Patents by Inventor Mamoru Tohyama
Mamoru Tohyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170247625Abstract: [Technical Problem] An object is to provide a sliding system which can achieve both the reduced friction and the enhanced wear resistance by means of a novel combination of a sliding film and a lubricant oil. [Solution to Problem] The sliding system of the present invention comprises: a pair of sliding members having sliding surfaces that can relatively move while facing each other; and a lubricant oil interposed between the sliding surfaces facing each other. At least one of the sliding surfaces comprises a coating surface of a crystalline chromium carbide film. The lubricant oil contains an oil-soluble molybdenum compound that has a chemical structure of a trinuclear of Mo. When the chromium carbide film as a whole is 100 at %, the chromium carbide film contains 40-75 at % of Cr.Type: ApplicationFiled: January 27, 2017Publication date: August 31, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki MORI, Mamoru TOHYAMA, Masaru OKUYAMA, Keiji HAYASHI, Naoya IKEDA
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Patent number: 9624975Abstract: The sliding member according to the present invention includes: a base material; and a sliding film that covers a surface of the base material and constitutes a sliding surface, and is used under a wet condition where lubricant oil exists. The sliding film according to the present invention is a laminated film that includes: an underlying layer formed on the surface of the base material; and an outermost layer formed at least on a part of the underlying layer. This outermost layer is characterized by including specific boron-containing amorphous carbon (specific B-DLC) that contains 4-50% B and 5-50% H when the outermost layer as a whole is 100 at %. This specific B-DLC itself wears away during the sliding to smooth the sliding surface, and an excellent low friction property is exhibited. The underlying layer of the specific B-DLC contributes to improvement in the wear resistance property of the sliding film.Type: GrantFiled: March 11, 2015Date of Patent: April 18, 2017Assignees: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaru Okuyama, Mamoru Tohyama, Hiroyuki Mori, Munehisa Matsui, Naoya Ikeda, Yoshio Fuwa, Takatoshi Shinyoshi
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Publication number: 20160115414Abstract: [Technical Problem] An object is to provide a sliding system which can drastically reduce the friction coefficient on a sliding portion by means of a novel combination of a chromium nitride film and a lubricant oil. [Solution to Problem] The sliding system according to the present invention includes: a pair of sliding members having sliding surfaces that can relatively move while facing each other; and a lubricant oil that can be interposed between the sliding surfaces facing each other. At least one of the sliding surfaces is formed as a coating surface of a chromium nitride film, and the lubricant oil contains an oil-soluble molybdenum compound that has a chemical structure of a trinuclear of Mo.Type: ApplicationFiled: July 10, 2015Publication date: April 28, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki MORI, Mamoru TOHYAMA, Masaru OKUYAMA, Keiji HAYASHI, Naoya IKEDA
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Publication number: 20160010021Abstract: A sliding machine includes: a pair of sliding members having sliding surfaces that oppose each other and are able to move relative to each other; and a lubricating oil which is able to be interposed between the opposed sliding surfaces, in which at least one of the sliding surfaces is covered with a chromium (Cr)-containing amorphous carbon film (chromium-coating DLC), and the lubricating oil contains an oil-soluble molybdenum compound having a chemical structure formed from a trinuclear material of molybdenum (Mo). Specifically, the chromium-coating DLC contains, when the entirety of the film is assumed to be 100 at. %, 1% to 49% of Cr, 0% to 30% of hydrogen (H), carbon (C) as a remainder, and impurities. The lubricating oil contains 5 ppm to 800 ppm of the oil-soluble molybdenum compound in terms of Mo mass ratio with respect to the entirety of the lubricating oil.Type: ApplicationFiled: July 9, 2015Publication date: January 14, 2016Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki MORI, Mamoru TOHYAMA, Masaru OKUYAMA, Keiji HAYASHI, Naoya IKEDA
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Publication number: 20160001259Abstract: A material for trapping a target substance, which is capable of selectively trapping a target substance such as a sludge or a sludge precursor contained in a liquid organic compound such as an engine oil or in a gas such as a blow-by gas (combustion gas). A material for trapping a target substance, which traps a target substance contained in a liquid organic compound or a gas, the material comprising a mesoporous inorganic material having a plurality of pores.Type: ApplicationFiled: September 11, 2015Publication date: January 7, 2016Inventors: Yasuhiro OHMIYA, Mamoru TOHYAMA, Hiroshi MORITANI, Narihito TATSUDA, Kazuhisa YANO, Kenichi HARADA, Ippei FUKUTOMI, Motoichi MURAKAMI, Norio INAMI, Ryuji KOIKE
