Patents by Inventor Mutsumi Kikuchi

Mutsumi Kikuchi 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).

  • Publication number: 20110193413
    Abstract: A battery control device for a battery module includes a plurality of integrated circuits. Each integrated circuit includes: a constant voltage circuit that lowers a total voltage of a battery cell group corresponding to the integrated circuit to an integrated circuit internal voltage; a signal generation circuit that generates, based upon a first signal provided by a higher-order control circuit, a second signal assuming a wave height value different from a wave height value of the first signal and outputs the second signal; and a startup circuit that includes a first comparator assuming a first decision-making threshold value corresponding to the first signal and a second comparator assuming a second decision-making threshold value corresponding to the second signal, and starts up the constant voltage circuit in response to a change in an output from at least either the first comparator or the second comparator.
    Type: Application
    Filed: February 3, 2011
    Publication date: August 11, 2011
    Applicant: Hitachi Vehicle Energy, Ltd,
    Inventors: Akihiko KUDO, Mutsumi Kikuchi, Gosuke Shibahara, Akihiko Emori, Yasuo Uemura, Tatsumi Yamauchi, Kenji Kubo, Yoshinori Aoshima
  • Patent number: 7912409
    Abstract: The present invention provides an exchangeable toner cartridge which can be attached to or detached from an apparatus main body. The toner cartridge includes the toner transfer member which is provided along a longitudinal direction of the toner cartridge and which can rotate. At the first range of the upstream side in a toner transfer direction the toner transfer member is formed into a substantially spiral shape, and at the second range of the downstream side in the toner transfer direction on a side of a toner supply port, toner transfer member has a shape different from that of the first range.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: March 22, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasufumi Kayahara, Takuji Matsumoto, Hiromitsu Koizumi, Chiharu Nakajima, Mutsumi Kikuchi, Toyohiko Awano, Shigeki Nishimura
  • Patent number: 7883808
    Abstract: A power supply apparatus has a fuel cell unit as a source of input power. A control device limits the output of the fuel cell unit within an operating range of up to a maximum power point, even if a load power is not lower than the maximum power of said fuel cell unit. In addition to the fuel cell, a charge storing device is provided at the output side of the power supply apparatus. The charge storing device is capable of making up a shortage of power of the fuel cell.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: February 8, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Norimatsu, Akihiko Kanouda, Mutsumi Kikuchi
  • Patent number: 7876069
    Abstract: A fuel cell 1 and an electric double-layer capacitor 2 are parallelly arranged for a power supply. A DC/DC converter 3 steps up voltage of the fuel cell 1 and the electric double-layer capacitor 2, to thereby output power. An output switch 5 is disposed on an output pathway of the DC/DC converter 3. By controlling the output switch 5 with a control IC 4, output power can be switched on and off. When there is a fuel shortage or abnormality in the fuel cell 1, the control IC 4 controls the output switch 5, to thereby intermittently alter the output power. With this configuration, when the power supply is used for a mobile telephone as a portable electronic device connected thereto, a user can confirm whether there is a fuel shortage or a fuel cell abnormality by checking of blinking state of a charge pilot lamp of the mobile telephone.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: January 25, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Norimatsu, Akihiko Kanouda, Mutsumi Kikuchi
  • Patent number: 7846568
    Abstract: A power supply unit in a hybrid structure of a fuel cell and a power storage unit and a control method for the power supply unit, in which a small-size light-weight power storage unit is used and chances of incomplete functioning have been eliminated. In addition to the downsizing of the power storage unit and a reduction of the system price, it also becomes possible to start the fuel cell at high speed and raise the fuel cell temperature quickly, monitor output and remaining mounts of fuel and power, and take measures against fluctuations of output, and provides immediate availability of portable devices like the ones using a conventional secondary cell.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: December 7, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Norimatsu, Akihiko Kanouda, Mutsumi Kikuchi
  • Publication number: 20100244847
    Abstract: A battery monitoring system, comprises a battery state detection circuit that detects battery states of a plurality of battery cells that are connected in series, based on respective cell voltages of the plurality of battery cells, and a control circuit that monitors state of a battery cell, based on each cell voltage of the plurality of battery cells. The control circuit inputs pseudo voltage information to the battery state detection circuit, and thereby diagnoses whether or not the battery state detection circuit is operating normally.
    Type: Application
    Filed: February 25, 2010
    Publication date: September 30, 2010
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Gosuke Shibahara, Akihiko Emori, Yasuo Uemura, Tatsumi Yamauchi, Kenji Kubo, Masahito Sonehara, Masahiko Amano, Yoshinori Aoshima
  • Publication number: 20100247152
    Abstract: A developing unit including a retainer receiving portion for receiving a developer retainer, a first agitation portion adjacent to the retainer receiving portion, a second agitation portion adjacent to the first agitation portion, a first conveyance member received in the first agitation portion, a second conveyance member received in the second agitation portion, a layer thickness limiting member made of a magnetic material and disposed between the second conveyance member and the developer retainer to limit the layer thickness of a developer retained on the surface of a retaining member, and a blocking portion disposed on the upstream side of the layer thickness limiting member in the rotation direction of the retaining member and in a space located between the layer thickness limiting member and the second agitation portion to block a developer on the upstream side of the layer thickness limiting member from entering the space.
