Patents by Inventor Tatsuya Kubo

Tatsuya Kubo 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: 12128967
    Abstract: To provide a control apparatus for AC rotary machine and an electric power steering apparatus which can reduce the error component of the current detection value close to the mechanical resonance period of AC rotary machine. A control apparatus for AC rotary machine detects currents which flow into three-phase windings at a current detection period which is a first natural number times of a carrier period; calculates current detection values, by performing a current addition processing which adds current detection values detected at this time, and current detection values detected before an addition period which is a second natural number times of the current detection period; and calculates the voltage command values of three-phase based on the current detection values after current addition processing, wherein the second natural number is set to a natural number that the addition period becomes the closest to the half period of the mechanical resonance period.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: October 29, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Mori, Kenta Kubo, Itaru Iki, Yu Hirotani
  • Patent number: 12132423
    Abstract: To provide a controller for AC rotary electric machine which can suppress the increase in the unwanted sound while reducing noise. A controller for AC rotary electric machine switches n pieces of zero phase candidate voltage values in order for every switching period and calculate as a zero phase voltage value; by defining a deviation between the zero phase voltage value and a time lag zero phase voltage value delaying by a j times value of the switching period, as a zero phase time lag deviation value; j is a natural number which minimizes a difference between a half period of a mechanical resonance period, and the j times value of switching period; an effective value of the zero phase time lag deviation value becomes small, compared with an effective value of AC component of the zero phase voltage value.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: October 29, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Mori, Akira Furukawa, Kenta Kubo
  • Patent number: 12085418
    Abstract: To provide an abnormality detection apparatus for resolver which can determine the abnormality of at least the first system, even if the period of the excitation AC voltage of the first system and the period of the excitation AC voltage of the second system are different periods, and the magnetic interference between systems occurs. An abnormality detection apparatus for resolver applies an AC voltage of a first period to a first system excitation winding; applies an AC voltage of a second period different from the first period to a second system excitation winding; calculates DC values of first system two output signals by performing a DC extraction processing; and determines abnormality of first system based on whether or not the DC values of first system two output signals are within a normal range.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: September 10, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Mori, Hiroko Ikeda, Toshihiro Matsunaga, Kenji Ikeda, Kenta Kubo
  • Publication number: 20240290969
    Abstract: Provided is a method of producing a sulfur-based active material, the method comprising the steps of: (1) mixing an acrylic resin, sulfur, and an iron compound comprising a divalent or trivalent iron ion to obtain a raw material; and (2) baking the raw material, characterized in that a volume energy density is improved while maintaining a capacity retention rate of the active material that constitutes an electrode of a lithium-ion secondary battery.
    Type: Application
    Filed: March 31, 2022
    Publication date: August 29, 2024
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Fumiya CHUJO, Tatsuya KUBO
  • Patent number: 12068702
    Abstract: In an electric motor control device which controls rotation of an AC electric motor having two sets of three-phase windings and provided with a resolver having two systems by calculating voltage command values on dq axes, dq conversion of currents of first three-phase windings is performed using a first angle calculated from output of the first system of the resolver, and dq conversion of currents of second three-phase windings is performed using a second angle calculated from output of the second system of the resolver. With both d-axis current command values set at the same value, respective voltage command values on dq axes are calculated and respectively converted into voltage command values for voltage application to the first three-phase windings, using the first angle, and converted into voltage command values for voltage application to the second three-phase windings, using the second angle.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: August 20, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiko Orii, Tatsuya Mori, Hiroko Ikeda, Toshihiro Matsunaga, Kenji Ikeda, Kenta Kubo
  • Publication number: 20240272566
    Abstract: A toner container is attachable to and detachable from a body of an image forming apparatus and includes a substantially cylindrical container body and a substantially cylindrical cap. The container body conveys toner stored inside the container body. The cap has a through hole through which a toner conveying nozzle disposed in the body of the image forming apparatus is to be inserted into the container body. The through hole is in a central portion of the cap. The cap has a fitted portion to be fitted with a fitting portion disposed in the body of the image forming apparatus to position the cap non-rotatably to the body of the image forming apparatus. The fitted portion is disposed in each of an upper portion and a lower portion of the cap when the cap is attached to the body of the image forming apparatus.
