Patents by Inventor Mitsuo Sasaki

Mitsuo Sasaki 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).

  • Patent number: 11075599
    Abstract: A brushless motor includes: a motor rotor; a stator coil section which has a plurality of energization phases, which includes a first stator coil and a second stator coil that are provided to each phase, and which is arranged to generate a magnetic field, and thereby rotate the motor rotor; and a connection switching section configured to switch a connection of the first stator coil and the second stator coil from a serial connection to a parallel connection, or from the parallel connection to the serial connection.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: July 27, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Kohtaro Shiino, Mitsuo Sasaki
  • Publication number: 20210129855
    Abstract: An electronic control device includes a control command generation unit that generates and outputs a control command for controlling a first control object; a communication unit that performs communication with another electronic control device that controls a second control object; a communication abnormality determination unit that determines whether communication with the another electronic control device by the communication unit is abnormal; and a reset determination unit that determines whether the another electronic control device is reset based on a change in a sensor signal related to a state of the second control object when the communication abnormality determination unit determines that the communication with the another electronic control device is abnormal.
    Type: Application
    Filed: December 4, 2017
    Publication date: May 6, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shogo NAKAO, Nobuki SATO, Mitsuo SASAKI
  • Publication number: 20210078102
    Abstract: According to one embodiment, a coating method includes: forming a plurality of recesses in a surface of a member containing a first material; and filling up the recesses and covering at least a part of the surface with solidified powder by supplying powder containing a second material different from the first material. The supplying the powder includes: discharging the powder toward one of the recesses; and melting the powder at a location spaced from an inner surface of the member forming the recess or on the inner surface.
    Type: Application
    Filed: August 10, 2020
    Publication date: March 18, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasutomo SHIOMI, Mitsuo SASAKI
  • Publication number: 20210039314
    Abstract: A nozzle according to one embodiment has an inner surface and an outer surface, and is provided with a first passage through which an energy ray passes, and a second passage that is provided between the inner surface and the outer surface, and through which powder and fluid pass. The second passage includes a second open end on one end thereof in a first direction. A first surface that is one of the inner surface and the outer surface includes a first edge on one end thereof in the first direction. A second surface that is the other one of those includes a second edge on one end thereof in the first direction, and is distanced from the first edge toward the first direction. The fluid ejected from the second open end flows along the second surface, and separates at the second edge.
    Type: Application
    Filed: October 16, 2020
    Publication date: February 11, 2021
    Applicants: Technology Research Association for Future Additive Manufacturing, Kabushiki Kaisha Toshiba, Toshiba Kikai Kabushiki Kaisha
    Inventors: Hiroshi OHNO, Satoshi TSUNO, Mitsuo SASAKI, Tomohiko YAMADA, Yasutomo SHIOMI, Shimpei FUJIMAKI
  • Publication number: 20200406962
    Abstract: A control device for an on-board device including an actuator is configured to: supply power to a first microprocessor and a first driver circuit from a first power source through a first power supply path; supply power to a second microprocessor and a second driver circuit from a second power source through a second power supply path; and use the first and second driver circuits to drive the actuator. In this control device, the negative electrodes of the first and second power sources are electrically connected to a common ground portion. Furthermore, the control device includes a first and second sensor for measuring current or voltage between the vehicle body ground and the negative electrodes of the first and second power source, respectively. When detecting an abnormal current or voltage, the first and second microprocessors control the first and second driver circuits so as to place a limit on power supply to the actuator.
    Type: Application
    Filed: January 23, 2019
    Publication date: December 31, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuaki NAKADA, Mitsuo SASAKI
  • Publication number: 20200406963
    Abstract: A control device for an on-board device including an actuator is configured to: supply power to a first microprocessor and a first driver circuit from a first power source through a first power supply path; supply power to a second microprocessor and a second driver circuit from a second power source through a second power supply path; and use the first and second driver circuits to drive the actuator. In this control device, the negative electrodes of the first and second power sources are electrically connected to a common ground portion. Specifically, the first negative electrode of the first power source and the second negative electrode of the second power source are connected to the common ground portion respectively through independent first and second connector portions.
