Patents by Inventor Yohei Nakamura

Yohei Nakamura 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: 20200077979
    Abstract: Provided is a probe which transmits an ultrasonic wave to a diagnostic site and receives a reception signal which is a reflected wave.
    Type: Application
    Filed: March 22, 2019
    Publication date: March 12, 2020
    Inventors: Yutaka IGARASHI, Shinya KAJIYAMA, Yohei NAKAMURA, Kengo IMAGAWA, Kazuhiro AMINO, Takayuki IWASHITA
  • Patent number: 10583662
    Abstract: Ink is supplied to a print head through a pressure compensation mechanism and a common collection flow path in a case where a predetermined differential pressure or higher between a pressure in a common supply flow path of the print head and a pressure in a common collection flow path of the print head is generated. As a result, liquid refillability for the liquid ejection head is improved while retaining a liquid circulating function in the liquid ejection head so as to stabilize a liquid ejecting state in the liquid ejection head.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: March 10, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Yamada, Yohei Nakamura, Yoshiyuki Nakagawa, Naozumi Nabeshima
  • Patent number: 10554217
    Abstract: Provided is a sensor terminal including a sensor element, the sensor terminal further including: an ADC that converts an analog signal output from a sensor element into a digital signal; a storage device in which a plurality of first storage setting numbers being information for controlling the ADC and a plurality of pieces of first characteristic information including description of operation of the ADC are stored in association with each other; and a communication device that receives a first reception setting number from the outside of the sensor terminal, and transmits the first characteristic information corresponding to the first storage setting number that coincides with the first reception setting number, to the outside of the sensor terminal.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: February 4, 2020
    Assignee: HITACHI, LTD.
    Inventors: Yohei Nakamura, Taizo Yamawaki
  • Patent number: 10538087
    Abstract: The liquid ejecting head includes a first individual flow path and a second individual flow path for supplying liquid to a pressure chamber, a first common flow path for supplying liquid to the first individual flow path, and a second common flow path for supplying liquid to the second individual flow path. A first circulation for causing liquid to flow in the order of the first individual flow path, the pressure chamber, and the second individual flow path and a second circulation for causing liquid to flow in the reverse order of the first circulation are switched. A flow path resistance of the first common flow path is designed to be less than a flow path resistance of the second common flow path and a flow path resistance of the first individual flow path is designed to be less than a flow path resistance of the second individual flow path.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: January 21, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Yohei Nakamura, Naozumi Nabeshima
  • Patent number: 10493750
    Abstract: A liquid ejection apparatus includes a supply control section that controls the supply and stop of a liquid to pressure chambers communicating with ejection ports to eject the liquid, and a negative pressure generating section that generates a negative pressure. The liquid ejection apparatus also includes a negative pressure control unit using the negative pressure generated by the negative pressure generating section to adjust the pressure of the liquid flowing through a collection channel. To stop a flow of the liquid, the supply control section stops the supply of the liquid, and then the negative pressure generating section is stopped.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: December 3, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yohei Nakamura, Kazuhiro Yamada, Toru Nakakubo, Yoshiyuki Nakagawa, Naozumi Nabeshima
  • Patent number: 10486546
    Abstract: A torque control method for controlling torque of a motor, comprises detecting request of speed control requested from a driver by using a sensor, calculating a request torque based on the request, performing, controlling torque generated at the motor based on the request torque, when the request torque is smaller than a predetermined torque threshold value, a coast traveling control for setting the request torque to zero and controlling the motor based on the request torque which is set to zero.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: November 26, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Takahisa Kurosawa, Yohei Nakamura
  • Publication number: 20190344567
    Abstract: There is provided a liquid ejection head whose resolution may be enhanced without narrowing a wiring pitch, and a manufacturing method thereof. To that end, integrated circuits are arranged on a same substrate as that of piezoelectric elements.
    Type: Application
    Filed: April 16, 2019
    Publication date: November 14, 2019
    Inventors: Yohei Nakamura, Toru Nakakubo
  • Publication number: 20190328369
    Abstract: Provided is a probe which transmits an ultrasonic wave to a diagnostic site and receives a reception signal which is a reflected wave.
    Type: Application
    Filed: March 22, 2019
    Publication date: October 31, 2019
    Inventors: Yutaka IGARASHI, Shinya KAJIYAMA, Yohei NAKAMURA, Kengo IMAGAWA, Kazuhiro AMINO, Takayuki IWASHITA
  • Publication number: 20190241075
    Abstract: A torque control method for controlling torque of a motor, comprises detecting request of speed control requested from a driver by using a sensor, calculating a request torque based on the request, performing, controlling torque generated at the motor based on the request torque, when the request torque is smaller than a predetermined torque threshold value, a coast traveling control for setting the request torque to zero and controlling the motor based on the request torque which is set to zero.
