Patents by Inventor Kenji Takeda
Kenji Takeda 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: 20120223678Abstract: When detecting a fault of a master control device, a slave control device refers to master-device-line information, and obtains line information to establish a connection with the other master control device. The slave control device transmits connection request information to the master control device extracted from the other master control devices. The other master control device determines whether or not it is connectable with the slave control device that has transmitted the connection request information, and transmits a determination result as connectability information. The slave control device switches a communication line to the other master control device when the received connectability information indicates the connectable status.Type: ApplicationFiled: February 29, 2012Publication date: September 6, 2012Applicant: Hitachi, Ltd.Inventors: Kouichi YOKOURA, Motoo Futami, Kenji Takeda, Shin Yamauchi, Takeshi Uchida
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Publication number: 20120194139Abstract: A rechargeable battery system capable of suppressing the increase in the internal resistance of a lithium ion rechargeable battery and having long life is provided. A rechargeable battery system comprising rechargeable battery modules each having a plurality of lithium ion rechargeable batteries, and a charge/discharge control means for controlling assembled batteries having the rechargeable battery modules connected in parallel, in which the charge/discharge control means controls discharge, upon discharge of the lithium ion rechargeable batteries, on every lithium ion rechargeable battery modules connected in parallel is adopted.Type: ApplicationFiled: January 24, 2012Publication date: August 2, 2012Inventors: Hironori SASAKI, Kohei Honkura, Shin Yamauchi, Kenji Takeda, Tsunenori Yamamoto
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Patent number: 8222776Abstract: A power supply unit superimposes alternating-current voltage on direct-current voltage and applies it to a motor. As a result, when the motor is rotated, a current containing an alternating-current component flows. Further, the motor includes a capacitor connected in parallel with one phase coil. Owing to this capacitor, the impedance of the motor circuit between brushes is varied according to the rotation of the motor. Variation in impedance appears as variation in the amplitude of the alternating-current component in motor current. A signal processing unit extracts an alternating-current component from the motor current detected by the current detection unit and generates a rotation pulse corresponding to variation in the amplitude. A rotation angle detection unit detects the rotation angle of the motor based on this rotation pulse.Type: GrantFiled: August 5, 2009Date of Patent: July 17, 2012Assignee: Denso CorporationInventors: Ken Tanaka, Tsutomu Nakamura, Kenji Takeda, Masaru Touge, Yasuhiro Fukagawa
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Patent number: 8203333Abstract: A rotation angle detecting device includes a housing, a rotating shaft rotatably held by the housing, a driving gear fixed to the rotating shaft, a driven gear engaged with the driving gear, a magnetic field generating part fixed in the driven gear, having a permanent magnet, and configured to generate a magnetic field, a magnetic sensor element configured to detect a change in the magnetic field due to a rotational movement of the magnetic field generating part, and a signal processor configured to process a signal from the magnetic sensor element for detecting a rotation angle of the rotating shaft. Each of teeth of the driving gear has a first circumferential width, each of teeth of the driven gear has a second circumferential width, and the second circumferential width is greater than the first circumferential width.Type: GrantFiled: June 25, 2009Date of Patent: June 19, 2012Assignees: Nippon Soken, Inc., Denso CorporationInventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Patent number: 8052774Abstract: Disclosed herein is a method for concentrating gold contained in a leach residue obtained in a copper hydrometallurgical process for recovering copper from a copper sulfide mineral to efficiently separate and recover gold from the leach residue: a gold-bearing copper sulfide mineral is subjected to pressure leaching with sulfuric acid at a temperature higher than 102° C. and 112° C. or lower to obtain a leach residue, and the leach residue is subjected to flotation to separate it into a float fraction and a sink fraction; the float fraction obtained by flotation is desulfurized to obtain a desulfurized product; the desulfurized product is subjected to oxidative roasting to obtain an oxidatively-roasted product; the oxidatively-roasted product is dissolved in a sulfuric acid solution to obtain a copper solution, and a gold-bearing residue is separated and recovered from the copper solution.Type: GrantFiled: March 23, 2010Date of Patent: November 8, 2011Assignee: Sumitomo Metal Mining Co., Ltd.Inventors: Noriyuki Nagase, Satoshi Asano, Masatoshi Takano, Kenji Takeda, Shinichi Heguri, Atsushi Idegami