    Type: Application
    Filed: January 24, 2019
    Publication date: December 31, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuaki NAKADA, Mitsuo SASAKI
  • Patent number: 10843408
    Abstract: A nozzle according to one embodiment has an inner surface and an outer surface, and is provided with a first passage through which an energy ray passes, and a second passage that is provided between the inner surface and the outer surface, and through which powder and fluid pass. The second passage includes a second open end on one end thereof in a first direction. A first surface that is one of the inner surface and the outer surface includes a first edge on one end thereof in the first direction. A second surface that is the other one of those includes a second edge on one end thereof in the first direction, and is distanced from the first edge toward the first direction. The fluid ejected from the second open end flows along the second surface, and separates at the second edge.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: November 24, 2020
    Assignees: Technology Research Association for Future Additive Manufacturing, Kabushiki Kaisha Toshiba, Toshiba Kikai Kabushiki Kaisha
    Inventors: Hiroshi Ohno, Satoshi Tsuno, Mitsuo Sasaki, Tomohiko Yamada, Yasutomo Shiomi, Shimpei Fujimaki
  • Patent number: 10780634
    Abstract: A nozzle according to one embodiment includes a nozzle unit and a guide surface. A first passage, a second passage, and the guide surface are provided to the nozzle unit. The first passage has a first open end. The second passage has a second open end, and a section that is positioned upstream of the second open end and that extends in a second direction. The guide surface has an edge in a first direction. The guide surface is exposed on the outer side at the edge, is along a third direction at the edge, the third direction being a direction becoming more distanced from an axis than the second direction does, as the third direction is extended further toward the first direction. A flow of fluid ejected from the second open end follows the guide surface, and becomes separated from the nozzle unit at the edge.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: September 22, 2020
    Assignees: Technology Research Association for Future Additive Manufacturing, Kabushiki Kaisha Toshiba, Toshiba Kikai Kabushiki Kaisha
    Inventors: Hiroshi Ohno, Satoshi Tsuno, Mitsuo Sasaki, Tomohiko Yamada, Yasutomo Shiomi, Shimpei Fujimaki
  • Patent number: 10766523
    Abstract: Provided is a steering device which allows continued safe travel in the event of a fault during automatic steering control. The steering device is equipped with an electric drive device composed of a plurality of systems of electric motors and has an assist control function for assisting a driver in steering and an automatic steering control function for automatically controlling the steering angle of steered wheels on the basis of a steering angle instruction value.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: September 8, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takahiro Itou, Masaru Yamasaki, Mitsuo Sasaki, Kazuya Yamano
  • Patent number: 10745045
    Abstract: A power steering device includes a steering mechanism, an electric motor for applying a steering assist force to the steering mechanism, and a first motor rotational position sensor for sensing as an actual axis phase a rotational position of a rotor of the electric motor. A control device is configured to: receive input of a signal of first actual axis phase outputted from the first motor rotational position sensor; receive input of a signal of value of electric current flowing through the electric motor; estimate as a control phase a phase of an induced voltage occurring in the electric motor, based on the signal of value of electric current; and determine whether or not the first motor rotational position sensor is abnormal, based on a difference between the first actual axis phase and the control phase.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: August 18, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuo Sasaki, Takumi Hisazumi, Shigehisa Aoyagi
  • Publication number: 20200130615
    Abstract: A control device for a vehicle-mounted apparatus, the control device includes: a second CPU state judging section provided to the first CPU, and configured to judge a state of the second CPU based on a state of the inter-CPU communication and a voltage value of the electric power supplied from the first electric power supply section, or the second reset signal; and a first CPU state judging section provided to the second CPU, and configured to judge a state of the first CPU based on the state of the inter-CPU communication and a voltage value of the electric power supplied from the second electric power supply section, or the first reset signal.
    Type: Application
    Filed: May 9, 2018
    Publication date: April 30, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuo SASAKI, Masaki ITABASHI, Tadashi SUGANUMA
  • Patent number: 10625772
    Abstract: One of objects of the present invention is to provide a power steering apparatus capable of improving accuracy of abnormality detection. A power steering apparatus includes a steering mechanism configured to transmit a rotation of a steering wheel to a turning target wheel, an electric motor configured to provide a steering force to the steering mechanism, a torque sensor configured to detect a steering torque generated on the steering mechanism, and a control unit configured to calculate, based on the steering torque, an instruction signal for controlling driving of the electric motor and output the instruction signal to the electric motor.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: April 21, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuo Sasaki, Makoto Goto
  • Publication number: 20200044594
    Abstract: A brushless motor includes: a motor rotor; a stator coil section which has a plurality of energization phases, which includes a first stator coil and a second stator coil that are provided to each phase, and which is arranged to generate a magnetic field, and thereby rotate the motor rotor; and a connection switching section configured to switch a connection of the first stator coil and the second stator coil from a serial connection to a parallel connection, or from the parallel connection to the serial connection.
    Type: Application
    Filed: January 22, 2018
    Publication date: February 6, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Kohtaro SHIINO, Mitsuo SASAKI
  • Publication number: 20200023887
    Abstract: A power steering device includes a steering mechanism structured to steer a steerable wheel in accordance with steering of a steering wheel. A first sensor is structured to sense a specific state quantity of steering. A second sensor is structured to sense the specific state quantity. A first actuation part is structured to apply a steering force to the steering mechanism. A second actuation part is structured to apply a steering force to the steering mechanism. A first microprocessor is configured to receive an output signal from the first sensor, and control driving of the first actuation part based on the output signal received from the first sensor. A second microprocessor is configured to receive an output signal from the first sensor and an output signal from the second sensor, and control driving of the second actuation part based on the output signal received from the first sensor.