    Type: Application
    Filed: July 15, 2016
    Publication date: August 8, 2019
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Takahisa KUROSAWA, Yohei NAKAMURA
  • Publication number: 20190199366
    Abstract: Provided is a sensor terminal including a sensor element, the sensor terminal further including: an ADC that converts an analog signal output from a sensor element into a digital signal; a storage device in which a plurality of first storage setting numbers being information for controlling the ADC and a plurality of pieces of first characteristic information including description of operation of the ADC are stored in association with each other; and a communication device that receives a first reception setting number from the outside of the sensor terminal, and transmits the first characteristic information corresponding to the first storage setting number that coincides with the first reception setting number, to the outside of the sensor terminal.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 27, 2019
    Applicant: HITACHI, LTD.
    Inventors: Yohei NAKAMURA, Taizo YAMAWAKI
  • Patent number: 10312932
    Abstract: The resolution of a successive approximation analog-to-digital converter is varied in a wide range. Provided is a successive approximation analog-to-digital converter including a digital-to-analog converter that generates an analog voltage based on a digital code, a comparator to which the analog voltage as the output of the digital-to-analog converter is inputted, a DAC control circuit that generates the digital code of an input voltage sampled from an external clock signal by successively changing the digital code based on the output of the comparator, a delay circuit that starts the determination of the comparator by signal transition generated by delaying the signal state change of the output of the comparator, a clock generation circuit that generates a signal starting the determination of the comparator, and a selector circuit that selects a signal generated by the delay circuit or a signal generated by the clock generation circuit to feed the selected signal to the comparator.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: June 4, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Yohei Nakamura, Taizo Yamawaki
  • Publication number: 20190100024
    Abstract: A liquid ejection apparatus includes an ejection port ejecting a liquid, a pressure chamber storing the liquid, an element generating energy for ejecting the liquid in the pressure chamber, first and second tanks which can store the liquid, a flow passage establishing communication between the first and second tanks through the pressure chamber, a switching unit switching a flowing direction of the liquid in the flow passage between a first direction from the first tank to the second tank and a second direction being opposite to the first direction, and a pressure compensation unit. When a pressure in a downstream side flow passage portion downstream of the pressure chamber has a predetermined pressure or below, the pressure compensation unit compensates for reduction in pressure in the downstream side flow passage portion by supplying the liquid to the downstream side flow passage portion.
    Type: Application
    Filed: September 24, 2018
    Publication date: April 4, 2019
    Inventors: Kazuhiro Yamada, Yohei Nakamura, Yoshiyuki Nakagawa, Naozumi Nabeshima
  • Publication number: 20190100025
    Abstract: A liquid ejection apparatus capable of suppressing the amount of liquid to discharge by recovery processing is provided. The liquid ejection apparatus includes: a first path fluidly connected to an ejection port unit and provided with a deformable region; and a second path fluidly connected to the first path via the ejection port unit and provided with a deformable region. Here, a flow of liquid is generated between the first path and the second path by a displacement unit.
    Type: Application
    Filed: September 5, 2018
    Publication date: April 4, 2019
    Inventors: Naozumi Nabeshima, Kazuhiro Yamada, Yohei Nakamura, Yoshiyuki Nakagawa
  • Publication number: 20190092011
    Abstract: The liquid ejecting head includes a first individual flow path and a second individual flow path for supplying liquid to a pressure chamber, a first common flow path for supplying liquid in common to the plurality of first individual flow paths, and a second common flow path for supplying liquid in common to the plurality of second individual flow paths. A first circulation for causing liquid to flow in the order of the first individual flow path, the pressure chamber, and the second individual flow path and second circulation for causing liquid to flow in the reverse order of the first circulation are switched. A flow path resistance of the first common flow path is designed to be less than a flow path resistance of the second common flow path and a flow path resistance of the first individual flow path is designed to be less than a flow path resistance of the second individual flow path.
    Type: Application
    Filed: September 5, 2018
    Publication date: March 28, 2019
    Inventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Yohei Nakamura, Naozumi Nabeshima
  • Publication number: 20190092036
    Abstract: Ink is supplied to a print head through a pressure compensation mechanism and a common collection flow path in a case where a predetermined differential pressure or higher between a pressure in a common supply flow path of the print head and a pressure in a common collection flow path of the print head is generated. As a result, liquid refillability for the liquid ejection head is improved while retaining a liquid circulating function in the liquid ejection head so as to stabilize a liquid ejecting state in the liquid ejection head.
