Patents by Inventor Tomoyasu Kitano
Tomoyasu Kitano 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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Patent number: 10822677Abstract: A forged component having a chemical composition including, by mass %, C: 0.30 to 0.45%, Si: 0.05 to 0.35%, Mn: 0.50 to 0.90%, P: 0.030 to 0.070%, S: 0.040 to 0.070%, Cr: 0.01 to 0.50%, Al: 0.001 to 0.050%, V: 0.25 to 0.35%, Ca: 0 to 0.0100%, N: 0.0150% or less, and the balance being Fe and unavoidable impurities, and satisfying formula 1. Metal structure is a ferrite pearlite structure, and a ferrite area ratio is 30% or more. Vickers hardness is in the range of 320 to 380 HV. 0.2% yield strength is 800 MPa or more. A Charpy V-notch impact value is in the range of 7 to 15 J/cm2.Type: GrantFiled: March 18, 2014Date of Patent: November 3, 2020Assignees: AICHI STEEL CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeyuki Uenishi, Susumu Owaki, Hisanori Koma, Tomoyasu Kitano, Kazuhiro Tanahashi, Nobuyuki Shinohara
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Publication number: 20150354042Abstract: A forged component having a chemical composition including, by mass %, C: 0.30 to 0.45%, Si: 0.05 to 0.35%, Mn: 0.50 to 0.90%, P: 0.030 to 0.070%, S: 0.040 to 0.070%, Cr: 0.01 to 0.50%, Al: 0.001 to 0.050%, V: 0.25 to 0.35%, Ca: 0 to 0.0100%, N: 0.0150% or less, and the balance being Fe and unavoidable impurities, and satisfying formula 1. Metal structure is a ferrite pearlite structure, and a ferrite area ratio is 30% or more. Vickers hardness is in the range of 320 to 380 HV. 0.2% yield strength is 800 MPa or more. A Charpy V-notch impact value is in the range of 7 to 15 J/cm2.Type: ApplicationFiled: March 18, 2014Publication date: December 10, 2015Applicants: AICHI STEEL CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeyuki UENISHI, Susumu OWAKI, Hisanori KOMA, Tomoyasu KITANO, Kazuhiro TANAHASHI, Nobuyuki SHINOHARA
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Patent number: 8414984Abstract: A method for manufacturing a powder for a magnetic core including at least a process of performing a siliconizing treatment on a surface of an iron powder containing elemental carbon. In the process of siliconizing treatment, a powder containing at least a silicon dioxide is brought into contact with the surface of the iron powder, elemental silicon is detached from the silicon dioxide by heating the powder of silicon dioxide, and the siliconizing treatment is performed by causing the detached elemental silicon to permeate and diffuse into a surface layer of the iron powder. The invention provides a method for manufacturing a powder for a magnetic core, by which loss reduction is achieved.Type: GrantFiled: November 11, 2008Date of Patent: April 9, 2013Assignees: Toyota Jidosha Kabushiki Kaisha, Fine Sinter Co., Ltd.Inventors: Eisuke Hoshina, Toshiya Yamaguchi, Yusuke Oishi, Tomoyasu Kitano, Kazuhiro Kawashima, Junghwan Hwang
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Patent number: 8118080Abstract: By pouring, by means of pressure, melted liquid of magnesium or magnesium alloy into a hollow portion which is formed using a casting mold, a valve body where a channel groove for hydraulic oil for use in a speed change operation of the automatic transmission is formed. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. As the magnesium has small heat capacity, variation of the temperature of the mold during the cooling and heating cycle can be suppressed. Moreover, as the magnesium melted liquid has no reactivity with respect to the casting mold, the convex portion is not deteriorated. This allows employment of a mold having a thinner convex portion formed thereon, and therefore formation of a valve body having a narrower channel groove.Type: GrantFiled: August 30, 2010Date of Patent: February 21, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshihiro Aoyama, Shinichi Itou, Akira Murakami, Tomoyasu Kitano
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Publication number: 20100327210Abstract: By pouring, by means of pressure, melted liquid of magnesium or magnesium alloy into a hollow portion which is formed using a casting mold, a valve body where a channel groove for hydraulic oil for use in a speed change operation of the automatic transmission is formed. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. As the magnesium has small heat capacity, variation of the temperature of the mold during the cooling and heating cycle can be suppressed. Moreover, as the magnesium melted liquid has no reactivity with respect to the casting mold, the convex portion is not deteriorated. This allows employment of a mold having a thinner convex portion formed thereon, and therefore formation of a valve body having a narrower channel groove.Type: ApplicationFiled: August 30, 2010Publication date: December 30, 2010Inventors: Toshihiro Aoyama, Shinichi Itou, Akira Murakami, Tomoyasu Kitano
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Patent number: 7854250Abstract: By pouring, by means of pressure, melted liquid of magnesium or magnesium alloy into a hollow portion which is formed using a casting mold, a valve body where a channel groove for hydraulic oil for use in a speed change operation of the automatic transmission is formed. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. As the magnesium has small heat capacity, variation of the temperature of the mold during the cooling and heating cycle can be suppressed. Moreover, as the magnesium melted liquid has no reactivity with respect to the casting mold, the convex portion is not deteriorated. This allows employment of a mold having a thinner convex portion formed thereon, and therefore formation of a valve body having a narrower channel groove.Type: GrantFiled: May 12, 2005Date of Patent: December 21, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshihiro Aoyama, Shinichi Itou, Akira Murakami, Tomoyasu Kitano