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Patent number: 8030917Abstract: A pair of cylindrical magnets with cut away portions has been arranged on both sides of a magnetic sensing element in symmetry of rotation, and a yoke surrounds the magnetic sensing element in contact with outer peripheral surfaces of the pair of the cylindrical magnets with cut away portions. The pair of the cylindrical magnets with cut away portions rotates around an axial center with a concurrent axial displacement along with a rotation of a rotating body. The pair of the cylindrical magnets with cut away portions is arranged in inclined manner against an axis-of-rotation of the magnet. Thereby, the rotation and the displacement in the direction of the axis against the magnetic sensing element of the pair of the cylindrical magnets with cut away portions, and the number of times of rotation can be detected by detecting the size of the magnetic flux density by the magnetic sensing element.Type: GrantFiled: December 10, 2008Date of Patent: October 4, 2011Assignees: Nippon Soken, Inc., Denso CorporationInventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Patent number: 8023494Abstract: In a mobile terminal in which a communication service is being executed, communication networks can be switched without causing a loss of communication data while maintaining the execution of the communication service. In a server which provides a communication service via communication networks provided in parallel and a mobile terminal which obtains the communication service using one of the communication networks, the mobile terminal activates another communication network in parallel while maintaining execution of the communication service to thereby transmit pieces of information having the same content, generated by copying, through the respective communication networks, and switches the one communication network being used to the other communication network.Type: GrantFiled: October 11, 2007Date of Patent: September 20, 2011Assignee: NEC CorporationInventor: Kenji Takeda
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Publication number: 20110178673Abstract: A vehicle includes a wheel and a vehicle body connected with each other via a suspension having a spring. An oscillation detection unit detects an oscillation of the vehicle body in forward and backward directions. A resonance frequency detection unit detects a resonance frequency of the vehicle body according to a detection result of the oscillation detection unit. A weight determination unit determines a weight of the vehicle body according to the resonance frequency detected by the resonance frequency detection unit.Type: ApplicationFiled: December 20, 2010Publication date: July 21, 2011Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Tsutomu Nakamura, Kenji Takeda, Yasuyuki Itoh
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Patent number: 7969147Abstract: A rotation angle detecting device includes a signal generator, a magnetic rotor and a rotation angle calculating unit that calculates a rotation angle ? of the rotor based on the output signals of the signal generator. The signal generator includes a magnetic rotor that has a permanent magnet and a shaft connectable with the rotating object and at least three magnetic sensor elements disposed in the magnetic field to generate a plurality of output signals when the rotor rotates.Type: GrantFiled: April 1, 2008Date of Patent: June 28, 2011Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Patent number: 7863904Abstract: A fuel cell detection device according to the present invention includes: a cell block formed with a plurality of cells serially connected to each other; a voltage detection element for detecting voltages of the cells within the cell block; and another voltage detection element for detecting a voltage of the operating power source of the voltage detection element, where the operating power source of the voltage detection element is supplied from a voltage of the inside or both ends of the cell block, and the operating power source of another voltage detection element is supplied from a voltage of the outside of the cell block, the operating power source of another voltage detection element being less variable than the operating power source of the voltage detection element.Type: GrantFiled: September 26, 2006Date of Patent: January 4, 2011Assignee: Hitachi, Ltd.Inventors: Kenji Takeda, Hironari Kawazoe, Motoo Futami, Masahiro Komachiya
