Patents by Inventor Masahiro Maeda

Masahiro Maeda 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: 20150178211
    Abstract: An information processing apparatus includes: storage devices that store data; a data generation unit that generates padding-added data by adding padding to the data, based on adjustment information included in received data; and a storage processing unit that stores the padding-added data generated by the data generation unit in the storage devices. It is possible to shorten a latency even when non-aligned data is received.
    Type: Application
    Filed: March 6, 2015
    Publication date: June 25, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Shinya Hiramoto, Yuichiro Ajima, Tomohiro Inoue, Yuta Toyoda, Shun Ando, Masahiro Maeda
  • Patent number: 9056626
    Abstract: An electric power steering apparatus that is capable of efficiently suppressing vibrations and simultaneously minimizing steering performance degradation such as an increase in a steering wheel's viscous feeling by extracting a vibration component having an arbitrary amplitude and an arbitrary frequency range depending on an electric power steering state parameter and feeding back a vibration suppression compensation value determined depending on the extracted vibration component to a current command value.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: June 16, 2015
    Assignee: NSK LTD.
    Inventors: Yousuke Imamura, Takayoshi Sugawara, Masahiro Maeda
  • Publication number: 20150154115
    Abstract: A parallel computer system includes information processing devices, each of the information processing devices including a communication control device that performs communication, a main memory that stores data, and an arithmetic processing device that is coupled to the communication control device and the main memory, the information processing devices being coupled to each other through a network by the respective communication control device, wherein the arithmetic processing device includes a cache memory and a cache controller, the cache controller that executes an atomic operation for target data on the cache memory that stores the target data when the communication control device outputs an atomic operation request that is used to request the atomic operation, the atomic operation being not divided into a smaller operation, and notifies the communication control device of a result that is obtained by executing the atomic operation on the cache memory.
    Type: Application
    Filed: November 13, 2014
    Publication date: June 4, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Shinya Hiramoto, Tomohiro Inoue, Masahiro Maeda, Shun Ando, Yuta Toyoda
  • Publication number: 20150088381
    Abstract: An electric power steering apparatus that is capable of efficiently suppressing vibrations and simultaneously minimizing steering performance degradation such as an increase in a steering wheel's viscous feeling by extracting a vibration component having an arbitrary amplitude and an arbitrary frequency range depending on an electric power steering state parameter and feeding back a vibration suppression compensation value determined depending on the extracted vibration component to a current command value.
    Type: Application
    Filed: April 24, 2013
    Publication date: March 26, 2015
    Applicant: NSK LTD.
    Inventors: Yousuke Imamura, Takayoshi Sugawara, Masahiro Maeda
  • Publication number: 20140320057
    Abstract: A position controller sets a variable friction compensation value which varies in accordance with a change in sliding characteristics by providing a variable friction compensation value calculation unit that includes a sliding torque normalization calculation unit that normalizes a sliding torque at a predefined speed; a compensation value amplifying ratio calculation unit that calculates a compensation value amplifying ratio based on the sliding torque at the normalized speed; and multipliers.
    Type: Application
    Filed: April 24, 2014
    Publication date: October 30, 2014
    Applicant: OKUMA Corporation
    Inventors: Masahiro Maeda, Satoshi Eguchi
  • Patent number: 8831832
    Abstract: A motor control apparatus that is capable of making the whole control system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances while using a cheap and compact one-shunt type current detecting circuit and simultaneously diagnosing an estimation error and an electric power steering apparatus provide with the motor control apparatus.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: September 9, 2014
    Assignee: NSK Ltd.
    Inventors: Yuzuru Hoshi, Toru Sakaguchi, Sachio Nakayama, Masahiro Maeda, Kenji Mori, Yousuke Imamura
  • Patent number: 8825301
    Abstract: An electric power steering apparatus that compensates both a static friction and a dynamic friction, performs the switching between a static friction compensation and a dynamic friction compensation smoothly and without unpleasant sensation in order to achieve a natural comfortable steering feeling. In an electric power steering apparatus wherein a current command value is calculated based on at least a steering torque, and a motor is controlled by a current control value calculated based on said current command value to provide a steering assist force to a steering mechanism, wherein: there is provided a friction compensator calculating a friction compensation value for compensating friction to said steering mechanism on the basis of said steering torque, and said current command value is corrected by said friction compensation value.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: September 2, 2014
    Assignee: NSK Ltd.
    Inventors: Takayoshi Sugawara, Masahiro Maeda, Yong Wei
  • Patent number: 8803455
    Abstract: [Problem] An object of the present invention is to provide a motor controlling apparatus that comprises a single current sensor and obtains a maximal duty range that current becomes detectable with realizing size reduction, weight saving and cost reduction and an electric power steering apparatus using the same.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: August 12, 2014
    Assignee: NSK Ltd.
