Patents by Inventor Tomoyuki OSHIRO

Tomoyuki OSHIRO 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: 10923339
    Abstract: A multipole ion guide (30) including a plurality of rod electrodes arranged at an angle to the central axis (C) is placed within a collision cell (13) located in the previous stage of an orthogonal accelerator (16). Radio-frequency voltages with opposite phases are applied to the rod electrodes of the ion guide (30) so that any two rod electrodes neighboring each other in the circumferential direction have opposite phases of the voltage. A depth gradient of the pseudopotential is thereby formed from the entrance end toward the exit end within the space surrounded by the rod electrodes, and ions are accelerated by this gradient. During an ion-accumulating process, a direct voltage having the same polarity as the ions is applied to the exit lens electrode (132) to form a potential barrier for accumulating ions. Among the ions repelled by the potential barrier, ions having smaller m/z return closer to the entrance end.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: February 16, 2021
    Assignee: SHIMADZU CORPORATION
    Inventors: Osamu Furuhashi, Daisuke Okumura, Tomoyuki Oshiro
  • Publication number: 20210013019
    Abstract: For an automatic adjustment of a detector voltage, a measurement of a standard sample is performed, in which a reflection voltage generator under the control of an autotuning controller applies, to a reflector, voltages which are different from those applied in a normal measurement and do not cause temporal conversion of ions. Ions having the same m/z simultaneously ejected from an ejector are dispersed in the temporal direction and reach a detector. Therefore, a plurality of low peaks corresponding to individual ions are observed on a profile spectrum. A peak-value data acquirer determines a wave-height value of each peak. A wave-height-value list creator creates a list of wave-height values. A detector voltage determiner searches for a detector voltage at which the median of the wave-height values in the wave-height-value list falls within a reference range.
    Type: Application
    Filed: April 26, 2018
    Publication date: January 14, 2021
    Applicant: SHIMADZU CORPORATION
    Inventors: Tomoyuki OSHIRO, Daisuke OKUMURA, Yuta MIYAZAKI, Hiroaki KOZAWA
  • Publication number: 20200152441
    Abstract: A multipole ion guide (30) including a plurality of rod electrodes arranged at an angle to the central axis (C) is placed within a collision cell (13) located in the previous stage of an orthogonal accelerator (16). Radio-frequency voltages with opposite phases are applied to the rod electrodes of the ion guide (30) so that any two rod electrodes neighboring each other in the circumferential direction have opposite phases of the voltage. A depth gradient of the pseudopotential is thereby formed from the entrance end toward the exit end within the space surrounded by the rod electrodes, and ions are accelerated by this gradient. During an ion-accumulating process, a direct voltage having the same polarity as the ions is applied to the exit lens electrode (132) to form a potential barrier for accumulating ions. Among the ions repelled by the potential barrier, ions having smaller m/z return closer to the entrance end.
    Type: Application
    Filed: January 16, 2020
    Publication date: May 14, 2020
    Applicant: SHIMADZU CORPORATION
    Inventors: Osamu FURUHASHI, Daisuke OKUMURA, Tomoyuki OSHIRO
  • Patent number: 10573504
    Abstract: A multipole ion guide (30) including a plurality of rod electrodes arranged at an angle to the central axis (C) is placed within a collision cell (13) located in the previous stage of an orthogonal accelerator (16). Radio-frequency voltages with opposite phases are applied to the rod electrodes of the ion guide (30) so that any two rod electrodes neighboring each other in the circumferential direction have opposite phases of the voltage. A depth gradient of the pseudopotential is thereby formed from the entrance end toward the exit end within the space surrounded by the rod electrodes, and ions are accelerated by this gradient. During an ion-accumulating process, a direct voltage having the same polarity as the ions is applied to the exit lens electrode (132) to form a potential barrier for accumulating ions. Among the ions repelled by the potential barrier, ions having smaller m/z return closer to the entrance end.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: February 25, 2020
    Assignee: SHIMADZU CORPORATION
    Inventors: Osamu Furuhashi, Daisuke Okumura, Tomoyuki Oshiro
  • Patent number: 10566179
    Abstract: An orthogonal acceleration time-of-flight (TOF) mass spectrometer in which an ion injected into an orthogonal acceleration area is periodically accelerated in a direction orthogonal to a direction of the injection and thereby ejected into a flight space. The mass spectrometer includes: an orthogonal acceleration electrode; a voltage supplier for applying a fixed level of voltage to the orthogonal acceleration electrode with a predetermined period; a TOF determiner for detecting an ion after a completion of a flight of the ion within the flight space, and determining the TOF of the ion; a storage section in which mass determination information defining a relationship between the TOF and mass-to-charge ratio of the ion depending on the period of the applied voltage is stored; and a mass-to-charge-ratio determiner for determining the mass-to-charge ratio of an ion from the TOF of the ion determined by the TOF determiner, based on the mass determination information.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: February 18, 2020
