Patents by Inventor Masaru Okuyama
Masaru Okuyama 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).
-
Patent number: 10851776Abstract: A sliding member has a sliding surface sliding under a wet condition in which a lubricant oil exists. The sliding surface is coated with a laminate film comprising an upper layer and a lower layer. The lower layer comprises hydrogen-free amorphous carbon (hydrogen-free DLC) and carbon particles dispersed on or in the hydrogen-free DLC. The hydrogen-free DLC has a hydrogen content of 5 atom % or less when the lower layer as a whole is 100 atom %. The upper layer comprises boron-containing amorphous carbon (B-DLC) and has protrusions on a surface side of the upper layer along the carbon particles of the lower layer. The B-DLC has a boron content of 1-40 atom % when the upper layer as a whole is 100 atom %. The protrusions have a particle diameter of 0.5-5 ?m and exist with a density of 20 protrusions/100 ?m2 or more.Type: GrantFiled: January 3, 2019Date of Patent: December 1, 2020Assignees: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, JTEKT CORPORATIONInventors: Masaru Okuyama, Hiroyuki Mori, Mamoru Tohyama, Noriyuki Emoto, Naohito Yoshida
-
Publication number: 20190323498Abstract: A sliding member has a sliding surface sliding under a wet condition in which a lubricant oil exists. The sliding surface is coated with a laminate film comprising an upper layer and a lower layer. The lower layer comprises hydrogen-free amorphous carbon (hydrogen-free DLC) and carbon particles dispersed on or in the hydrogen-free DLC. The hydrogen-free DLC has a hydrogen content of 5 atom % or less when the lower layer as a whole is 100 atom %. The upper layer comprises boron-containing amorphous carbon (B-DLC) and has protrusions on a surface side of the upper layer along the carbon particles of the lower layer. The B-DLC has a boron content of 1-40 atom % when the upper layer as a whole is 100 atom %. The protrusions have a particle diameter of 0.5-5 ?m and exist with a density of 20 protrusions/100 ?m2 or more.Type: ApplicationFiled: January 3, 2019Publication date: October 24, 2019Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, JTEKT CORPORATIONInventors: Masaru OKUYAMA, Hiroyuki MORI, Mamoru TOHYAMA, Noriyuki EMOTO, Naohito YOSHIDA
-
Publication number: 20190177637Abstract: [Technical Problem] An object is to provide a sliding system that allows the friction coefficient at a sliding part to be considerably reduced by means of a novel combination of a chromium nitride 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 that can be interposed between the sliding surfaces facing each other. At least one of the sliding surfaces comprises a coating surface of a specific chromium nitride film, and the lubricant oil contains an oil-soluble molybdenum compound comprising molybdenum dialkyldithiophosphate (Mo-DTP). When the chromium nitride film as a whole is 100 at % (referred simply to as “%”), the chromium nitride film comprises 40-65% of Cr and 35-55% of N and has a relative surface area of 15-85%.Type: ApplicationFiled: November 12, 2018Publication date: June 13, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki MORI, Shigeru HOTTA, Mamoru TOHYAMA, Masaru OKUYAMA, Keiji HAYASHI, Kazuyoshi MANABE
-
Patent number: 10301568Abstract: [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: GrantFiled: January 27, 2017Date of Patent: May 28, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Mori, Mamoru Tohyama, Masaru Okuyama, Keiji Hayashi, Naoya Ikeda
-
Publication number: 20190100714Abstract: A sliding system includes a pair of sliding members having opposing sliding surfaces adapted to move relative to each other, and a lubricating oil interposed between the opposing sliding surfaces. Here, at least one of the sliding surfaces is a covered surface covered with a specific chromium nitride film. The lubricating oil contains an oil-soluble molybdenum compound formed of a molybdenum dialkyldithiocarbamate. In the chromium nitride film, when an amount of atoms constituting the entire chromium nitride film is set as 100 atom %, there is 32 atom % to 47 atom % of N, the balance is Cr, and a relative area which is an area ratio of the (111) plane with respect to the (200) plane obtained when the chromium nitride film is analyzed by X-ray diffraction is 20% to 30%.Type: ApplicationFiled: October 2, 2018Publication date: April 4, 2019Inventors: Shigeru HOTTA, Hiroyuki MORI, Mamoru TOHYAMA, Masaru OKUYAMA, Keiji HAYASHI, Kazuyoshi MANABE
-
Patent number: 10030207Abstract: 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: GrantFiled: July 9, 2015Date of Patent: July 24, 2018Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Hiroyuki Mori, Mamoru Tohyama, Masaru Okuyama, Keiji Hayashi, Naoya Ikeda
-
Patent number: 9790447Abstract: [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: GrantFiled: July 10, 2015Date of Patent: October 17, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Mori, Mamoru Tohyama, Masaru Okuyama, Keiji Hayashi, Naoya Ikeda
-
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
-
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
-
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
-
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
-
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
-
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
-
Publication number: 20100248602Abstract: A shaft portion finishing device for finishing the surface of a work having a shaft portion comprises a first shoe and a second shoe clamping the shaft portion, and an abrasive cloth interposed between the first and second shoes and the shaft portion. On the end face of the first shoe facing the abrasive cloth, a portion set softer than the end face of the second shoe facing the abrasive disc exists.Type: ApplicationFiled: November 12, 2008Publication date: September 30, 2010Applicant: HONDA MOTOR CO., LTD.Inventors: Shinichi Kakizawa, Masaru Okuyama, Takashi Sasaki
-
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
-
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