Patents by Inventor Tomokazu Sakamoto

Tomokazu Sakamoto 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: 20210031855
    Abstract: A control device 20 of a rideable mobile body 1 determines a target speed of the rideable mobile body 1 according to at least the steering operation by a rider, and controls the travel of the rideable mobile body 1 according to the target speed. In the processing for determining a target speed, the target speed is restricted according to the positional relationship between a virtual wall set in a travel environment of the rideable mobile body 1 and the rideable mobile body 1. Thus, the comfort of the rider is secured while the travel of the rideable mobile body is restricted by the virtual wall.
    Type: Application
    Filed: February 19, 2019
    Publication date: February 4, 2021
    Inventors: Kazumasa Ozaki, Masaki Goto, Tomokazu Sakamoto, Takeshi Echizenya, Makoto Hasegawa
  • Publication number: 20200309130
    Abstract: Provided is an electric pump device which includes a motor having a shaft extending along a first central axis, a pump portion driven by the motor, and a housing for housing the motor and the pump portion. The housing includes: a housing body portion which has a bottomed tube shape and extends in an axial direction, a flange portion which expands radially outward from an outer peripheral surface of the housing body portion, and a projection portion extending from a bottom portion of the housing body portion toward one axial side. A second central axis of the projection portion is arranged at a position shifted in a radial direction from the first central axis. The flange portion has convex portions projected from the end surface facing the one axial side of the flange portion toward the one axial side.
    Type: Application
    Filed: March 18, 2020
    Publication date: October 1, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Hitoshi SAKAMOTO, Koji HIGUCHI, Kunihiro KAJITA, Tomokazu IKEDA
  • Publication number: 20200309118
    Abstract: Provided is an electric pump device which includes a motor having a shaft extending along a first central axis, a pump portion driven by the motor, and a housing for housing the motor and the pump portion. The housing includes: a housing body portion which has a bottomed tube shape and extends in an axial direction, a flange portion which expands radially outward from an outer peripheral surface of the housing body portion, a seal portion which has a ring shape extending in a circumferential direction and is arranged at a corner portion in which the outer peripheral surface of the housing body portion and an end surface facing one axial side of the flange portion are connected, and a projection portion extending from a bottom portion of the housing body portion toward one axial side. A second central axis of the projection portion is arranged at a position shifted in a radial direction from the first central axis.
    Type: Application
    Filed: March 18, 2020
    Publication date: October 1, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Hitoshi SAKAMOTO, Koji HIGUCHI, Kunihiro KAJITA, Tomokazu IKEDA
  • Publication number: 20200309156
    Abstract: An electric pump device includes a motor having a rotor and a stator portions, a pump portion and a housing. The stator portion has a stator core, and coils each having a winding portion and a crossover portion. The housing has a housing body portion having a tubular shape and extending in the axial direction, and a flange portion expanding radially outward from the outer peripheral surface of the housing body portion. The flange portion has an end surface that faces toward one side in the axial direction and is disposed in the axial direction between a first and a second virtual plane. The first and the second virtual planes pass through parts of the stator core, the winding portion, and the crossover portion located respectively closest to one and the other sides in the axial direction and expanding in a direction perpendicular to a central axis.
    Type: Application
    Filed: March 10, 2020
    Publication date: October 1, 2020
    Applicant: NIDEC TOSOK CORPORATION
    Inventors: Hitoshi SAKAMOTO, Koji HIGUCHI, Kunihiro KAJITA, Tomokazu IKEDA
  • Publication number: 20200111217
    Abstract: An extraction section extracts, from each of a plurality of non-defective product images which show the appearance of the inspection target determined to be a non-defective product, the non-defective vector representing a feature of each non-defective product image. A generation section generates a transformation matrix by using a plurality of non-defective product vectors extracted by the extraction section. The transformation matrix is a matrix representing sequentially performing first mapping for mapping the feature vector to a feature space and second mapping for mapping a result of the first mapping to the whole space to which the feature vector belongs. An adjusting section adjusts each element of the transformation matrix generated by the generation section by using, as learning data, the feature vector extracted from a pseudo defect image.
    Type: Application
    Filed: December 5, 2019
    Publication date: April 9, 2020
    Inventors: Yoshio YOKOYAMA, Yoshitaka SAKAMOTO, Kazuhiro HOTTA, Tomokazu MURATA
  • Patent number: 10522843
    Abstract: A supported bi-metallic non-platinum catalyst that is capable of oxidizing hydrazine to produce, as by-products of energy production, nitrogen, water, and zero or near-zero levels of ammonia is described. The catalyst is suitable for use in fuel cells, particularly those that utilizes an anion-exchange membrane and a liquid fuel such as hydrazine.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: December 31, 2019
    Assignee: STC. UNM
    Inventors: Alexey Serov, Plamen B Atanassov, Tomokazu Sakamoto, Hirohisa Tanaka, Koichiro Asazawa
  • Patent number: 10071781
    Abstract: An inverted pendulum vehicle 10 is provided with a display unit 70 for illuminating a floor surface 110 surrounding a vehicle body thereof, and a display control unit 87 for controlling an illumination pattern of the display unit according to an inclination angle detected by an inclination detection unit 66, 81.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: September 11, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yutaka Hirabayashi, Makoto Hasegawa, Hokuto Kanda, Tomokazu Sakamoto
  • Publication number: 20180148115
    Abstract: An inverted pendulum vehicle 10 is provided with a display unit 70 for illuminating a floor surface 110 surrounding a vehicle body thereof, and a display control unit 87 for controlling an illumination pattern of the display unit according to an inclination angle detected by an inclination detection unit 66, 81.