    Assignee: SHIMADZU CORPORATION
    Inventor: Tomoyuki Oshiro
  • Patent number: 10475635
    Abstract: Voltages are applied by a voltage application device having an electrode circuit including a plurality of electrode connection parts connected in series via a resistance R between neighboring electrode connection parts; and power sources P for outputting both positive and negative polarities, each power source connected to both ends of the electrode circuit. The method of applying a voltage includes determining a polarity and a magnitude of an output voltage of so that a voltage having a predetermined polarity and magnitude is applied to the electrodes; and based on the polarities, switching the polarities of the output voltages by switching the polarities of the output voltages of the plurality of power sources P one at a time while maintaining a state where a polarity of an output voltage of at least one power source P, among the plurality of power sources P, is different from others.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: November 12, 2019
    Assignee: SHIMADZU CORPORATION
    Inventor: Tomoyuki Oshiro
  • Patent number: 10316845
    Abstract: The invention is directed to reducing pressure-reduction time while preventing foaming in an oil-separation device during capacity control of a compressor, and to avoid startup congestion. This oil-supply-type compressor includes a main body, an oil-separation device, and an air-discharge passage for discharging compressed air during capacity control of the compressor. The air-discharge passage includes passages having large and small flow volumes, and when compressed air is discharged from the passage to the atmosphere during capacity control, the pressure in the oil-separation device is discharged using the large-flow-volume passage, until the pressure reaches or falls below a restarting-possible pressure, which is the pressure at which startup congestion does not occur when the compressor main body is restarted.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: June 11, 2019
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Tomoyuki Kado, Ryusuke Oshiro
  • Publication number: 20190088460
    Abstract: Voltages are applied by a voltage application device having an electrode circuit including a plurality of electrode connection parts connected in series via a resistance R between neighboring electrode connection parts; and power sources P for outputting both positive and negative polarities, each power source connected to both ends of the electrode circuit. The method of applying a voltage includes determining a polarity and a magnitude of an output voltage of so that a voltage having a predetermined polarity and magnitude is applied to the electrodes; and based on the polarities, switching the polarities of the output voltages by switching the polarities of the output voltages of the plurality of power sources P one at a time while maintaining a state where a polarity of an output voltage of at least one power source P, among the plurality of power sources P, is different from others.
    Type: Application
    Filed: March 18, 2016
    Publication date: March 21, 2019
    Applicant: SHIMADZU CORPORATION
    Inventor: Tomoyuki OSHIRO
  • Publication number: 20190019664
    Abstract: A multipole ion guide (30) including a plurality of rod electrodes arranged at an angle to the central axis (C) is placed within a collision cell (13) located in the previous stage of an orthogonal accelerator (16). Radio-frequency voltages with opposite phases are applied to the rod electrodes of the ion guide (30) so that any two rod electrodes neighboring each other in the circumferential direction have opposite phases of the voltage. A depth gradient of the pseudopotential is thereby formed from the entrance end toward the exit end within the space surrounded by the rod electrodes, and ions are accelerated by this gradient. During an ion-accumulating process, a direct voltage having the same polarity as the ions is applied to the exit lens electrode (132) to form a potential barrier for accumulating ions. Among the ions repelled by the potential barrier, ions having smaller m/z return closer to the entrance end.
    Type: Application
    Filed: January 15, 2016
    Publication date: January 17, 2019
    Applicant: SHIMADZU CORPORATION
    Inventors: Osamu FURUHASHI, Daisuke OKUMURA, Tomoyuki OSHIRO
  • Publication number: 20180315589
    Abstract: An orthogonal acceleration time-of-flight (TOF) mass spectrometer in which an ion injected into an orthogonal acceleration area is periodically accelerated in a direction orthogonal to a direction of the injection and thereby ejected into a flight space. The mass spectrometer includes: an orthogonal acceleration electrode; a voltage supplier for applying a fixed level of voltage to the orthogonal acceleration electrode with a predetermined period; a TOF determiner for detecting an ion after a completion of a flight of the ion within the flight space, and determining the TOF of the ion; a storage section in which mass determination information defining a relationship between the TOF and mass-to-charge ratio of the ion depending on the period of the applied voltage is stored; and a mass-to-charge-ratio determiner for determining the mass-to-charge ratio of an ion from the TOF of the ion determined by the TOF determiner, based on the mass determination information.
    Type: Application
    Filed: October 23, 2015
    Publication date: November 1, 2018
    Applicant: SHIMADZU CORPORATION
    Inventor: Tomoyuki OSHIRO