    Type: Application
    Filed: January 24, 2024
    Publication date: August 15, 2024
    Inventors: Kentaro NODERA, Tatsuya KUBO, Hideo YOSHIZAWA
  • Patent number: 12058835
    Abstract: An information processing apparatus comprises a first heat generation circuit, a second heat generation circuit, a blocking assembly, and a processor. The blocking assembly performs a first operation of blocking air flowing from the first heat generation circuit toward the second heat generation circuit or a second operation of passing the air, and the processor is configure to instruct the blocking assembly to perform the first operation in a case where a temperature of the air is higher than a predetermined value, and instruct the blocking assembly to perform the second operation in a case where the temperature of the air is lower than the predetermined value.
    Type: Grant
    Filed: April 27, 2022
    Date of Patent: August 6, 2024
    Assignee: FUJITSU LIMITED
    Inventors: Kiichi Koyama, Tatsuya Sudo, Kazuo Tanaka, Hirotaka Shikada, Hiroshi Nagaoka, Hirofumi Konno, Takatoshi Katou, Nobuyoshi Aida, Masafumi Asano, Kazuo Kubo
  • Publication number: 20240260266
    Abstract: A memory device includes an alternating stack of insulating layers and electrically conductive layers, such that a first electrically conductive layer of the electrically conductive layers is in contact with an underlying silicon oxycarbide liner and with an overlying silicon oxycarbide liner, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and including a vertical semiconductor channel and a memory film containing a continuous memory material layer which continuously extends through the entire alternating stack.
    Type: Application
    Filed: July 21, 2023
    Publication date: August 1, 2024
    Inventors: Naohiro HOSODA, Masanori TSUTSUMI, Shunsuke TAKUMA, Seiji SHIMABUKURO, Tatsuya HINOUE, Takashi KASHIMURA, Tomohiro KUBO, Hisakazu OTOI, Hiroyuki TANAKA, Takumi MORIYAMA, Ryota SUZUKI
  • Publication number: 20240198534
    Abstract: A robot inspection system includes a coupling unit to which a mount table with a robot mounted thereon is coupled, a positioning mechanism positioning the coupling unit and the mount table, and an inspection unit performing an inspection of the robot with the mount table coupled to the coupling unit. Further, the mount table is transported to the coupling unit by an automatic guided vehicle. Furthermore, the inspection unit performs a plurality of types of inspections on the robot. Moreover, the coupling unit includes a recessed portion having an entry opening entered by the mount table, and the inspection unit is placed around the recessed portion.
    Type: Application
    Filed: December 14, 2023
    Publication date: June 20, 2024
    Inventors: Shota URUMA, Tatsuya Kubo, Hiroyuki Shindo
  • Publication number: 20240140642
    Abstract: A packing member, a toner container, and a packing method. The packing member contains the toner container, and the packing member includes a box containing the toner container with a gap between one side of the box and a container body and between the one side of the box and a large-dimension portion of the toner container, a first pressing portion that presses the container body, and a second pressing portion that presses the large-dimension portion. In the packing member, the large-dimension portion of the toner container is disposed at one end of the container body, and the large-dimension portion has a wider dimension than the container body in a direction orthogonal to a longitudinal direction of the toner container. In the packing member, the container body contacts, with first contact force, a first bearer inside the box to maintain the gap.