    Type: Application
    Filed: November 21, 2017
    Publication date: May 31, 2018
    Inventors: Yutaka Hirabayashi, Makoto Hasegawa, Hokuto Kanda, Tomokazu Sakamoto
  • Patent number: 9302727
    Abstract: An inverted pendulum control type moving body is provided with: a first driving portion that moves a host moving body at least in a forward/backward direction; a supporting portion that supports the inverted pendulum control type moving body so that it stands independently in a state of being in contact with the ground; an operation portion that switches between the ground contact state and a ground separation state of the supporting portion; and a control portion that, when the operation portion switches the state of the supporting portion from the ground contact state to the ground separation state, controls operation of the first driving portion so that a forward/backward direction tilt angle of the inverted pendulum control type moving body approximates a target tilt angle in the ground contact state.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: April 5, 2016
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazumasa Ozaki, Hiroshi Iwakami, Shinji Kawatani, Hideo Murakami, Shinya Shirokura, Atsushi Matsunaga, Tomokazu Sakamoto, Makoto Hasegawa, Shinichiro Kobashi
  • Publication number: 20150129326
    Abstract: An inverted pendulum control type moving body is provided with: a first driving portion that moves a host moving body at least in a forward/backward direction; a supporting portion that supports the inverted pendulum control type moving body so that it stands independently in a state of being in contact with the ground; an operation portion that switches between the ground contact state and a ground separation state of the supporting portion; and a control portion that, when the operation portion switches the state of the supporting portion from the ground contact state to the ground separation state, controls operation of the first driving portion so that a forward/backward direction tilt angle of the inverted pendulum control type moving body approximates a target tilt angle in the ground contact state.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 14, 2015
    Inventors: Kazumasa OZAKI, Hiroshi IWAKAMI, Shinji KAWATANI, Hideo MURAKAMI, Shinya SHIROKURA, Atsushi MATSUNAGA, Tomokazu SAKAMOTO, Makoto HASEGAWA, Shinichiro KOBASHI
  • Patent number: 8694185
    Abstract: A discharge control apparatus in an electric motorcycle includes a main battery; a motor driven based upon electric power supplied from the main battery and a lighting device that is a load other than the motor for consuming electric power. A BMU determines a remaining capacity of the main battery. A control member performs a discharge control of the main battery for supplying electric power to the motor and the lighting device. The BMU and the control member allow the discharge of the main battery until the remaining capacity becomes a threshold value higher than zero. When the control member receives an instruction of checking a deterioration state of the main battery from an external checking device, the control member performs a discharge of the main battery until the remaining capacity reaches zero, and then, allows the main battery to be fully charged so as to determine a chargeable capacity.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: April 8, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tomokazu Sakamoto, Tatsuo Hayashi
  • Publication number: 20130189603
    Abstract: [Problem] To provide a fuel cell having excellent power generation performance, which includes a compound containing at least hydrogen and nitrogen as fuel and uses an anion exchange membrane as an electrolyte layer. [Solution] In a fuel cell 1 including an electrolyte layer 4 formed from an anion exchange membrane, a fuel side electrode 2 and an oxygen side electrode 3, both electrodes being disposed to face each other with the electrolyte layer 4 interposed therebetween, the fuel side electrode 2 contains lanthanum and nickel as a metal catalyst such that the content proportion of lanthanum is 10 to 30% relative to the total mole of the lanthanum and nickel. Further, a compound containing at least hydrogen and nitrogen, such as hydrazine, is used as fuel.
    Type: Application
    Filed: September 9, 2011
    Publication date: July 25, 2013
    Inventors: Tomokazu Sakamoto, Koichiro Asazawa, Koji Yamada, Hirohisa Tanaka
  • Patent number: 8253362
    Abstract: An apparatus which estimates the temperatures of a motor without using a temperature sensor can achieve overheat protection by proper control. In an example, a heat generation amount calculation section calculates a heat generation amount of a motor. A current upper limit map has a current upper limit value corresponding to a temperature estimated value and a ratio map has a ratio corresponding to the temperature estimated value. A lower one of limited current values, determined using the two maps, controls energization of the motor. The heat generation amount calculation section includes a heat generation correction term, and a heat radiation correction term for calculating a function of the difference between the integrated value of the heat generation amount and a motor ambient temperature. If the ambient temperature becomes equal to or higher than a comparison temperature, then the heat generation amount is calculated without the heat radiation correction present.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: August 28, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventor: Tomokazu Sakamoto
  • Publication number: 20120015281
    Abstract: A fuel cell includes an electrolyte layer; a fuel-side electrode to which fuel is supplied; and an oxygen-side electrode to which oxygen is supplied, the fuel-side electrode and the oxygen-side electrode being disposed to face each other with the electrolyte layer sandwiched therebetween. The electrolyte layer is an anion exchange membrane. The fuel-side electrode contains cobalt and nickel. The fuel includes a compound containing at least hydrogen and nitrogen. The proportion of the nickel content relative to total moles of cobalt and nickel in the fuel-side electrode is 70 mol % or less.