    Type: Application
    Filed: November 24, 2009
    Publication date: September 30, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventor: Mutsumi KIKUCHI
  • Publication number: 20100209748
    Abstract: A battery system includes: a battery unit formed by electrically connected in series a plurality of cell groups each made up with a plurality of battery cells electrically connected in series; a plurality of sensing lines for detecting voltages of respective battery cells in the battery unit; an integrated circuit provided to each of the cell group, to which the sensing lines for detecting voltages of respective battery cells in the cell group are connected; a case having housed therein a substrate at which a plurality of integrated circuits provided for the cell groups respectively are mounted; noise protection capacitors disposed between input terminals of the plurality of sensing lines; and at least one protection element against static electricity which is connected between the input terminals and the case.
    Type: Application
    Filed: February 12, 2010
    Publication date: August 19, 2010
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Kudo, Gosuke Shibahara, Mutsumi Kikuchi, Satoru Shigeta
  • Patent number: 7759975
    Abstract: A first converter circuit converts a state signal, whose level is constant or slowly varies during a predetermine period of time, into a pulse signal to allow the signal to propagate across an electrically insulating area. A second converter circuit converts the pulse signal, which has propagated through an insulating circuit, into the original state signal or a signal having the same characteristics as the original state signal.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: July 20, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Murabayashi, Takashi Sase, Mutsumi Kikuchi, Atsuo Watanabe, Masatsugu Amishiro, Kenji Tabuchi
  • Patent number: 7728545
    Abstract: In equipment with a built-in fuel cell, there are provided a plurality of secondary cells, and each of the secondary cells has a first state in which an electric power is supplied to a load within the equipment, and a second state in which the electric power that is supplied from the fuel cell is charged, and the first state and the second state is selectively used. The present invention can provide the fuel cell-carried equipment that stably operates due to a power system on which a fuel cell and plural secondary cells are mounted.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: June 1, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Kanouda, Mutsumi Kikuchi, Hideaki Koyama, Eisaku Fujita, Yasuaki Norimatsu
  • Patent number: 7667350
    Abstract: A method of controlling an electric power source apparatus, which comprises supplying electric power to an electronic device on which a secondary battery is mounted from a power source apparatus having a fuel cell and an auxiliary power source. Electric power is supplied intermittently to a charging terminal of the electronic device by means of a switch for controlling conduction and interruption of an output terminal of the power source apparatus.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: February 23, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Norimatsu, Akihiko Kanouda, Mutsumi Kikuchi
  • Patent number: 7647010
    Abstract: The present invention provides a toner cartridge of replaceable type that is removably loaded into an apparatus main body, the toner cartridge including: a first section that is substantially cylindrical shape and at which a toner conveying member is disposed; and a second section that is provided at a substantially central portion in a longitudinal direction of the toner cartridge, the substantially central portion being a portion other than an upstream side in a toner conveyance direction of the first section and a downstream side in the toner conveyance direction of the first section at which a toner supply opening.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: January 12, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiromitsu Koizumi, Chiharu Nakajima, Takuji Matsumoto, Toyohiko Awano, Shigeki Nishimura, Mutsumi Kikuchi, Yasufumi Kayahara
  • Publication number: 20100001737
    Abstract: A battery system includes a battery module that is constituted with a plurality of serially connected battery cells, a plurality of integrated circuits that group the battery cells by a plurality thereof so as to perform processing on battery cells in each group, a first transmission path through which a command signal is transmitted via a first insulating circuit from a higher-order control circuit that controls the plurality of integrated circuits to a highest-order integrated circuit of the integrated circuit, a second transmission path through which a data signal collected by the plurality of integrated circuits is transmitted from the highest-order integrated circuit to a lowest-order integrated circuit, and a third transmission path through which the data signal is transmitted from the lowest-order integrated circuit to the higher-order control circuit via a second insulating circuit.
    Type: Application
    Filed: June 30, 2009
    Publication date: January 7, 2010
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd
    Inventors: Kenji Kubo, Akihiko Kudo, Mutsumi Kikuchi, Gosuke Shibahara
  • Patent number: 7626353
    Abstract: When the mobile type information terminal is transferred between an operating state and a standby state, self diagnosis is performed. The fuel cell charges the secondary cells with a normal current of fixed value I1, and when the output voltage of the boost DC/DC converter (when PG=L), the charge current is reduced to the fixed value and aging is performed. After aging is performed for 60 seconds, charging is performed once again performed at the normal fixed value I1. This type of operation is repeated 30 times. During aging, when the output voltage from the boost DC/DC converter is reduced (when PG=L), aging is stopped and after 20 seconds aging is performed again, and this operation is done 10 times. The mobile type information terminal can perform self diagnosis and retrial of regeneration without the user being aware, in which secondary batteries and a fuel cell are loaded.