    Type: Application
    Filed: September 24, 2018
    Publication date: March 28, 2019
    Inventors: Kazuhiro Yamada, Yohei Nakamura, Yoshiyuki Nakagawa, Naozumi Nabeshima
  • Publication number: 20190074845
    Abstract: The resolution of a successive approximation analog-to-digital converter is varied in a wide range. Provided is a successive approximation analog-to-digital converter including a digital-to-analog converter that generates an analog voltage based on a digital code, a comparator to which the analog voltage as the output of the digital-to-analog converter is inputted, a DAC control circuit that generates the digital code of an input voltage sampled from an external clock signal by successively changing the digital code based on the output of the comparator, a delay circuit that starts the determination of the comparator by signal transition generated by delaying the signal state change of the output of the comparator, a clock generation circuit that generates a signal starting the determination of the comparator, and a selector circuit that selects a signal generated by the delay circuit or a signal generated by the clock generation circuit to feed the selected signal to the comparator.
    Type: Application
    Filed: March 19, 2018
    Publication date: March 7, 2019
    Inventors: Yohei NAKAMURA, Taizo YAMAWAKI
  • Publication number: 20190009524
    Abstract: A liquid ejection apparatus includes a supply control section 401 that controls the supply and stop of a liquid to pressure chambers communicating with ejection ports to eject the liquid, and a negative pressure generating section 1004 that generates a negative pressure. The liquid ejection apparatus also includes a negative pressure control unit 230 using the negative pressure generated by the negative pressure generating section 1004 to adjust the pressure of the liquid flowing through a collection channel. To stop a flow of the liquid, the supply control section 401 stops the supply of the liquid, and then the negative pressure generating section 1004 is stopped.
    Type: Application
    Filed: July 3, 2018
    Publication date: January 10, 2019
    Inventors: Yohei Nakamura, Kazuhiro Yamada, Toru Nakakubo, Yoshiyuki Nakagawa, Naozumi Nabeshima
  • Publication number: 20190004115
    Abstract: A battery management device includes: an SOCv calculation unit that calculates a state of charge using voltage across both ends of a battery; an SOCi calculation unit calculates a state of charge by integrating currents flowing in the battery; an SOCw calculation unit performs weighted addition of the battery's state of charges calculated by the SOCv and the SOCi calculation unit. An SOCi biased time calculation unit calculates an SOCi biased time based on one or a plurality of elapsed time from the end of a previous system operation or the end of charging or discharging during the previous system operation to the start of the current system, temperature, degree of degradation, and polarization voltage of the battery. The SOCw increases a weight of the state of charge of the battery calculated by the SOCi calculation while the elapsed time from the activation is within the SOCi biased time.
    Type: Application
    Filed: January 10, 2017
    Publication date: January 3, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yohei NAKAMURA, Keiichiro OHKAWA
  • Patent number: 10076959
    Abstract: A vehicle regenerative braking control device is provided for a vehicle, which comprises wheels and a motor that brakes and drives the wheels. In this way, the vehicle travels by the motor driving the wheels, and brakes by applying a braking force to the wheels with a regenerative braking force of the motor. The vehicle regenerative braking control device comprises a vehicle controller configured to control the motor such that the regenerative braking force is to be decreased at a steady rate during a predetermined time before a state-of-charge of a battery used as a power source of the motor decreases to a level at which the regenerative braking force can no longer be generated as predetermined.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: September 18, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Yohei Nakamura
  • Patent number: 10076906
    Abstract: A liquid discharge head includes an element substrate, a liquid supply substrate, a photosensitive resin layer with which the element substrate and the liquid supply substrate are adhered, and a liquid inflow through-hole penetrating the element substrate, the photosensitive resin layer, and the liquid supply substrate. The element substrate includes a pressure chamber including a discharge opening that discharges liquid, a liquid supply passage, in which one end is connected to the pressure chamber and another end is connected to the liquid inflow through-hole, the liquid supply passage supplying the liquid supplied from the liquid inflow through-hole to the pressure chamber, a diaphragm that forms a surface that opposes the discharge opening of the pressure chamber, a piezoelectric transducer that applies vibration to the diaphragm, and a partition portion, in which one surface opposes the liquid supply passage and another surface opposes the photosensitive resin layer through the diaphragm.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: September 18, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yohei Nakamura