    Inventors: Yousuke Imamura, Masahiro Maeda, Kenichi Shimada
  • Publication number: 20140156144
    Abstract: A motor control apparatus that is capable of making the whole control system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances while using a cheap and compact one-shunt type current detecting circuit and simultaneously diagnosing an estimation error and an electric power steering apparatus provide with the motor control apparatus.
    Type: Application
    Filed: March 28, 2013
    Publication date: June 5, 2014
    Applicant: NSK LTD.
    Inventors: Yuzuru Hoshi, Toru Sakaguchi, Sachio Nakayama, Masahiro Maeda, Kenji Mori, Yousuke Imamura
  • Patent number: 8725357
    Abstract: A motor control apparatus that drive-controls a motor by an inverter based on each-phase duty command values of PWM and detects each-phase motor currents of the motor by a one-shunt type current detector. The apparatus includes a current detection correcting section that calculates a current detection correction value based on a power-supply voltage of the motor, each-phase duty command values, a back-EMF information of the motor, each-phase motor currents detected by the current detector, arrangement information of the PWM, and electric characteristic formula of the motor, thereby to correct the each-phase motor currents detected by the current detector to a motor average current by the current detection correction value and drive-controls the motor.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: May 13, 2014
    Assignee: NSK Ltd.
    Inventors: Yousuke Imamura, Kenji Mori, Masahiro Maeda
  • Patent number: 8710927
    Abstract: A high-frequency power amplifier that amplifies a high-frequency input signal and outputs a signal having one power selected from a plurality of powers includes a high output route that is a circuit, which amplifies the input signal and outputs a signal of a high power, and a medium output route that is a circuit, which amplifies the input signal and outputs a signal of a medium power. The high output route includes a high-output amplifier that amplifies the input signal, an output matching circuit that is connected to an output node of the high-output amplifier, and a switch element that is connected to an output node of the output matching circuit. The medium output route includes a medium-output amplifier that amplifies the input signal and a switch element that is connected between an output node of the medium-output amplifier and an output node of the output matching circuit.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: April 29, 2014
    Assignee: Panasonic Corporation
    Inventors: Masatoshi Kamitani, Masahiro Maeda, Katsuhiko Kawashima, Hiroshi Sugiyama
  • Publication number: 20140052885
    Abstract: A switch includes a plurality of ports and a combination determining unit that determines a central processing unit (CPU) to be paired with one of the ports. The port includes: an arbitration circuit that selects the CPU to be paired therewith when receiving an arbitration request from the CPU to be paired in a predetermined state, and selects one of the CPUs from which the arbitration request has been received in other cases to return transmission permission; and a data transfer unit that transfers the received data from the selected CPU to another CPU. The CPU includes: a request transmission unit that transmits the arbitration request to the ports; and a data transmission unit that transmits data to the paired port when the arbitration request is transmitted to the paired port in the predetermined state, and transmits data to the ports that have returned transmission permission in other cases.
    Type: Application
    Filed: June 18, 2013
    Publication date: February 20, 2014
    Inventors: Shun Ando, Shinya Hiramoto, Tomohiro Inoue, Yuta Toyoda, Masahiro Maeda, Yuichiro Ajima
  • Publication number: 20140047157
    Abstract: A parallel computer system includes a plurality of processors including a first processor and a plurality of second processors; and a crossbar switch provided with a plurality of ports; wherein the first processor transmits data to a first port among the plurality of ports, and transmits standby time information to the first port in the case where the plurality of second processors are unable to transmit data to the first port despite receiving a communication authorization notification from the first port, and the first port receives the standby time information, and after the standby time elapses, selects one of the plurality of second processors.
    Type: Application
    Filed: June 19, 2013
    Publication date: February 13, 2014
    Inventors: Shun ANDO, Shinya Hiramoto, Tomohiro Inoue, Yuta Toyoda, Masahiro Maeda, Yuichiro Ajima
  • Publication number: 20130285749
    Abstract: A high-frequency power amplifier that amplifies a high-frequency input signal and outputs a signal having one power selected from a plurality of powers includes a high output route that is a circuit, which amplifies the input signal and outputs a signal of a high power, and a medium output route that is a circuit, which amplifies the input signal and outputs a signal of a medium power. The high output route includes a high-output amplifier that amplifies the input signal, an output matching circuit that is connected to an output node of the high-output amplifier, and a switch element that is connected to an output node of the output matching circuit. The medium output route includes a medium-output amplifier that amplifies the input signal and a switch element that is connected between an output node of the medium-output amplifier and an output node of the output matching circuit.