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Publication number: 20100271158Abstract: A method for manufacturing a powder for a magnetic core including at least a process of performing a siliconizing treatment on a surface of an iron powder containing elemental carbon. In the process of siliconizing treatment, a powder containing at least a silicon dioxide is brought into contact with the surface of the iron powder, elemental silicon is detached from the silicon dioxide by heating the powder of silicon dioxide, and the siliconizing treatment is performed by causing the detached elemental silicon to permeate and diffuse into a surface layer of the iron powder. The invention provides a method for manufacturing a powder for a magnetic core, by which loss reduction is achieved.Type: ApplicationFiled: November 11, 2008Publication date: October 28, 2010Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, FINE SINTER CO., LTD.Inventors: Eisuke Hoshina, Toshiya Yamaguchi, Yusuke Oishi, Tomoyasu Kitano, Kazuhiro Kawashima, Junghwan Hwang
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Publication number: 20100045120Abstract: According to the present invention, a magnetic powder for a dust core, which is excellent in terms of insulation properties without causing a decrease in the dust core magnetic flux density, a dust core comprising the magnetic powder, and a motor or a reactor having a core composed of the dust core are provided. Therefore, a magnetic powder 10 for a dust core is characterized in that relatively hard oxide fine powder particles 2 are dispersed over and fixed to the surface of a soft magnetic metal powder particle 1, and that a relatively soft insulating coat 3 is fixed to the oxide fine powder particles 2 and portions where the dispersed and fixed oxide fine powder particles 2 do not exist on the surface of the soft magnetic metal powder particle 1.Type: ApplicationFiled: December 28, 2007Publication date: February 25, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyasu Kitano, Eisuke Hoshina, Daisuke Ichigozaki
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Publication number: 20080061262Abstract: By pouring, by means of pressure, melted liquid of magnesium or magnesium alloy into a hollow portion which is formed using a casting mold, a valve body where a channel groove for hydraulic oil for use in a speed change operation of the automatic transmission is formed. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. As the magnesium has small heat capacity, variation of the temperature of the mold during the cooling and heating cycle can be suppressed. Moreover, as the magnesium melted liquid has no reactivity with respect to the casting mold, the convex portion is not deteriorated. This allows employment of a mold having a thinner convex portion formed thereon, and therefore formation of a valve body having a narrower channel groove.Type: ApplicationFiled: May 12, 2005Publication date: March 13, 2008Inventors: Toshihiro Aoyama, Shinichi Itou, Akira Murakami, Tomoyasu Kitano
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Publication number: 20070178006Abstract: A magnesium alloy containing aluminum, manganese and calcium includes 6˜12% by weight of aluminum, 0.1˜1.5% by weight of manganese, a calcium/aluminum mass ratio being 0.55˜1.0, and balance being magnesium and inevitable impurities.Type: ApplicationFiled: January 29, 2007Publication date: August 2, 2007Applicants: AISIN SEIKI KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji SAIKAWA, Hiroyuki KAWABATA, Naohisa NISHINO, Tomoyasu KITANO, Yoshikazu GENMA, Tadataka KANEKO
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Publication number: 20060222556Abstract: A heat resistant magnesium die casting alloy simultaneously improved in heat resistance and castability and expanded in range of application is provided. It comprises, includes, by wt %, the following composition: Al: over 6% to not more than 10 %, Ca: 1.8 to 5%, Sr: 0.05 to 1.0%, Mn: 0.1 to 0.6%, and Bal: Mg and unavoidable impurities, the ratio Ca/Al of the Ca content to the Al content being 0.3 to 0.5. To improve the corrosion resistance, 0.1 to 3% of a RE may also be added.Type: ApplicationFiled: September 16, 2004Publication date: October 5, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takumi Hijii, Tomoyasu Kitano, Koichi Ohori, Yusuke Nakaura, Harutoshi Matsuyama
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Patent number: 6299834Abstract: A heat-resistant magnesium alloy exhibiting excellent heat resistance and castability, which comprises 1.0 to 6.0 % by weight of zinc, 0.4 to 1.0 % by weight of zirconium, 1.5 to 5.0 % by weight of rare earth element, up to 0.3 % by weight of calcium, magnesium being as the balance, and unavoidable impurities.Type: GrantFiled: June 16, 2000Date of Patent: October 9, 2001Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Toshio Horie, Yoshio Sugiyama, Hiroaki Iwahori, Tomoyasu Kitano, Harumi Ueno, Takamasa Suzuki