Patents by Inventor Yoshiyuki Maki

Yoshiyuki Maki 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: 10871573
    Abstract: A timing signal output device includes a receiver configured to output a reference signal on the basis of satellite signals received from a plurality of positioning satellites, an oscillator configured to output a clock signal, and a processor configured to switch, on the basis of statistical value information concerning a statistical value obtained by performing statistical processing of elevation angles of the plurality of positioning satellites, a first mode for generating a timing signal based on the reference signal and a second mode for generating a timing signal based on the clock signal.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: December 22, 2020
    Inventors: Jun Shiina, Yoshiyuki Maki
  • Patent number: 10812092
    Abstract: A frequency signal generation device includes a substrate, a light source that is disposed on a surface of the substrate, and an atom cell that is disposed on the surface of the substrate. The atom cell contains gaseous alkali metal atoms and includes a first portion through which light emitted from the light source passes, a second portion housing a liquid alkali metal atom, and a third portion which connects the first portion to the second portion. A marker is provided that indicates a direction in which the liquid alkali metal atoms move to the third portion by gravity when the surface is vertically oriented.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: October 20, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Yoshiyuki Maki
  • Patent number: 10804915
    Abstract: An atomic oscillator includes: a light emitting element; a temperature control element that controls a temperature of the light emitting element; an atomic cell which is irradiated with a light from the light emitting element and in which an alkali metal atom is contained; a light detection element that detects a light transmitted through the atomic cell; an oscillator that outputs an oscillation signal; a wave detection circuit that detects a wave of a signal, which is based on an output of the light detection element, using the oscillation signal of the oscillator, and outputs a wave detection signal; and a drive circuit that includes a constant current circuit generating a current of a specified value for driving the light emitting element and superimposes a modulation current, which is based on the oscillation signal of the oscillator, on the current to output a drive current to the light emitting element.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: October 13, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoshiyuki Maki, Hiroyuki Yoshida, Noriaki Tanaka, Noritaka Ide
  • Publication number: 20200313683
    Abstract: An atomic oscillator includes an atom cell that includes walls defining an internal space in which alkali metal atoms are contained, a light emitting element that emits light for exciting the alkali metal atoms, and a light detecting element that detects the light transmitted through the atom cell, in which the atom cell includes a first portion in which gaseous alkali metal atoms are contained and through which light from the light emitting element passes along an x-axis, a second portion in which liquid or solid alkali metal atoms are contained, and a third portion that is positioned between the first portion and the second portion and couples the first portion and the second portion, and in the third portion, a distance between two walls facing each other along a y-axis orthogonal to the x-axis decreases from the first portion toward the second portion along the y-axis at a constant decrease rate.
    Type: Application
    Filed: March 27, 2020
    Publication date: October 1, 2020
    Inventors: Yukihiro HASHI, Kimio NAGASAKA, Yoshiyuki MAKI, Takemi YONEZAWA
  • Patent number: 10782415
    Abstract: A timing signal generation device includes: an output terminal that outputs a standard signal; a first standard signal generation unit that generates a first standard signal based on a reference signal input from outside; a second standard signal generation unit that generates a second standard signal based on a signal output from an oscillator; and a control unit that switches the standard signal output from the output terminal from the first standard signal to the second standard signal based on prior information indicating that accuracy of the reference signal deteriorates.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: September 22, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Yoshiyuki Maki, Hiroyuki Shimada
  • Publication number: 20200289787
    Abstract: A support system, a support method, and a support program in the form of a non-transitory computer readable medium, which supports selection of a medical instrument and selection of a use form of the medical instrument. A support system includes the data acquisition unit that acquires health care worker data on a health care worker, medical institution data on a medical institution, patient data on a patient, and operation data on a past operation experience of the health care worker, a learning unit that performs machine learning using the health care worker data, the medical institution data, the patient data, and the operation data, and a presentation unit that presents a medical instrument recommended for use in operation on the patient and a recommended use form of the medical instrument based on a result of the machine learning.
    Type: Application
    Filed: May 29, 2020
    Publication date: September 17, 2020
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yoshiyuki HARA, Yuuki SAKAGUCHI, Toshio MAKI, Yuusuke SEKINE
  • Publication number: 20200289215
    Abstract: A support system, a support method, and a support program in the form of a non-transitory computer readable medium are disclosed that support a medical action during an operation. The support system includes a data acquisition unit configured to acquire, during an operation, use state data on a use state of a medical device during the operation, and target lesion data on a target lesion of a patient during the operation, a learning unit configured to perform machine learning using the use state data and the target lesion data, and a presentation unit configured to present a recommended operation policy based on a result of the machine learning.