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Publication number: 20100289387Abstract: A rotation detecting apparatus includes a direct-current motor, a power source part, an energization detecting part, and a rotation state detecting part. The direct-current motor is configured so that an inductance between a pair of brushes periodically changes in accordance with a rotation. The power source part applies a power source voltage between the pair of brushes. In the power source voltage, an alternating-current voltage is superimposed on a direct-current voltage. The energization detecting part detects an electric quantity related to the alternating-current voltage applied from the power source part to the direct-current motor. The rotation state detecting part detects at least one of a rotation angle, a rotation direction, and a rotation speed of the direct-current motor based on a change in an amplitude of an alternating-current component in the electric quantity detected by the energization detecting part.Type: ApplicationFiled: May 13, 2010Publication date: November 18, 2010Applicants: DENSO CORPORATION, Nippon Soken, Inc.Inventors: Ken Tanaka, Kenji Takeda, Tsutomu Nakamura, Masaru Touge, Yuuki Matsumoto
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Publication number: 20100242681Abstract: Disclosed herein is a method for concentrating gold contained in a leach residue obtained in a copper hydrometallurgical process for recovering copper from a copper sulfide mineral to efficiently separate and recover gold from the leach residue. According to the method, a gold-bearing copper sulfide mineral is subjected to pressure leaching with sulfuric acid at a temperature higher than 102° C. and 112° C. or lower to obtain a leach residue, and the leach residue is subjected to flotation to separate it into a float fraction and a sink fraction. The float fraction obtained by flotation is desulfurized by heating at a temperature of 250 to 800° C. under an inert atmosphere to obtain a desulfurized product. The desulfurized product is subjected to oxidative roasting by heating at a temperature of 600 to 800° C. under an atmosphere of flowing oxygen or air to obtain an oxidatively-roasted product.Type: ApplicationFiled: March 23, 2010Publication date: September 30, 2010Applicant: SUMITOMO METAL MINING CO., LTD.Inventors: Noriyuki Nagase, Satoshi Asano, Masatoshi Takano, Kenji Takeda, Shinichi Heguri, Atsushi Idegami
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Patent number: 7795753Abstract: To control the receiving power, this invention uses a secondary battery to cut peaks of the receiving power. Further, this invention calculates the load power from the detected receiving power value and command values of the secondary battery in the controller and the power generating facility, and filters the load power to create command values of the fuel cells.Type: GrantFiled: December 9, 2003Date of Patent: September 14, 2010Assignee: Hitachi, Ltd.Inventors: Masaya Ichinose, Kenji Takeda, Motoo Futami, Masahiro Komachiya, Kenji Kubo
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Patent number: 7696746Abstract: A turbine wheel of a turbocharger has a turbine blade. The turbine blade has a fin shape of which width in the rotation direction of the turbocharger is narrow, and is projected from the base portion of the turbine wheel. An inclined part of the turbine blade is inclined with respect to the rotation direction of the turbocharger. A coil is disposed so that the inclined part passes nearby as the turbine wheel rotates in a posture that an end in the center axis direction is directed toward the turbocharger. A detector detects a change in inductance, which occurs when the inclined part of the coil passes nearby.Type: GrantFiled: December 29, 2006Date of Patent: April 13, 2010Assignees: DENSO Corporation, Nippon Soken, Inc.Inventors: Osamu Shimomura, Tsutomu Nakamura, Kenji Takeda, Akitoshi Mizutani, Takao Ban
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Publication number: 20100033064Abstract: A power supply unit superimposes alternating-current voltage on direct-current voltage and applies it to a motor. As a result, when the motor is rotated, a current containing an alternating-current component flows. Further, the motor includes a capacitor connected in parallel with one phase coil. Owing to this capacitor, the impedance of the motor circuit between brushes is varied according to the rotation of the motor. Variation in impedance appears as variation in the amplitude of the alternating-current component in motor current. A signal processing unit extracts an alternating-current component from the motor current detected by the current detection unit and generates a rotation pulse corresponding to variation in the amplitude. A rotation angle detection unit detects the rotation angle of the motor based on this rotation pulse.Type: ApplicationFiled: August 5, 2009Publication date: February 11, 2010Applicant: DENSO CORPORATIONInventors: Ken Tanaka, Tsutomu Nakamura, Kenji Takeda, Masaru Touge, Yasuhiro Fukagawa
