Patents by Inventor Akira Izumi

Akira Izumi 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: 11384760
    Abstract: A lower end plate includes: bolt holes through which bolts penetrate; a lower discharge valve; a lower discharge-valve accommodating recessed portion into which the lower discharge valve is accommodated; and a lower discharge-chamber recessed portion. A lower end plate cover is provided with a bulging portion. A lower end-plate cover chamber is formed by the lower discharge-valve accommodating recessed portion, the lower discharge-chamber recessed portion, and the bulging portion. Refrigerant passage holes include main refrigerant passage holes provided on the lower discharge-chamber recessed portion, and sub-refrigerant passage holes provided between the bolt hole and the lower discharge-valve accommodating recessed portion away from the lower discharge-valve accommodating recessed portion. The bulging portion is, in a cross section orthogonal to a rotating shaft, formed so as to overlap with at least a part of each of the main refrigerant passage holes and the sub-refrigerant passage holes.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: July 12, 2022
    Assignee: FUJITSU GENERAL LIMITED
    Inventors: Akira Inoue, Kenshi Ueda, Shingo Yahaba, Yasuyuki Izumi
  • Patent number: 11303225
    Abstract: Provided is a small-sized electrostatic motor having a rotor capable of starting reliably to rotate forward. The electrostatic motor includes a rotor rotatable around a rotating shaft, charged portions formed radially around the rotating shaft on upper and lower surfaces of the rotor, first and second stators disposed to sandwich the rotor therebetween, and first sets and second sets of fixed electrodes respectively formed radially around the rotating shaft on the surfaces of the first and second stators facing the rotor and selectively energized according to drive pulses to rotate the rotor by electrostatic force generated between the charged portions and the fixed electrodes. The average number of sets of fixed electrodes simultaneously energized in one cycle of the drive pulses out of the first sets and second sets of fixed electrodes is equal to the average of the numbers of first sets and second sets of fixed electrodes.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: April 12, 2022
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Toshinari Maeda, Akira Izumi
  • Publication number: 20210352233
    Abstract: An imaging device includes: a first image sensor comprising first pixels that receive incident light, and that include a first and second photoelectric conversion units that are arranged in a first direction; and a second image sensor including second pixels that receive light that has passed through the first image sensor, and that include a third and fourth photoelectric conversion units that are arranged in a second direction that is different from the first direction.
    Type: Application
    Filed: July 22, 2021
    Publication date: November 11, 2021
    Applicant: NIKON CORPORATION
    Inventor: Akira IZUMI
  • Patent number: 11102432
    Abstract: An imaging device includes: a first image sensor comprising first pixels that receive incident light, and that include a first and second photoelectric conversion units that are arranged in a first direction; and a second image sensor including second pixels that receive light that has passed through the first image sensor, and that include a third and fourth photoelectric conversion units that are arranged in a second direction that is different from the first direction.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: August 24, 2021
    Assignee: NIKON CORPORATION
    Inventor: Akira Izumi
  • Publication number: 20200204087
    Abstract: A power generation system includes a power generation unit, a power storage unit, and a voltage step-down unit. The power generation unit includes a generation main body having an electrification film and a counter electrode rotating relative to each other to generate power, and an energy generator generating energy for rotating the electrification film and the counter electrode. The power storage unit stores output power of the power generation unit. The voltage step-down unit is electrically connected to the power generation unit and the power storage unit and reduces output voltage of the power generation unit to a step-down voltage. The step-down voltage obtained by dividing the most energy-efficiently generated output voltage of the power generation unit by a step-down ratio of the voltage step-down unit coincides with storage voltage corresponding to a region between first and second turning points on a discharge curve of the power storage unit.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Shogo Kimura, Akira Shiota, Makoto Watanabe, Akira Izumi
  • Patent number: 10644615
    Abstract: An electrostatic induction generator includes a housing, a first board fixed to the housing, and a second board arranged in parallel to the first board to be able move relative to it, in which electrostatic induction generator, counter electrodes are placed at a first facing surface of the first board, electrically charged films are placed at every other constant interval at a second facing surface of the second board so as to face the counter electrodes, the counter electrodes are comprised of pluralities of first electrodes and second electrodes provided separated from each other at the first facing surface, first electrodes and second electrodes are alternately arranged at constant intervals in a single line, a plurality of lines of single lines of the first electrodes and second electrodes are provided at the first facing surface, and the constant intervals of the plurality of lines respectively differ in phase.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: May 5, 2020
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Yoichi Nagata, Akira Shiota, Makoto Watanabe, Akira Izumi, Takashi Ihara
  • Publication number: 20200106949
    Abstract: An imaging device includes: a first image sensor comprising first pixels that receive incident light, and that include a first and second photoelectric conversion units that are arranged in a first direction; and a second image sensor including second pixels that receive light that has passed through the first image sensor, and that include a third and fourth photoelectric conversion units that are arranged in a second direction that is different from the first direction.