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Publication number: 20150267746Abstract: The sliding member according to the present invention includes: a base material; and a sliding film that covers a surface of the base material and constitutes a sliding surface, and is used under a wet condition where lubricant oil exists. The sliding film according to the present invention is a laminated film that includes: an underlying layer formed on the surface of the base material; and an outermost layer formed at least on a part of the underlying layer. This outermost layer is characterized by including specific boron-containing amorphous carbon (specific B-DLC) that contains 4-50% B and 5-50% H when the outermost layer as a whole is 100 at %. This specific B-DLC itself wears away during the sliding to smooth the sliding surface, and an excellent low friction property is exhibited. The underlying layer of the specific B-DLC contributes to improvement in the wear resistance property of the sliding film.Type: ApplicationFiled: March 11, 2015Publication date: September 24, 2015Inventors: Masaru OKUYAMA, Mamoru TOHYAMA, Hiroyuki MORI, Munehisa MATSUI, Naoya IKEDA, Yoshio FUWA, Takatoshi SHINYOSHI
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Publication number: 20150166925Abstract: A lubricating oil according to the present invention is a lubricating oil used in a friction-type driving force transmission apparatus, the lubricating oil including: at least one of two additives; a first additive selected from at least one of an aliphatic amine having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 1) and an aliphatic amine ethylene oxide adduct having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 2); and a second additive selected from at least one of a phosphorous acid diester having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 3) and a phosphorous acid monoester having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 4).Type: ApplicationFiled: December 17, 2014Publication date: June 18, 2015Applicants: JTEKT Corporation, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hiroyuki ANDO, Junji Ando, Kazutaka Matsukawa, Toshimi Hara, Mototake Furuhashi, Mamoru Tohyama, Toshihide Ohmori, Yasuo Esaki, Chihiro Kanzawa, Keiko Fukumoto
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Publication number: 20150083655Abstract: Provided is an oil deterioration prevention device with which the trapping effect with respect to oil deteriorated components can be improved and with which the oil passage resistance can be reduced, thereby suppressing a rise in pressure loss. This oil deterioration prevention device is equipped with a filter unit equipped with a filter material that filters oil; and a deterioration prevention unit equipped with a powdery deterioration suppressing agent that suppresses oil deterioration. The deterioration prevention unit contains a mesoporous inorganic material, and of the oil fed from an oil storage unit, the oil filtered by the filter unit is fed to parts which are to be lubricated, and the oil in which deterioration has been suppressed by the deterioration prevention unit is returned to the oil storage unit or is fed to the parts to be lubricated.Type: ApplicationFiled: April 30, 2013Publication date: March 26, 2015Applicants: TOYOTA BOSHOKU KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hideto Morishita, Yasuhiro Saito, Ippei Fukutomi, Motoichi Murakami, Katsuichi Miyasaka, Yasuhiro Ohmiya, Hiroshi Moritani, Mamoru Tohyama, Narihito Tatsuda
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Publication number: 20130292318Abstract: An oil deterioration suppressing apparatus. The apparatus includes a filtering portion including a filter element for filtering oil; and a deterioration suppressing portion including powdery deterioration retarder which suppresses deterioration of oil. The deterioration suppressing portion includes a flow passage wall which holds the deterioration retarder and forms an oil flow passage, and the deterioration retarder includes mesoporous inorganic material.Type: ApplicationFiled: April 18, 2013Publication date: November 7, 2013Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Hideto MORISHITA, Yasuhiro SAITO, Ippei FUKUTOMI, Motoichi MURAKAMI, Katsuichi MIYASAKA, Yasuhiro OHMIYA, Hiroshi MORITANI, Mamoru TOHYAMA, Narihito TATSUDA
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Publication number: 20120312731Abstract: A material for trapping a target substance, which is capable of selectively trapping a target substance such as a sludge or a sludge precursor contained in a liquid organic compound such as an engine oil or in a gas such as a blow-by gas (combustion gas). A material for trapping a target substance, which traps a target substance contained in a liquid organic compound or a gas, the material including a mesoporous inorganic material having a plurality of pores.Type: ApplicationFiled: January 27, 2011Publication date: December 13, 2012Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Yasuhiro Ohmiya, Mamoru Tohyama, Hiroshi Moritani, Narihito Tatsuda, Kazuhisa Yano, Kenichi Harada, Ippei Fukutomi, Motoichi Murakami, Norio Inami, Ryuji Koike
