Patents by Inventor Toshikazu Matsuyama
Toshikazu Matsuyama 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: 11338385Abstract: A machine component includes a first region having a first linear expansion coefficient, and a second region having a second linear expansion coefficient greater than the first linear expansion coefficient and joined to the first region. A region including an outer periphery of an interface between the first region and the second region is inclined toward the second region side over the entire periphery. On a surface of the first region, a groove is formed to extend along the outer periphery of the interface.Type: GrantFiled: October 29, 2015Date of Patent: May 24, 2022Assignee: KOMATSU LTD.Inventors: Toshikazu Matsuyama, Masaharu Amano, Yoshitaka Shibata
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Patent number: 10906126Abstract: The method includes a step of preparing a first member made of a first metal and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of disposing the second member in a cavity of a mold, a step of heating the first member and the second member by relatively rotating the first member with respect to the second member, while pressing the first member against the second member, without changing a positional relationship, and a step of cooling the first member and the second member with the members being in contact with each other. In the step of disposing, the second member is disposed such that a second member contact surface is surrounded by the sidewall of the cavity.Type: GrantFiled: April 15, 2015Date of Patent: February 2, 2021Assignee: KOMATSU LTD.Inventors: Toshikazu Matsuyama, Masaharu Amano, Yoshitaka Shibata
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Patent number: 10888951Abstract: The method for producing a metal member includes a step of preparing a first member made of a first metal and having a recessed portion formed therein, and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of increasing temperatures of the first member and the second member by relatively rotating the second member with respect to the first member while pressing the second member against the first member with at least a part of the second member being received in the recessed portion, and a step of stopping the relative rotation of the second member with respect to the first member and cooling the first member and the second member with the members being pressed against each other.Type: GrantFiled: April 15, 2015Date of Patent: January 12, 2021Assignee: KOMATSU LTD.Inventors: Toshikazu Matsuyama, Masaharu Amano, Yoshitaka Shibata
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Patent number: 10763499Abstract: Provided is a novel positive electrode active material capable of suppressing resistance and improving rate characteristics and cycle characteristics while enhancing lithium ionic conductivity, wherein the surface of particles composed of a spinel-type composite oxide containing Li, Mn, O, and two or more other elements is coated with a lithium ion conductive oxide such as LiNbO3. Proposed is a positive electrode active material for an all-solid-type lithium secondary battery, wherein the surface of present core particles composed of a spinel-type composite oxide containing Li, Mn, O, and two or more other elements is coated with an amorphous compound containing Li, A (A represents one or more elements selected from the group consisting of Ti, Zr, Ta, Nb, and Al), and O; and the molar ratio (Li/A) of Li relative to the A element in the surface, as obtained by XPS, is 1.0 to 3.5.Type: GrantFiled: July 12, 2017Date of Patent: September 1, 2020Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Toshikazu Matsuyama, Tetsuya Mitsumoto, Hitohiko Ide, Daisuke Washida
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Patent number: 10618130Abstract: The method includes a step of preparing a first member made of a first metal and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of heating the first member and the second member by relatively rotating the first member and the second member, while pressing the first member and the second member against each other, without changing a relative positional relationship therebetween, and a step of cooling the first member and the second member heated, while being pressed against each other. In a first contact surface which is a surface of the first member coming into contact with the second member, a recess is formed so as to include a region intersecting the axis of rotation.Type: GrantFiled: April 15, 2015Date of Patent: April 14, 2020Assignee: KOMATSU LTD.Inventors: Toshikazu Matsuyama, Masaharu Amano, Yoshitaka Shibata
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Patent number: 10583518Abstract: The method for producing a metal member includes a step of preparing a first member made of a first metal, a second member made of a second metal, and a third member made of a third metal, and a step of joining the first member and the second member via the third member. The step of joining includes a step of heating the first member, the second member, and the third member by stacking the first member, the third member, and the second member in this order and relatively rotating the first member about an axis of rotation, while pressing the first member against the third member, without changing a positional relationship, and a step of cooling the first member, the second member, and the third member heated, with the members being in the stacked state.Type: GrantFiled: April 15, 2015Date of Patent: March 10, 2020Assignee: KOMATSU LTD.Inventors: Toshikazu Matsuyama, Masaharu Amano, Yoshitaka Shibata
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Patent number: 10446842Abstract: Provided is a new 5 V class spinel-type lithium manganese-containing composite oxide which enables the expansion of a high potential capacity region and the suppression of gas generation. The 5 V class spinel-type lithium manganese-containing composite oxide has an operating potential of 4.5 V or more at a metal Li reference potential, and contains Li, Mn, O and two or more other elements. The spinel-type lithium manganese-containing composite oxide is characterized in that, in an electronic diffraction image from a transmission electron microscope (TEM), a diffraction spot observed in the Fd-3m structure as well as a diffraction spot not observed in the Fd-3m structure are confirmed.Type: GrantFiled: April 28, 2016Date of Patent: October 15, 2019Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Tetsuya Mitsumoto, Kyohei Yamaguchi, Toshikazu Matsuyama, Hideaki Matsushima, Shinya Kagei