    Type: Application
    Filed: November 4, 2019
    Publication date: April 2, 2020
    Applicant: NIKON CORPORATION
    Inventor: Akira IZUMI
  • Publication number: 20200076327
    Abstract: Provided is a small-sized electrostatic motor having a rotor capable of starting reliably to rotate forward. The electrostatic motor includes a rotor rotatable around a rotating shaft, charged portions formed radially around the rotating shaft on upper and lower surfaces of the rotor, first and second stators disposed to sandwich the rotor therebetween, and first sets and second sets of fixed electrodes respectively formed radially around the rotating shaft on the surfaces of the first and second stators facing the rotor and selectively energized according to drive pulses to rotate the rotor by electrostatic force generated between the charged portions and the fixed electrodes. The average number of sets of fixed electrodes simultaneously energized in one cycle of the drive pulses out of the first sets and second sets of fixed electrodes is equal to the average of the numbers of first sets and second sets of fixed electrodes.
    Type: Application
    Filed: March 22, 2018
    Publication date: March 5, 2020
    Inventors: Toshinari MAEDA, Akira IZUMI
  • Patent number: 10566913
    Abstract: Provided is an electric power generating device capable of performing electret power generation by efficiently rotating a rotating electrode group.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: February 18, 2020
    Assignee: Citizen Watch Co., LTD.
    Inventors: Kensaku Matsumoto, Takashi Ihara, Makoto Watanabe, Akira Izumi
  • Patent number: 10511760
    Abstract: An imaging device includes: a first image sensor comprising first pixels that receive incident light, and that include a first and second photoelectric conversion units that are arranged in a first direction; and a second image sensor including second pixels that receive light that has passed through the first image sensor, and that include a third and fourth photoelectric conversion units that are arranged in a second direction that is different from the first direction.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: December 17, 2019
    Assignee: NIKON CORPORATION
    Inventor: Akira Izumi
  • Patent number: 10361642
    Abstract: Provided is an electronic device including a rotary power generation device using an electret, which is capable of preventing a spiral spring from being wound up or fully extended. The electronic device includes a power generation mechanism including: first rotary member, which is supported in a freely rotatable manner, and has a center of gravity shifted from a rotation center; second rotary member supported in a freely rotatable manner; an elastic member configured to elastically connect the first rotary member and the second rotary member to each other for rotary motions thereof; a stationary member arranged so as to be opposed to the second rotary member; and an electret film formed on a surface of any one of the second rotary member and the stationary member.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: July 23, 2019
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Kensaku Matsumoto, Takashi Ihara, Makoto Watanabe, Akira Izumi
  • Patent number: 10348219
    Abstract: A board arrangement structure includes a housing, a first board fastened to the housing, a second board arranged in parallel enabling, relative movement with respect to the first board, an electrically charged film, a counter electrode, and an output part outputting electric power generated between the electrically charged film and the counter electrode, at least one of the electrically charged film and the counter electrode being arranged at a first facing surface of the first board and the other being arranged at a second facing surface of the second board facing the first facing surface, and the first facing surface of the first board being, fastened to a reference mounting surface provided at the housing.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: July 9, 2019
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Akira Izumi, Takashi Ihara, Makoto Watanabe
  • Patent number: 10222761
    Abstract: An electronic watch or clock with an electrostatic induction generator, wherein the electrostatic induction generator has a rotary weight able to rotate with respect to a housing, a rotary member able to rotate with respect to the housing, a counter substrate fastened to the housing, a charging film arranged at one of the rotary member and counter substrate, and a counter electrode arranged facing the charging film at the other, outputs electric power generated between the charging film and the counter electrode to a quartz movement, and provides a window part at one or more locations among the dial plate, housing, or outside casing to enable rotation of the rotary member or transmission of rotation to be visually confirmed.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: March 5, 2019
    Assignee: CITIZEN WATCH CO., LTD.
    Inventors: Takashi Ihara, Akira Izumi, Makoto Watanabe
  • Publication number: 20180063410
    Abstract: An imaging device includes: a first image sensor comprising first pixels that receive incident light, and that include a first and second photoelectric conversion units that are arranged in a first direction; and a second image sensor including second pixels that receive light that has passed through the first image sensor, and that include a third and fourth photoelectric conversion units that are arranged in a second direction that is different from the first direction.