    Type: Application
    Filed: October 26, 2023
    Publication date: May 2, 2024
    Inventors: Shuntaroh TAMAKI, Seiji TERAZAWA, Yosio SANO, Teruo SHIBATA, Tatsuya KUBO
  • Patent number: 11953843
    Abstract: A powder container includes a powder chamber for containing powder for forming images, a powder outlet formed in a face of the powder container, and a shutter assembly to open and close the powder outlet and including first and second shutters. The first shutter is movable between a sealing position to close the powder outlet and an open position to open the powder outlet and includes a pressed member to cancel retention of the first shutter at the sealing position. The second shutter includes a pressing projection that interferes with the pressed member of the first shutter and is movable between a shielding position to cover the pressed member without interference between the pressing projection and the pressed member and a releasing position to press the pressed member with the pressing projection.
    Type: Grant
    Filed: July 13, 2022
    Date of Patent: April 9, 2024
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kentaro Nodera, Emi Kita, Akihiro Takayama, Susumu Tateyama, Shinnosuke Koshizuka, Tatsuya Kubo, Teppei Kikuchi
  • Patent number: 11880160
    Abstract: A filter holding device includes an opening portion and a filter. The opening portion communicates an inside of the filter holding device with an outside of the filter holding device. The filter includes a first side and a second side. The first side faces the inside of the filter holding device. The second side faces the outside of the filter holding device. The filter has a lower weight density per unit volume at the first side than at the second side. At least a side face of the first side of the filter is covered with an air-impermeable member. The side face is a lateral face of the filter at the first side.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: January 23, 2024
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hotaru Hashikawa, Tatsuya Kubo, Kazuki Yogosawa, Yuta Yabuta, Takuya Suganuma
  • Patent number: 11876228
    Abstract: Provided is an organic sulfur material comprising a sulfur-modified acrylic resin, wherein an acrylic resin is at least one polymer selected from the group consisting of (a) a polymer of at least one selected from the group consisting of acrylate compounds represented by CH2?C(R11)COOR12, wherein R11 is a hydrogen atom or a methyl group and R12 is an alkyl group, and (b) a polymer of at least one selected from the group consisting of acrylate compounds above and at least one selected from the group consisting of diacrylate compounds represented by CH2?C(R21)COO—Y—OCO(R22)C?CH2, wherein each of R21 and R22 is the same or different and is a methyl group, etc., Y is a hydrocarbylene group, etc., wherein the hydrocarbylene group may have a substituent selected from a hydroxyl group and an alkyl group.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: January 16, 2024
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Fumiya Chujo, Tatsuya Kubo
  • Patent number: 11813874
    Abstract: A process cartridge includes an image bearer, a developer bearer, and a positioning member. The image bearer is rotatable. The developer bearer is rotatable and opposite to the image bearer. The positioning member determines an opposing distance between the image bearer and the developer bearer, and includes a fitting portion and a groove. A fitted portion of the image bearer rotatably fits to the fitting portion. The groove extends from a ceiling portion to a bottom portion. A shaft portion of the developer bearer is slidingly movable in the groove. The groove is formed such that the shaft portion of the developer bearer contacts the bottom portion and is supported by the bottom portion. The ceiling portion of the groove is open upward so that the shaft portion of the developer bearer is insertable to and removable from the groove.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: November 14, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tatsuya Kubo, Shinya Karasawa, Kazuki Yogosawa, Yuuki Tsuchiya
  • Publication number: 20230330582
    Abstract: A filter holding device includes an opening portion and a filter. The opening portion communicates an inside of the filter holding device with an outside of the filter holding device, and has a rim that extends in a communication direction from the inside of the filter holding device toward the outside of the filter holding device. The filter is disposed in the opening portion, and has a first side and a second side. The first side faces the inside of the filter holding device. The second side faces the outside of the filter holding device. The filter has a larger weight density per unit volume at the second side facing the outside of the filter holding device than at the first side facing the inside of the filter holding device in a state in which the filter is disposed in the opening portion.