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Patent number: 10436192Abstract: A sliding component and its producing method are provided. The sliding component includes a base section made of steel or cast iron, and a sliding section having a sliding surface, made of copper alloy including hard particles, and joined to the base section. The hard particles in the sliding section are arranged such that those in a region including an outer periphery of the interface with the base section have their longitudinal directions coinciding with the directions along the outer periphery as compared to those in an inner peripheral side. This improves the durability of the sliding section in its region including the outer periphery of the interface with the base section.Type: GrantFiled: April 15, 2015Date of Patent: October 8, 2019Assignee: KOMATSU LTD.Inventors: Toshikazu Matsuyama, Masaharu Amano, Yoshitaka Shibata
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Publication number: 20190260018Abstract: Provided is a novel positive electrode active material capable of suppressing resistance and improving rate characteristics and cycle characteristics while enhancing lithium ionic conductivity, wherein the surface of particles composed of a spinel-type composite oxide containing Li, Mn, O, and two or more other elements is coated with a lithium ion conductive oxide such as LiNbO3. Proposed is a positive electrode active material for an all-solid-type lithium secondary battery, wherein the surface of present core particles composed of a spinel-type composite oxide containing Li, Mn, O, and two or more other elements is coated with an amorphous compound containing Li, A (A represents one or more elements selected from the group consisting of Ti, Zr, Ta, Nb, and Al), and O; and the molar ratio (Li/A) of Li relative to the A element in the surface, as obtained by XPS, is 1.0 to 3.5.Type: ApplicationFiled: July 12, 2017Publication date: August 22, 2019Inventors: Toshikazu Matsuyama, Tetsuya Mitsumoto, Hitohiko Ide, Daisuke Washida
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Patent number: 10312508Abstract: A positive electrode active material comprising a lithium metal composite oxide having a layered crystal structure provides a novel lithium metal composite oxide powder which can suppress the reaction with an electrolytic solution and raise the charge-discharge cycle ability of a battery, and can improve the output characteristics of a battery. A lithium metal composite oxide powder comprises a particle having a surface portion where one or a combination of two or more (“surface element A”) of the group consisting of Al, Ti and Zr is present, on the surface of a particle comprising a lithium metal composite oxide having a layered crystal structure, wherein the amount of surface LiOH is smaller than 0.10% by weight, and the amount of surface Li2CO3 is smaller than 0.25% by weight; in an X-ray diffraction pattern, the ratio of an integral intensity of the (003) plane of the lithium metal composite oxide to that of the (104) plane thereof is higher than 1.Type: GrantFiled: September 3, 2015Date of Patent: June 4, 2019Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Tetsuya Mitsumoto, Daisuke Washida, Toshikazu Matsuyama, Daisuke Inoue, Hideaki Matsushima, Yoshimi Hata, Hitohiko Ide, Shinya Kagei
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Patent number: 10276867Abstract: Provided is a new 5 V-class spinel-type lithium-manganese-containing composite oxide capable of achieving both the expansion of a high potential capacity region and the suppression of gas generation. Proposed is the spinel-type lithium-manganese-containing composite oxide comprising Li, Mn, O and two or more other elements, and having an operating potential of 4.5 V or more at a metal Li reference potential, wherein a peak is present in a range of 14.0 to 16.5° at 2?, in an X-ray diffraction pattern measured by a powder X-ray diffractometer (XRD) using CuK?1 ray.Type: GrantFiled: April 28, 2016Date of Patent: April 30, 2019Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Tetsuya Mitsumoto, Kyohei Yamaguchi, Toshikazu Matsuyama, Hideaki Matsushima, Shinya Kagei
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Publication number: 20190058191Abstract: Proposed is a novel lithium metal composite oxide having a layered structure, which is capable of improving the cycle characteristics in the case of using as a positive electrode active material for a battery. Proposed is a lithium metal composite oxide having a layered structure, which is represented by Li1+xNi1?x-?-?-?Mn?Co?M?O2 (wherein 0?x?0.1, 0.01???0.35, 0.01???0.35, 0???0.05, and M comprises at least one or more elements selected from the group consisting of Al, Mg, Ti, Fe, Zr, W, Y, and Nb), wherein the amount of residual Li2CO3 present in secondary particles is 0.03 to 0.3 wt %.Type: ApplicationFiled: February 27, 2017Publication date: February 21, 2019Inventors: Tetsuya Mitsumoto, Toshikazu Matsuyama, Daisuke Washida, Daisuke Inoue, Hideaki Matsushima, Shinya Kagei
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Publication number: 20180339361Abstract: A machine component includes a first region having a first linear expansion coefficient, and a second region having a second linear expansion coefficient greater than the first linear expansion coefficient and joined to the first region. A region including an outer periphery of an interface between the first region and the second region is inclined toward the second region side over the entire periphery. On a surface of the first region, a groove is formed to extend along the outer periphery of the interface.Type: ApplicationFiled: October 29, 2015Publication date: November 29, 2018Applicant: KOMATSU LTD.Inventors: Toshikazu MATSUYAMA, Masaharu AMANO, Yoshitaka SHIBATA