    Type: Application
    Filed: March 23, 2016
    Publication date: March 1, 2018
    Applicant: NIKON CORPORATION
    Inventor: Akira IZUMI
  • Publication number: 20180026552
    Abstract: An electrostatic induction generator includes a housing, a first board fixed to the housing, and a second board arranged in parallel to the first board to be able move relative to it, in which electrostatic induction generator, counter electrodes are placed at a first facing surface of the first board, electrically charged films are placed at every other constant interval at a second facing surface of the second board so as to face the counter electrodes, the counter electrodes are comprised of pluralities of first electrodes and second electrodes provided separated from each other at the first facing surface, first electrodes and second electrodes are alternately arranged at constant intervals in a single line, a plurality of lines of single lines of the first electrodes and second electrodes are provided at the first facing surface, and the constant intervals of the plurality of lines respectively differ in phase.
    Type: Application
    Filed: January 5, 2016
    Publication date: January 25, 2018
    Inventors: Yoichi NAGATA, Akira SHIOTA, Makoto WATANABE, Akira IZUMI, Takashi IHARA
  • Publication number: 20170269557
    Abstract: An electronic watch or clock with an electrostatic induction generator, wherein the electrostatic induction generator has a rotary weight able to rotate with respect to a housing, a rotary member able to rotate with respect to the housing, a counter substrate fastened to the housing, a charging film arranged at one of the rotary member and counter substrate, and a counter electrode arranged facing the charging film at the other, outputs electric power generated between the charging film and the counter electrode to a quartz movement, and provides a window part at one or more locations among the dial plate, housing, or outside casing to enable rotation of the rotary member or transmission of rotation to be visually confirmed.
    Type: Application
    Filed: August 13, 2015
    Publication date: September 21, 2017
    Inventors: Takashi IHARA, Akira IZUMI, Makoto WATANABE
  • Publication number: 20170133952
    Abstract: Provided is an electric power generating device capable of performing electret power generation by efficiently rotating a rotating electrode group.
    Type: Application
    Filed: March 19, 2015
    Publication date: May 11, 2017
    Applicant: CITIZEN HOLDINGS CO., LTD.
    Inventors: Kensaku MATSUMOTO, Takashi IHARA, Makoto WATANABE, Akira IZUMI
  • Publication number: 20170110988
    Abstract: A board arrangement structure includes a housing, a first board fastened to the housing, a second board arranged in parallel enabling, relative movement with respect to the first board, an electrically charged film, a counter electrode, and an output part outputting electric power generated between the electrically charged film and the counter electrode, at least one of the electrically charged film and the counter electrode being arranged at a first facing surface of the first board and the other being arranged at a second facing surface of the second board facing the first facing surface, and the first facing surface of the first board being, fastened to a reference mounting surface provided at the housing.
    Type: Application
    Filed: February 27, 2015
    Publication date: April 20, 2017
    Applicant: CITIZEN HOLDINGS CO., LTD.
    Inventors: Akira IZUMI, Takashi IHARA, Makoto WATANABE
  • Publication number: 20170019035
    Abstract: Provided is an electronic device including a rotary power generation device using an electret, which is capable of preventing a spiral spring from being wound up or fully extended. The electronic device includes a power generation mechanism including: first rotary member, which is supported in a freely rotatable manner, and has a center of gravity shifted from a rotation center; second rotary member supported in a freely rotatable manner; an elastic member configured to elastically connect the first rotary member and the second rotary member to each other for rotary motions thereof; a stationary member arranged so as to be opposed to the second rotary member; and an electret film formed on a surface of any one of the second rotary member and the stationary member.
    Type: Application
    Filed: March 26, 2015
    Publication date: January 19, 2017
    Inventors: Kensaku MATSUMOTO, Takashi IHARA, Makoto WATANABE, Akira IZUMI
  • Patent number: 9431276
    Abstract: A rinsing liquid (DIW) is discharged from a rinsing liquid discharge port formed in a blocking member to perform rinsing processing to a substrate surface while a nitrogen gas is supplied into a clearance space, and a liquid mixture (IPA+DIW) is discharged from a liquid mixture discharge port formed in the blocking member to replace the rinsing liquid adhering to the substrate surface with the liquid mixture while the nitrogen gas is supplied into the clearance space. Thus, an increase of the dissolved oxygen concentration of the liquid mixture can be suppressed upon replacing the rinsing liquid adhering to the substrate surface with the liquid mixture, which makes it possible to securely prevent from forming an oxide film or generating watermarks on the substrate surface.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: August 30, 2016
    Assignee: SCREEN Holdings Co., Ltd.
    Inventors: Katsuhiko Miya, Akira Izumi