    Type: Application
    Filed: May 29, 2020
    Publication date: September 17, 2020
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Toshio MAKI, Yoshiyuki HARA, Osamu NOMURA, Yuuki SAKAGUCHI, Yuusuke SEKINE
  • Patent number: 10700690
    Abstract: A timing signal generation device includes a GPS receiver, an atomic oscillator, a phase comparator, a frequency abnormality determination unit, a sensor unit, and a determination unit. The GPS receiver outputs 1 PPS. The atomic oscillator 30 outputs a clock signal for synchronization with 1 PPS. The phase comparator compares 1 PPS and the clock signal in phase. The frequency abnormality determination unit determines whether or not the frequency of the clock signal is abnormal, by using a comparison result of the phase comparator, and outputs frequency abnormality information including a determination result. The sensor unit detects environment information which has an influence on the comparison result. The determination unit determines a cause of the abnormality by using the frequency abnormality information and the environment information.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: June 30, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Yoshiyuki Maki
  • Patent number: 10566983
    Abstract: An atomic oscillator includes: an atomic cell in which alkali metal atoms are sealed; a light source that radiates first light and second light with different frequencies to the atomic cell; a light detector that detects the first light and the second light transmitted through the atomic cell and outputs a detection signal according to a detection intensity; a signal generator that generates a microwave signal according to a transition frequency between two ground levels of the alkali metal atoms based on a result obtained by detecting the detection signal for each first period; and a light source adjuster that adjusts the frequencies of the first light and the second light for each second period, the second period being longer than the first period.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: February 18, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Yoshiyuki Maki, Noriaki Tanaka
  • Publication number: 20200044658
    Abstract: An atomic oscillator includes: a light emitting element; a temperature control element that controls a temperature of the light emitting element; an atomic cell which is irradiated with a light from the light emitting element and in which an alkali metal atom is contained; a light detection element that detects a light transmitted through the atomic cell; an oscillator that outputs an oscillation signal; a wave detection circuit that detects a wave of a signal, which is based on an output of the light detection element, using the oscillation signal of the oscillator, and outputs a wave detection signal; and a drive circuit that includes a constant current circuit generating a current of a specified value for driving the light emitting element and superimposes a modulation current, which is based on the oscillation signal of the oscillator, on the current to output a drive current to the light emitting element.
    Type: Application
    Filed: August 5, 2019
    Publication date: February 6, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoshiyuki MAKI, Hiroyuki YOSHIDA, Noriaki TANAKA, Noritaka IDE
  • Patent number: 10523226
    Abstract: A quantum interference device includes a base having a mounting surface, an atom cell in which alkali metal atoms are encapsulated, a light source adapted to emit light adapted to excite the alkali metal atoms, a photodetector adapted to detect the light having been transmitted through the atom cell, and a support adapted to support the atom cell, the light source, and the photodetector in a lump with respect to the mounting surface in a state in which the atom cell, the light source, and the photodetector are arranged in a direction along the mounting surface.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: December 31, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Yoshiyuki Maki
  • Publication number: 20190301452
    Abstract: A vane pump includes a pump rotor having a through hole to which a driving shaft is coupled, a pump housing configured to accommodate the pump rotor and the cam ring, and a first side plate provided between the pump rotor and a bottom surface of the pump housing. The first side plate or the pump housing is formed with a projection, the projection is inserted into the through hole of the pump rotor.