    Type: Application
    Filed: March 3, 2010
    Publication date: January 19, 2012
    Applicant: Daihatsu Motor Co., Ltd.
    Inventors: Tomokazu Sakamoto, Koichiro Asazawa
  • Publication number: 20120004798
    Abstract: A discharge control apparatus in an electric motorcycle includes a main battery; a motor driven based upon electric power supplied from the main battery and a lighting device that is a load other than the motor for consuming electric power. A BMU determines a remaining capacity of the main battery. A control member performs a discharge control of the main battery for supplying electric power to the motor and the lighting device. The BMU and the control member allow the discharge of the main battery until the remaining capacity becomes a threshold value higher than zero. When the control member receives an instruction of checking a deterioration state of the main battery from an external checking device, the control member performs a discharge of the main battery until the remaining capacity reaches zero, and then, allows the main battery to be fully charged so as to determine a chargeable capacity.
    Type: Application
    Filed: June 28, 2011
    Publication date: January 5, 2012
    Inventors: Tomokazu SAKAMOTO, Tatsuo Hayashi
  • Publication number: 20110101904
    Abstract: An apparatus which estimates the temperatures of a motor without using a temperature sensor can achieve overheat protection by proper control. In an example, a heat generation amount calculation section calculates a heat generation amount of a motor. A current upper limit map has a current upper limit value corresponding to a temperature estimated value and a ratio map has a ratio corresponding to the temperature estimated value. A lower one of limited current values, determined using the two maps, controls energization of the motor. The heat generation amount calculation section includes a heat generation correction term, and a heat radiation correction term for calculating a function of the difference between the integrated value of the heat generation amount and a motor ambient temperature. If the ambient temperature becomes equal to or higher than a comparison temperature, then the heat generation amount is calculated without the heat radiation correction present.
    Type: Application
    Filed: October 12, 2010
    Publication date: May 5, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Tomokazu SAKAMOTO
  • Patent number: 7669690
    Abstract: A removable steering angle sensor for a motor-driven power steering apparatus for use in a vehicle intended for rough road use. The handlebar of the vehicle is disposed on an upper portion of a steering shaft, and a motor-driven power steering apparatus, including a power assist portion as an actuator unit, is disposed in a middle portion of the steering shaft. The steering angle sensor for detecting a steering angle is disposed on one end of the steering shaft, or more specifically, on a lower end portion of an output shaft, or a leading end portion of an output shaft. During maintenance, this arrangement provides for easy removal and installation of the steering angle sensor.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: March 2, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takumi Makabe, Tomokazu Sakamoto, Hajime Uchiyama
  • Patent number: 7654542
    Abstract: To reduce a load on an electric motor for a power assisted motor-driven power steering apparatus. The present invention includes side projecting portions secured to an input shaft with an upwardly projecting tab as a first stopper secured to a vehicle body at a position corresponding to the side projecting portions. The upwardly projecting tab being provided for restricting a swing range of the side projecting portions. The side projecting portions are secured to an output shaft. A downwardly projecting portion is provided as a second stopper secured to the vehicle body at a position corresponding to the side projecting portions. The downwardly projecting portion being provided for restricting a swing range of the side projecting portions.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: February 2, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hideo Yanai, Tomokazu Sakamoto
  • Patent number: 7639107
    Abstract: It is an object to provide is an overcurrent relay having less number of parts and a smaller space to implement an automatic reset function and a manual reset function. A contact point mechanism 110 includes a movable contactor support 10 for supporting a movable contactor composing a part of the usually-closed contact point while being maintained in the movable iron core 5, and a reset bar 14 arranged in a manner that is switchable between an automatic reset setting and a manual reset setting. The reset bar 14 does not engage with the movable contactor support 10 in an operation range of the movable contactor support 10 in the automatic reset setting.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: December 29, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hideaki Ohkubo, Tomokazu Sakamoto
  • Patent number: 7610132
    Abstract: A power steering system of an all-terrain buggy vehicle is provided to protect a power assist motor against obstacles encountered during traveling on the irregular ground, or the like. In a power steering system of a four-wheeled buggy vehicle in which a steering shaft rotated in response to the operation of a handlebar is disposed forward of an engine located at the almost-middle in the back-and-forth direction of a body frame, and the rotary shaft of a power assist motor is disposed perpendicular to the steering shaft, the power assist motor is located inside the body frame.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: October 27, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hideo Yanai, Sumitaka Ogawa, Tomokazu Sakamoto