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Publication number: 20090322320Abstract: A rotation angle detecting device includes a housing, a rotating shaft rotatably held by the housing, a driving gear fixed to the rotating shaft, a driven gear engaged with the driving gear, a magnetic field generating part fixed in the driven gear, having a permanent magnet, and configured to generate a magnetic field, a magnetic sensor element configured to detect a change in the magnetic field due to a rotational movement of the magnetic field generating part, and a signal processor configured to process a signal from the magnetic sensor element for detecting a rotation angle of the rotating shaft. Each of teeth of the driving gear has a first circumferential width, each of teeth of the driven gear has a second circumferential width, and the second circumferential width is greater than the first circumferential width.Type: ApplicationFiled: June 25, 2009Publication date: December 31, 2009Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya
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Publication number: 20090319120Abstract: A steering angle sensor includes a magnetized body coupled through a gear to a steering shaft so as to rotate with rotation of the steering shaft, a magnetic sensing device for detecting a magnetic field generated by the magnetized body, a signal processing device for detecting a direction of the magnetic field based on the detected magnetic field and for detecting a steering angle of the steering shaft based on the direction of the magnetic field, a correlation signal output sensor mounted on the vehicle to output a correlation signal correlated with the steering angle, and a signal check circuit for determining whether the steering angle is valid or invalid based on comparison between the steering angle and the correlation signal.Type: ApplicationFiled: June 17, 2009Publication date: December 24, 2009Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Shinji HATANAKA, Kenji Takeda, Shigetoshi Fukaya
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Patent number: 7612557Abstract: An eddy current type sensor for detecting a conductor includes a LC circuit and an oscillator. The LC circuit has a coil and a capacitor connected in parallel with the coil. The oscillator supplies an alternating current of a predetermined oscillation frequency to the LC circuit. A signal voltage outputted from the LC circuit has a first voltage when the distance between the coil and the conductor is minimum and a second voltage when the distance between the coil and the conductor is maximum. A voltage difference between the first and second voltages has a first difference at a first temperature and has a second difference at a second temperature. The first and second differences become equal to each other at a first frequency and a second frequency. The oscillation frequency is set close to the first frequency or the second frequency.Type: GrantFiled: February 28, 2007Date of Patent: November 3, 2009Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Osamu Shimomura, Tsutomu Nakamura, Kenji Takeda, Akitoshi Mizutani, Takao Ban
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Patent number: 7560919Abstract: A rotation angle detecting device that detects a rotation angle of a rotating object includes a permanent magnet that generates magnetic fields in response to rotation of the rotating object, a magnetic sensor, a first yoke and a second yoke. The magnetic sensor includes a pair of close integrated magnetic sensing elements, such as hall elements, disposed at a position around the permanent magnet so that one of the sensing elements senses magnetic field at a phase different from the other. The first yoke and the second yoke forms two magnetic paths crossing each other at the magnetic sensor.Type: GrantFiled: September 29, 2006Date of Patent: July 14, 2009Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Shinji Hatanaka, Kenji Takeda, Tsutomu Nakamura, Osamu Shimomura, Takashi Kawashima, Koichiro Matsumoto
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Publication number: 20090146650Abstract: A driving gear, which is a scissors gear, fixed to a rotating body, engages with a driven gear, and the driven gear engages with a fixed screw receiver. A first gear and a second gear of the driving gear elastically bias the tooth of the driven gear by a coil spring in the direction of an inner side of a diameter; consequently the driven gear 5 is forced on the screw receiver. Gears formed in the tooth tips of the driven gear engage with a partial spiral screw of the screw receiver.Type: ApplicationFiled: December 10, 2008Publication date: June 11, 2009Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Shinji Hatanaka, Kenji Takeda, Shigetoshi Fukaya, Naoki Nakane