    Type: Grant
    Filed: October 19, 2005
    Date of Patent: December 1, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Kanouda, Mutsumi Kikuchi, Yasuaki Norimatsu, Junichi Kimura, Eisaku Fujita, Makoto Suzuki, Akira Ishii, Manabu Murakawa, Hideaki Koyama, Kazuaki Adachi
  • Publication number: 20090243621
    Abstract: An assembled battery total voltage detection circuit includes a main control circuit, a divider resistor connected between a plus terminal and a minus terminal of an assembled battery insulated from the main control circuit, and a differential amplifier circuit that amplifies voltage divided by the divider resistor. A constant electric potential relative to a ground of the main control circuit is applied to a midpoint of the divider resistor. The main control circuit measures the voltage divided by the divider resistor via the differential amplifier circuit.
    Type: Application
    Filed: February 19, 2009
    Publication date: October 1, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Masaki NAGAOKA
  • Publication number: 20090198399
    Abstract: A battery system for vehicle comprises a battery unit that is constituted with a plurality of serially connected cell groups each include a plurality of serially connected battery cells, integrated circuits that are each disposed in correspondence to one of the cell groups of the battery unit and each measure terminal voltages at the battery cells in the corresponding cell group, and a signal transmission path through which one of the integrated circuits is connected to another one of the integrated circuits or to a circuit other than that of the integrated circuits.
    Type: Application
    Filed: January 28, 2009
    Publication date: August 6, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Kenji KUBO, Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori
  • Publication number: 20090130541
    Abstract: A multi-series battery control system comprises battery cell groups each having a plurality of serially connected battery cells, a plurality of integrated circuits each disposed in correspondence to one of the battery cell groups and a battery control device that exchanges signals with the individual integrated circuits. Each integrated circuit includes an address setting means that receives a message unique to the integrated circuit, different from messages sent to other integrated circuits, from the battery control device, writes over an initialized address of the integrated circuit with the message and alters the message to a message with which an initialized address of another integrated circuit cannot be overwritten in a step assigned with an ordinal number matching the position of the integrated circuit with regard to the connection order.
    Type: Application
    Filed: August 19, 2008
    Publication date: May 21, 2009
    Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
    Inventors: Akihiko Emori, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo
  • Publication number: 20090115506
    Abstract: A first converter circuit converts a state signal, whose level is constant or slowly varies during a predetermine period of time, into a pulse signal to allow the signal to propagate across an electrically insulating area. A second converter circuit converts the pulse signal, which has propagated through an insulating circuit, into the original state signal or a signal having the same characteristics as the original state signal.
    Type: Application
    Filed: December 29, 2008
    Publication date: May 7, 2009
    Applicant: HITACHI, LTD.
    Inventors: Fumio Murabayashi, Takashi Sase, Mutsumi Kikuchi, Atsuo Watanabe, Masatsugu Amishiro, Kenji Tabuchi
  • Patent number: 7529511
    Abstract: The present invention provides an exchangeable toner cartridge which can be attached to or detached from an apparatus main body. The toner cartridge includes the toner transfer member which is provided along a longitudinal direction of the toner cartridge and which can rotate. At the first range of the upstream side in a toner transfer direction the toner transfer member is formed into a substantially spiral shape, and at the second range of the downstream side in the toner transfer direction on a side of a toner supply port, toner transfer member has a shape different from that of the first range.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: May 5, 2009
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasufumi Kayahara, Takuji Matsumoto, Hiromitsu Koizumi, Chiharu Nakajima, Mutsumi Kikuchi, Toyohiko Awano, Shigeki Nishimura
  • Patent number: 7526352
    Abstract: A semiconductor production system has a semiconductor manufacturing apparatus having an exposure unit, a control unit for controlling the exposure unit and a storage device; a semiconductor inspection apparatus having an observation unit, a control unit for controlling the observation unit and a storage device; and a storage device commonly used by the semiconductor manufacturing apparatus and the semiconductor inspection apparatus. The manufacturing apparatus, the inspection apparatus and the commonly used storage device are interconnected via a storage area network. With the semiconductor manufacturing apparatus and the storage device linked together via the storage area network, a large volume of image data or design data can be communicated at high speed, thus improving the system throughput.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: April 28, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Hidemitsu Naya, Rikio Tomiyoshi, Shigeo Moriyama, Mutsumi Kikuchi, Kotaro Shimamura