    Type: Application
    Filed: March 15, 2017
    Publication date: January 23, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mitsuo SASAKI, Takumi HISAZUMI
  • Patent number: 10537966
    Abstract: A machining apparatus that need not exchange a processing nozzle when changing a shaping condition, and increases the use efficiency of a material. The processing nozzle that performs processing by ejecting a processing material towards a molten pool formed on a process surface by an energy line includes a cylindrical inner housing that incorporates a path through which the energy line passes, and ejects the energy line from one end. The processing nozzle also includes a cylindrical outer housing that incorporates the inner housing, and has an inner surface tapered in the ejection direction of the energy line ejected from the inner housing. The processing nozzle also includes a slide mechanism that changes, along the energy line, the relative position of the outer housing with respect to the inner housing.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: January 21, 2020
    Assignee: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Yuji Sasaki, Hiroshi Ohno, Mitsuo Sasaki, Takashi Obara, Kazuyuki Masukawa
  • Patent number: 10532427
    Abstract: An optical processing head capable of reducing the energy loss at the time of optical processing is disclosed. The optical processing head includes a first optical element that converts light emitted by a light source into first parallel light, a second optical element that is arranged downstream of the first optical element and converts the first parallel light into first divergent light, a third optical element that is arranged downstream of the second optical element and converts the first divergent light into second parallel light, and a fourth optical element that is arranged downstream of the third optical element and converts the second parallel light into convergent light which is condensed on the processing surface side.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: January 14, 2020
    Assignee: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi Ohno, Tetsuo Sakai, Mitsuo Sasaki, Kazuyuki Masukawa, Takashi Obara, Yuji Sasaki, Satoshi Tsuno
  • Patent number: 10486739
    Abstract: Short circuit abnormality between redundant systems with respect to motor redundant systems is detected. A motor actuator includes a first inverter circuit configured to control power supplied to a first motor stator, a second inverter circuit configured to control power supplied to a second motor stator, and a control unit portion including a calculation circuit.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: November 26, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Mitsuo Sasaki
  • Patent number: 10449560
    Abstract: An optical processing nozzle that homogeneously supplies a fluid to a processing surface in optical processing. The optical processing nozzle includes a beam path that is arranged so that a beam can pass through the beam path towards a processing surface in order to perform processing using a beam guided from a light source, and a channel structure that is arranged around the beam path and is configured to eject a fluid towards the processing surface. The channel structure includes an inflow port through which the fluid flows, at least two passage holes through which the fluid flowing from the inflow port passes, a channel that guides the fluid from the inflow port to the passage holes, and an ejection port from which the fluid having passed through the at least two passage holes is ejected toward the processing surface.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: October 22, 2019
    Assignee: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING
    Inventors: Hiroshi Ohno, Yuji Sasaki, Mitsuo Sasaki, Takashi Obara, Kazuyuki Masukawa
  • Publication number: 20190291211
    Abstract: According to an embodiment, a nozzle of an additive manufacturing device includes a first inner surface that defines a first path through which an energy ray passes; and a second inner surface that defines a second path that extends along the first path and through which gas and a powder material pass. The first path opens to a leading end of the nozzle. The second path opens to near or around the first path. At least part of the second inner surface includes a first region having a larger friction coefficient for the powder material than the friction coefficient of at least one of the first inner surface and an outer peripheral surface of the leading end.
    Type: Application
    Filed: March 20, 2019
    Publication date: September 26, 2019
    Applicants: Technology Research Association for Future Additive Manufacturing, KABUSHIKI KAISHA TOSHIBA, Toshiba Kikai Kabushiki Kaisha
    Inventors: Satoshi TSUNO, Hiroshi Ohno, Mitsuo Sasaki, Tomohiko Yamada, Yasutomo Shiomi, Shimpei Fujimaki
  • Patent number: 10411621
    Abstract: In the drive device for a three-phase synchronous motor, if one of the two rotational position detectors is defective, it is necessary to identify the rotational position detector having abnormal output and is in the detective state. To do this, three or more rotational position detectors are required, which increases costs of the rotational position detectors. By comparing the outputs of two rotational position detectors, an abnormality of ether one of the two detectors is detected. The abnormal detector is identified with the use of rotational position estimating means. The drive of the three-phase synchronous motor is controlled with the use of the output ? of the properly functioning one of the first and second rotational position detectors.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: September 10, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takafumi Hara, Toshiyuki Ajima, Shigehisa Aoyagi, Mitsuo Sasaki, Takumi Hisazumi