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Publication number: 20120270693Abstract: A lubricating oil used in a friction-type drive power transmission apparatus which includes: at least one of two additives; a first additive selected from at least one of an aliphatic amine having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 1) and an aliphatic amine ethylene oxide adduct having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 2).Type: ApplicationFiled: November 19, 2010Publication date: October 25, 2012Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, JTEKT CorporationInventors: Hiroyuki Ando, Junji Ando, Kazutaka Matsukawa, Toshimi Hara, Mototake Furuhashi, Mamoru Tohyama, Toshihide Ohmori, Yasuo Esaki, Chihiro Kanzawa, Keiko Fukumoto
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Publication number: 20100267506Abstract: The invention provides a sliding material for use in a wet-type continuously variable transmission, the sliding material including a resin as a matrix and mesophase pitch carbon fibers, the mesophase pitch carbon fibers being included in the sliding material at a content ratio of from 1% by volume to 60% by volume.Type: ApplicationFiled: November 26, 2008Publication date: October 21, 2010Inventors: Hiroyuki Murase, Atsushi Suzuki, Masaru Okuyama, Mamoru Tohyama, Toshihide Ohmori
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Patent number: 7537835Abstract: Under wet sliding conditions using drivetrain system lubricating oils, a high frictional sliding member exhibiting a high friction coefficient, a favorable ??v characteristic stably, excellent wear resistance, and low mating-member aggressiveness is provided. The present invention is a wet sliding member comprising: a substrate composed of metal, ceramics, or resin; and an amorphous hard carbon film formed integrally on a surface of the substrate, having a surface, at least a part of which is turned into a sliding surface for sliding under wet conditions, and containing at least either one of Si and N in an amount of from 1 to 50 atomic %.Type: GrantFiled: September 25, 2002Date of Patent: May 26, 2009Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Hiroyuki Mori, Hideo Tachikawa, Masaru Okuyama, Mamoru Tohyama, Toshihide Ohmori, Kazuyuki Nakanishi
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Patent number: 7368168Abstract: A low-friction sliding member is used under a wet condition employing a lubricant, and includes a substrate having a surface, and an amorphous hard carbon film formed on the surface of the substrate for contacting slidably with a mating member. The amorphous hard carbon film includes silicon in an amount of from 1 atomic % or more to 20 atomic % or less, hydrogen in an amount of from 20 atomic % or more to 50 atomic % or less, and the balance of carbon and inevitable impurities, when the entirety is taken as 100 atomic %, and exhibits a surface roughness Rzjis of 0.8 ?m or less. The low-friction sliding member exhibits reduced friction coefficients between itself and mating members, without relying on the adsorption and reaction of additives, included in lubricants, to the amorphous hard carbon films.Type: GrantFiled: April 27, 2005Date of Patent: May 6, 2008Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Hiroyuki Mori, Fumio Shimizu, Hideo Tachikawa, Toshihide Ohmori, Hiroshi Moritani, Mamoru Tohyama, Yoshio Shimura, Shigeru Hotta, Takashi Iseki
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Publication number: 20050238877Abstract: A low-friction sliding member is used under a wet condition employing a lubricant, and includes a substrate having a surface, and an amorphous hard carbon film formed on the surface of the substrate for contacting slidably with a mating member. The amorphous hard carbon film includes silicon in an amount of from 1 atomic % or more to 20 atomic % or less, hydrogen in an amount of from 20 atomic % or more to 50 atomic % or less, and the balance of carbon and inevitable impurities, when the entirety is taken as 100 atomic %, and exhibits a surface roughness Rzjis of 0.8 ?m or less. The low-friction sliding member exhibits reduced friction coefficients between itself and mating members, without relying on the adsorption and reaction of additives, included in lubricants, to the amorphous hard carbon films.Type: ApplicationFiled: April 27, 2005Publication date: October 27, 2005Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hiroyuki Mori, Fumio Shimizu, Hideo Tachikawa, Toshihide Ohmori, Hiroshi Moritani, Mamoru Tohyama, Yoshio Shimura, Shigeru Hotta, Takashi Iseki
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Publication number: 20040234770Abstract: Under wet sliding conditions using drivetrain system lubricating oils, a high frictional sliding member exhibiting a high friction coefficient, a favorable &mgr;-v characteristic stably, excellent wear resistance, and low mating-member aggressiveness is provided. The present invention is a wet sliding member comprising: a substrate composed of metal, ceramics, or resin; and an amorphous hard carbon film formed integrally on a surface of the substrate, having a surface, at least a part of which is turned into a sliding surface for sliding under wet conditions, and containing at least either one of Si and N in an amount of from 1 to 50 atomic %.Type: ApplicationFiled: March 2, 2004Publication date: November 25, 2004Inventors: Hiroyuki Mori, Hideo Tachikawa, Masaru Okuyama, Mamoru Tohyama, Toshihide Ohmori, Kazuyuki Nakanishi