Patents by Inventor Kazuki Aoyagi
Kazuki Aoyagi 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: 11949111Abstract: In a lithium ion secondary battery (1), a positive electrode (2) and a negative electrode (3) are alternately adjacent to each other via separators (4) and (5). The positive electrode (2) includes a positive electrode current collector composed of a metal porous body, a first positive electrode active material (21) held on one side of the positive electrode current collector, and a second positive electrode active material (22) held on the other side. The negative electrode (3) includes a negative electrode current collector composed of a metal porous body, a first negative electrode active material (31) held on one side of the negative electrode current collector, and a second negative electrode active material (32) held on the other side. The first positive electrode active material (21) faces the first negative electrode active material (31), and the positive electrode active material (22) faces the second negative electrode active material (32).Type: GrantFiled: May 9, 2019Date of Patent: April 2, 2024Assignees: HONDA MOTOR CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kiyoshi Tanaami, Akihisa Tanaka, Shintaro Aoyagi, Kazuki Okuno, Akihisa Hosoe, Kikuo Senoo, Hiroshi Takebayashi
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Patent number: 11942876Abstract: A power conversion device includes: a power conversion circuit connected to a direct-current power supply and a power system and configured to perform conversion between direct-current power and alternating-current power; a phase-locked loop circuit configured to output a phase instruction value based on a system alternating-current voltage phase of the power system; and a control circuit configured to control the power conversion circuit based on the phase instruction value from the phase-locked loop circuit. The phase-locked loop circuit includes: a phase difference calculation section configured to calculate a phase difference in a predetermined cycle, the phase difference representing a deviation of the phase instruction value from the system alternating-current voltage phase of the power system; a phase difference correction section; and a phase instruction value generation section configured to output the phase instruction value based on an output of the phase difference correction section.Type: GrantFiled: December 20, 2019Date of Patent: March 26, 2024Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kazuki Aoyagi, Yoshihiro Tawada
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Publication number: 20230318485Abstract: An electric-power converter includes a plurality of direct-current power supplies, a plurality of power conversion circuits provided corresponding to the respective direct-current power supplies, an alternating-current power system configured to cause a plurality of alternating-current ends provided in the respective power conversion circuits to be directly connected in parallel through a parallel connection point, and to supply the alternating-current power output from the plurality of alternating-current ends to an alternating-current side through the parallel connection point, a plurality of grounding wires each configured to connect at least two of a plurality of direct-current negative buses between the plurality of direct-current power supplies and the plurality of power conversion circuits, to earth, and a plurality of diodes inserted in series into the respective grounding wires, and each including a cathode side connected to the corresponding direct-current negative bus and an anode side grounded.Type: ApplicationFiled: October 28, 2020Publication date: October 5, 2023Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kazuki AOYAGI, Issei FUKASAWA
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Publication number: 20230261587Abstract: A power conversion device includes: a power conversion circuit connected to a direct-current power supply and a power system and configured to perform conversion between direct-current power and alternating-current power; a phase-locked loop circuit configured to output a phase instruction value based on a system alternating-current voltage phase of the power system; and a control circuit configured to control the power conversion circuit based on the phase instruction value from the phase-locked loop circuit. The phase-locked loop circuit includes: a phase difference calculation section configured to calculate a phase difference in a predetermined cycle, the phase difference representing a deviation of the phase instruction value from the system alternating-current voltage phase of the power system; a phase difference correction section; and a phase instruction value generation section configured to output the phase instruction value based on an output of the phase difference correction section.Type: ApplicationFiled: December 20, 2019Publication date: August 17, 2023Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Kazuki AOYAGI, Yoshihiro TAWADA
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Patent number: 11364546Abstract: Provided is a chuck apparatus enabling ease of rotation of a rotating cylinder in the loosening direction when replacing a tool, suppressed wear of the ratchet teeth, and a longer life span. Through the rotation of a rotating cylinder (1), the chuck apparatus expands or contracts a plurality of jaws (3) inserted into a hole (2a) provided to a tip end of a body (2), and sandwiches and holds a tool (4) using the jaws (3). An annular rotating body (8) screwed together with the jaws (3) and rotating together with the rotating cylinder (1) is fitted to the body (2) inside the rotating cylinder (1).Type: GrantFiled: July 6, 2017Date of Patent: June 21, 2022Assignee: YUKIWA SEIKO INC.Inventors: Kazuo Sakamaki, Koji Sakamaki, Tadashi Taniguchi, Kazuki Aoyagi
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Publication number: 20210170499Abstract: Provided is a chuck apparatus enabling ease of rotation of a rotating cylinder in the loosening direction when replacing a tool, suppressed wear of the ratchet teeth, and a longer life span. Through the rotation of a rotating cylinder (1), the chuck apparatus expands or contracts a plurality of jaws (3) inserted into a hole (2a) provided to a tip end of a body (2), and sandwiches and holds a tool (4) using the jaws (3). An annular rotating body (8) screwed together with the jaws (3) and rotating together with the rotating cylinder (1) is fitted to the body (2) inside the rotating cylinder (1).Type: ApplicationFiled: July 6, 2017Publication date: June 10, 2021Applicant: YUKIWA SEIKO INC.Inventors: Kazuo SAKAMAKI, Koji SAKAMAKI, Tadashi TANIGUCHI, Kazuki AOYAGI
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Patent number: 7845428Abstract: An extremely useful rotating tool is provided that can prevent rattling caused by a clearance between a machine tool and a machine tool retaining hole while bringing the axial center position of the machine tool and the axial center position of the machine tool retaining hole as close together as possible. The present invention is a rotating tool having a rotating main shaft (4), and the rotating main shaft (4) is provided with a machine tool retaining hole (3) having a cross-sectional shape that substantially matches a base part (2) of a driver bit, drill bit, or other machine tool (1) having a polygonal cross-sectional shape that is inserted into the machine tool retaining hole (3), wherein the rotating tool rotates the machine tool (1) inserted in the machine tool retaining hole (3) by rotating the rotating main shaft (4) and performs work.Type: GrantFiled: May 19, 2006Date of Patent: December 7, 2010Assignee: Yukiwa Seiko Kabushiki KaishaInventors: Kazuo Sakamaki, Akira Sakamaki, Tadashi Taniguchi, Kazuki Aoyagi
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Publication number: 20090308629Abstract: An extremely useful rotating tool is provided that can prevent rattling caused by a clearance between a machine tool and a machine tool retaining hole while bringing the axial center position of the machine tool and the axial center position of the machine tool retaining hole as close together as possible. The present invention is a rotating tool having a rotating main shaft (4), and the rotating main shaft (4) is provided with a machine tool retaining hole (3) having a cross-sectional shape that substantially matches a base part (2) of a driver bit, drill bit, or other machine tool (1) having a polygonal cross-sectional shape that is inserted into the machine tool retaining hole (3), wherein the rotating tool rotates the machine tool (1) inserted in the machine tool retaining hole (3) by rotating the rotating main shaft (4) and performs work.Type: ApplicationFiled: May 19, 2006Publication date: December 17, 2009Applicant: YUKIWA SEIKO KABUSHIKI KAISHAInventors: Kazuo Sakamaki, Akira Sakamaki, Tadashi Taniguchi, Kazuki Aoyagi