    Type: Application
    Filed: June 28, 2013
    Publication date: October 31, 2013
    Inventors: MASATOSHI KAMITANI, MASAHIRO MAEDA, KATSUHIKO KAWASHIMA, HIROSHI SUGIYAMA
  • Publication number: 20130271047
    Abstract: [Problem] An object of the present invention is to provide a motor controlling apparatus that comprises a single current sensor and obtains a maximal duty range that current becomes detectable with realizing size reduction, weight saving and cost reduction and an electric power steering apparatus using the same.
    Type: Application
    Filed: July 26, 2011
    Publication date: October 17, 2013
    Applicant: NSK LTD.
    Inventors: Yousuke Imamura, Masahiro Maeda, Kenichi Shimada
  • Publication number: 20130158808
    Abstract: A motor control apparatus that drive-controls a motor by an inverter based on each-phase duty command values of PWM and detects each-phase motor currents of the motor by a one-shunt type current detector. The apparatus includes a current detection correcting section that calculates a current detection correction value based on a power-supply voltage of the motor, each-phase duty command values, a back-EMF information of the motor, each-phase motor currents detected by the current detector, arrangement information of the PWM, and electric characteristic formula of the motor, thereby to correct the each-phase motor currents detected by the current detector to a motor average current by the current detection correction value and drive-controls the motor.
    Type: Application
    Filed: May 23, 2012
    Publication date: June 20, 2013
    Applicant: NSK LTD.
    Inventors: Yousuke Imamura, Kenji Mori, Masahiro Maeda
  • Patent number: 8412080
    Abstract: A method of manufacturing a developing roller, including: a first rolling process for forming a first inclined groove which is continuous in a helical shape, by rotating a first die having blades inclined with respect to an axial direction and a circumferential direction, and a non-bladed die, and feeding an unprocessed developing roller between the first die and the non-bladed die; and a second rolling process for forming a second inclined groove which is continuous in a helical shape and intersects with the first inclined groove, by rotating a second die having blades inclined with respect to an axial direction and a circumferential direction in the direction opposite to that of the first die, and the non-bladed die in the same direction opposite to that in the first rolling process, and feeding the developing roller between the second die and the non-bladed die.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: April 2, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Maeda, Yoichi Yamada, Yoshiyuki Kurebayashi, Daisuke Matsumoto, Masaru Kobashi, Takatomo Fukumoto
  • Patent number: 8368459
    Abstract: A constant-voltage circuit includes: first and second field-effect transistors; a first node connected to the drains of the first and second field-effect transistors; a second node connected to the gates of the first and second field-effect transistors; a bipolar transistor whose collector is connected to the second node; a resistor connected to the source of the second field-effect transistor and the collector of the bipolar transistor; and a bias circuit that is connected to the source of the second field-effect transistor and supplies a bias voltage to the base of the bipolar transistor, wherein a power supply is connected to the first node and a constant voltage is outputted from the source of the first field-effect transistor.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: February 5, 2013
    Assignee: Panasonic Corporation
    Inventors: Masatoshi Kamitani, Masato Seki, Hiroshi Komori, Masahiro Maeda
  • Patent number: 8338379
    Abstract: An antibody capable of recognizing amyloid ? while not recognizing amyloid ? precursor proteins, and a method for using the same. A monoclonal antibody characterized by being capable of recognizing the N-terminus peptide of amyloid ? while not recognizing amyloid ? precursor proteins, an amyloid ? assay kit, a therapeutic agent of Alzheimer's disease, and a method for treating Alzheimer's disease using the monoclonal antibody.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: December 25, 2012
    Assignee: Intellect Neurosciences, Inc.
    Inventors: Haruyasu Yamaguchi, Noriaki Kinoshita, Masahiro Maeda, Yuko Horikoshi
  • Patent number: 8279010
    Abstract: The radio frequency power amplifier is connected between an other end of the first switching element and an other end of the second switching element, supplies power to a second amplifier via the first switching element and a second matching circuit, and includes a first power supply line for supplying power to the third amplifier via a second switching element and a third matching circuit, and the other end of the first switching element is connected to an input node of the first matching circuit, the other end of the second switching element is connected to the input node of the first matching circuit via the first power supply line, and an impedance of an output side of the RF power amplifier as viewed from an output node of the third amplifier is higher than an impedance of the RF power amplifier as viewed from an output node of the second amplifier.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: October 2, 2012
    Assignee: Panasonic Corporation
    Inventors: Masato Seki, Masatoshi Kamitani, Katsuhiko Kawashima, Masahiro Maeda