    Type: Application
    Filed: November 8, 2017
    Publication date: October 3, 2019
    Applicant: KYB Corporation
    Inventors: Koichiro AKATSUKA, Yoshiyuki MAKI
  • Patent number: 10396809
    Abstract: An atomic cell is filled with an alkali metal therein and includes an inner wall which is formed from a material containing a compound having a polar group, a first coating layer which coats the inner wall and is formed from a first molecule having a nonpolar group and a functional group that undergoes an elimination reaction with the polar group, and a second coating layer which coats the first coating layer and is formed from a nonpolar second molecule, wherein the second molecule is polypropylene, polyethylene, or polymethylpentene.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: August 27, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Nobuhito Hayashi, Takuya Miyakawa, Naoki Ishihara, Yoshiyuki Maki
  • Patent number: 10396810
    Abstract: A quantum interference device includes an atomic cell, a light source, a light detector, a package, and a reflective portion. The atomic cell has alkali metal atoms disposed within, and the light source emits light to excite the alkali metal atoms in the atomic cell. The light detector detects light transmitted through the atomic cell. The package defines an internal space and houses at least the light source. The reflective portion is provided between an inner surface of the package and the light source, and has reflectance to an electromagnetic wave having a wavelength of 4 ?m, where the reflectance is greater than or equal to 50%.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: August 27, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Yoshiyuki Maki, Nobuhito Hayashi
  • Patent number: 10348318
    Abstract: A light-emitting element module includes a light-emitting element that emits light, a base that has a depression portion in which the light-emitting element is accommodated, and a lid that covers an opening of the depression portion and is joined to the base. The lid includes a protrusion portion that protrudes on an opposite side to the base and has a hole through which the light passes and a window that is installed in the protrusion portion to block the hole and transmits the light. A surface of the window on a side of the light-emitting element is inclined with respect to a surface perpendicular to an optical axis of the light.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: July 9, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Yoshiyuki Maki, Tsunenori Shibata, Koji Chindo
  • Patent number: 10333536
    Abstract: An atomic oscillator includes: an atomic cell in which an alkali metal is sealed; a light-emitting element that emits light to be radiated to the atomic cell; a light-receiving element that detects the light transmitted through the atomic cell; a first optical element that has light transmittance and is disposed between the atomic cell and the light-emitting element; and a second optical element that has light transmittance and is disposed between the first optical element and the atomic cell. The first optical element reflects the light from the light-emitting element toward the light-emitting element in a first direction inclined with respect to an optical axis of the light. The second optical element reflects the light from the light-emitting element toward the light-emitting element in a second direction inclined in a direction different from the first direction with respect to the optical axis of the light.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: June 25, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Yoshiyuki Maki, Koji Chindo
  • Patent number: 10326461
    Abstract: A quantum interference device has an atomic cell which has alkali metal atoms disposed within. A light source emits light to excite the alkali metal atoms in the atomic cell. An optical element is disposed between the light source and the atomic cell, and enlarges the radiation angle of light emitted from the light source. A light detector detects light transmitted through the atomic cell.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: June 18, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Nobuhito Hayashi, Yoshiyuki Maki
  • Patent number: 10312924
    Abstract: A timing signal generation device includes a GPS receiver, an atomic oscillator, a phase comparator, a loop filter, and a divider, a temperature sensor, a DDS, and a DSP. The GPS receiver outputs a reference timing signal. The atomic oscillator outputs a clock signal in accordance with an input voltage value. The phase comparator, the loop filter, and the divider adjust the voltage value in accordance with a synchronization status between the reference timing signal and the clock signal. The temperature sensor outputs a signal depending on the temperature of the atomic oscillator. The DDS converts the frequency of the clock signal and outputs a signal obtained by converting the frequency. The DSP controls the DDS based on an output of the temperature sensor.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: June 4, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Yoshiyuki Maki, Hiroyuki Shimada
  • Patent number: 10270458
    Abstract: A quantum interference device includes an atom cell, a light source emits light to the alkali metal atoms, a photodetector that detects the light transmitted through the atom cell, a thermal conductor, which is disposed so as to straddle the light source side and the photodetector side of the atom cell, and the thermal conductor having higher thermal conductively than the atom cell, and a support, which is disposed so as to be separated from the thermal conductor, and supports the atom cell, the light source, the photodetector, and the thermal conductor in a lump, the support having lower thermal conductivity than the thermal conductor.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: April 23, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoshiyuki Maki, Nobuhito Hayashi
  • Publication number: 20190072091
    Abstract: A vane pump includes a rotor that is rotationally driven; vanes inserted into the rotor in a freely slidable manner; pump chambers that are defined between the vanes at adjacent positions; suction ports that guide working oil to the pump chambers; suction pressure chamber that is communicated with the suction ports and that stores the working oil; and a suction passage that is connected to the suction pressure chamber and that has an suction opening end that opens at an outer surface of a pump body. In a state in which the vane pump is mounted, the suction pressure chamber is mounted below the suction opening end of the suction passage.
    Type: Application
    Filed: September 20, 2016
    Publication date: March 7, 2019
    Applicant: KYB Corporation
    Inventors: Yoshiyuki MAKI, Tomoyuki NAKAGAWA, Masamichi SUGIHARA