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Patent number: 10141570Abstract: The present invention relates to a positive electrode active material including a lithium metal composite oxide having a layer crystal structure, and provides a novel positive electrode active material for a lithium secondary cell, which can suppress the reaction with an electrolyte solution and can raise the charge-discharge cycle ability of the cell, and can make good the output characteristics of the cell.Type: GrantFiled: September 3, 2015Date of Patent: November 27, 2018Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Daisuke Washida, Toshikazu Matsuyama, Tetsuya Mitsumoto, Daisuke Inoue, Hideaki Matsushima, Yoshimi Hata, Hitohiko Ide, Shinya Kagei
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Publication number: 20180085848Abstract: The method for producing a metal member includes a step of preparing a first member made of a first metal and having a recessed portion formed therein, and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of increasing temperatures of the first member and the second member by relatively rotating the second member with respect to the first member while pressing the second member against the first member with at least a part of the second member being received in the recessed portion, and a step of stopping the relative rotation of the second member with respect to the first member and cooling the first member and the second member with the members being pressed against each other.Type: ApplicationFiled: April 15, 2015Publication date: March 29, 2018Applicant: KOMATSU LTD.Inventors: Toshikazu MATSUYAMA, Masaharu AMANO, Yoshitaka SHIBATA
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Publication number: 20180071859Abstract: The method for producing a metal member includes a step of preparing a first member made of a first metal, a second member made of a second metal, and a third member made of a third metal, and a step of joining the first member and the second member via the third member. The step of joining includes a step of heating the first member, the second member, and the third member by stacking the first member, the third member, and the second member in this order and relatively rotating the first member about an axis of rotation, while pressing the first member against the third member, without changing a positional relationship, and a step of cooling the first member, the second member, and the third member heated, with the members being in the stacked state.Type: ApplicationFiled: April 15, 2015Publication date: March 15, 2018Applicant: KOMATSU LTD.Inventors: Toshikazu MATSUYAMA, Masaharu AMANO, Yoshitaka SHIBATA
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Publication number: 20180071858Abstract: The method includes a step of preparing a first member made of a first metal and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of disposing the second member in a cavity of a mold, a step of heating the first member and the second member by relatively rotating the first member with respect to the second member, while pressing the first member against the second member, without changing a positional relationship, and a step of cooling the first member and the second member with the members being in contact with each other. In the step of disposing, the second member is disposed such that a second member contact surface is surrounded by the sidewall of the cavity.Type: ApplicationFiled: April 15, 2015Publication date: March 15, 2018Applicant: KOMATSU LTD.Inventors: Toshikazu MATSUYAMA, Masaharu AMANO, Yoshitaka SHIBATA
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Publication number: 20180056438Abstract: The method includes a step of preparing a first member made of a first metal and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of heating the first member and the second member by relatively rotating the first member and the second member, while pressing the first member and the second member against each other, without changing a relative positional relationship therebetween, and a step of cooling the first member and the second member heated, while being pressed against each other. In a first contact surface which is a surface of the first member coming into contact with the second member, a recess is formed so as to include a region intersecting the axis of rotation.Type: ApplicationFiled: April 15, 2015Publication date: March 1, 2018Applicant: KOMATSU LTD.Inventors: Toshikazu MATSUYAMA, Masaharu AMANO, Yoshitaka SHIBATA
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Publication number: 20180051693Abstract: A sliding component and its producing method are provided. The sliding component includes a base section made of steel or cast iron, and a sliding section having a sliding surface, made of copper alloy including hard particles, and joined to the base section. The hard particles in the sliding section are arranged such that those in a region including an outer periphery of the interface with the base section have their longitudinal directions coinciding with the directions along the outer periphery as compared to those in an inner peripheral side. This improves the durability of the sliding section in its region including the outer periphery of the interface with the base section.Type: ApplicationFiled: April 15, 2015Publication date: February 22, 2018Applicant: KOMATSU LTD.Inventors: Toshikazu MATSUYAMA, Masaharu AMANO, Yoshitaka SHIBATA
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Publication number: 20170309908Abstract: Provided is a new 5 V class spinel-type lithium manganese-containing composite oxide which enables the expansion of a high potential capacity region and the suppression of gas generation. The 5 V class spinel-type lithium manganese-containing composite oxide has an operating potential of 4.5 V or more at a metal Li reference potential, and contains Li, Mn, O and two or more other elements. The spinel-type lithium manganese-containing composite oxide is characterized in that, in an electronic diffraction image from a transmission electron microscope (TEM), a diffraction spot observed in the Fd-3m structure as well as a diffraction spot not observed in the Fd-3m structure are confirmed.Type: ApplicationFiled: April 28, 2016Publication date: October 26, 2017Inventors: Tetsuya Mitsumoto, Kyohei Yamaguchi, Toshikazu Matsuyama, Hideaki Matsushima, Shinya Kagei