patent: January 26, 2010Assignee: Nissan Motor Co., Ltd.Inventors: Takao Ishikawa, Kiyotaka Nakamura, Makoto Kano, Takafumi Ueno
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Publication number: 20090311476Abstract: 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: ApplicationFiled: October 10, 2006Publication date: December 17, 2009Inventors: Gerold Stetina, Christian Sandner, Raimund Ratzi
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Publication number: 20090220780Abstract: 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: ApplicationFiled: October 4, 2006Publication date: September 3, 2009Applicants: Vallourec Mannesmann Oil & Gas France, Sumitomo Metal Industries, Ltd.Inventors: Laurent Bordet, Laurent Gillot, Eliette Pinel, Eric Gard
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Publication number: 20090118148Abstract: [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: ApplicationFiled: April 2, 2007Publication date: May 7, 2009Inventors: Jean Michel Martin, Makoto Kano, Takumaru Sagawa, Masahiko Watanabe
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Publication number: 20090054277Abstract: 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: ApplicationFiled: October 22, 2008Publication date: February 26, 2009Inventors: Takahiro HAMADA, Makoto Kano, Yutaka Mabuchi
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Patent number: 7441302Abstract: 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: GrantFiled: June 27, 2002Date of Patent: October 28, 2008Assignee: Shin-Etsu Polymer Co., Ltd.Inventors: Nobuyuki Hiruma, Masahide Takahashi, Yoshinari Shizukuda
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Publication number: 20080167206Abstract: 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: ApplicationFiled: December 13, 2007Publication date: July 10, 2008Inventors: Shozaburo KONISHI, Makoto Kano, Yoshiteru Yasuda, Yutaka Mabuchi, Takahiro Hamada, Shigeki Takeshima, Kenji Tsushima
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Publication number: 20080146468Abstract: 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: ApplicationFiled: August 6, 2004Publication date: June 19, 2008Applicants: Nippon Oil Corporation, Nissan Motor Co., LTDInventors: Shozaburo Konishi, Makoto Kano, Takafumi Ueno, Takao Ishikawa
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Patent number: 7354887Abstract: 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: GrantFiled: September 10, 2003Date of Patent: April 8, 2008Assignee: E. I. du Pont de Nemours and CompanyInventor: Joy Sawyer Bloom
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Publication number: 20080076684Abstract: 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: ApplicationFiled: September 19, 2007Publication date: March 27, 2008Inventors: Toshikazu NANBU, Yoshiteru Yasuda, Takafumi Ueno, Tokio Sakane, Toshihiro Takekawa