    Type: Application
    Filed: September 22, 2021
    Publication date: October 19, 2023
    Inventors: Yuta YABUTA, Kazuki YOGOSAWA, Tatsuya KUBO, Takuya SUGANUMA, Hotaru HASHIKAWA, Yoshihiro FUJIWARA
  • Publication number: 20230315006
    Abstract: A positioning member defines a facing distance between a first rotating body and a second rotating body. The positioning member includes a fitting portion, a groove, and a restricting member. A fitted portion of the first rotating body is to be rotatably fitted into the fitting portion. The groove has a groove shape extending in a predetermined direction from an opening to an abutting portion. A shaft portion of the second rotating body is to be slidably movable in the groove. The restricting member restricts movement of the shaft portion in the predetermined direction in a state in which the shaft portion abuts on the abutting portion in the groove. The restricting member is detachably disposed on the groove.
    Type: Application
    Filed: August 17, 2021
    Publication date: October 5, 2023
    Inventors: Kazuki YOGOSAWA, Tatsuya KUBO, Yuuki TSUCHIYA, Shinya KARASAWA
  • Patent number: 11774878
    Abstract: An amount-of-remaining-toner detecting device includes: a toner housing portion in which a toner bottle is housed, the toner bottle having a bottle body that is cylindrical and in which toner is housed, and a cap that is attached to one end of the bottle body in an axial direction of the bottle body and from which the toner housed in the bottle body is discharged; and circuitry configured to detect an amount of remaining toner in the toner bottle housed in the toner housing portion. The toner housing portion includes a first pair of electrodes facing each other with the bottle body interposed between the first pair of electrodes, and a second pair of electrodes facing each other with the bottle body interposed between the second pair of electrodes, at respective positions closer to the cap than the first pair of electrodes are.
    Type: Grant
    Filed: June 10, 2022
    Date of Patent: October 3, 2023
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryotaro Konno, Junichi Matsumoto, Tatsuya Kubo, Yuki Osato, Yuusuke Tomura, Masashi Hommi
  • Patent number: 11604423
    Abstract: A remaining toner amount detection device includes four electrodes and a controller. Each electrode has an arc shape along an outer circumferential surface of a toner bottle, and the four electrodes are spaced a certain distance apart in a circumferential direction so as to surround the toner bottle. The controller detects a remaining toner amount inside the toner bottle by using the four electrodes. The controller determines whether at least one of a first electrostatic capacity value between one pair of adjacent electrodes and a second electrostatic capacity value between the other pair of adjacent electrodes falls within a threshold range. In response to determination that at least one of the electrostatic capacity values falls within the threshold range, the controller detects a remaining toner amount inside the toner bottle based on an electrostatic capacity value, and outputs the detected remaining toner amount.
    Type: Grant
    Filed: February 28, 2022
    Date of Patent: March 14, 2023
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuki Osato, Masashi Hommi, Yuusuke Tomura, Ryotaro Konno, Junichi Matsumoto, Tatsuya Kubo
  • Patent number: 11552298
    Abstract: An object of the present invention is to provide a lithium-ion secondary battery having a large charge and discharge capacity and excellent cycle characteristics irrespective of kind and shape of a current collector. The lithium-ion secondary battery comprises an electrode comprising a primer layer for protecting a current collector and a crosslinking agent layer comprising a compound being capable of crosslinking an aqueous binder contained in the primer layer, the both layers being disposed between a current collector and an active material layer comprising a sulfur-based active material.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: January 10, 2023
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Naoto Yamashita, Takashi Mukai, Masahiro Yanagida, Tatsuya Kubo, Fumiya Chujo
  • Publication number: 20220397853
    Abstract: An amount-of-remaining-toner detecting device includes: a toner housing portion in which a toner bottle is housed, the toner bottle having a bottle body that is cylindrical and in which toner is housed, and a cap that is attached to one end of the bottle body in an axial direction of the bottle body and from which the toner housed in the bottle body is discharged; and circuitry configured to detect an amount of remaining toner in the toner bottle housed in the toner housing portion. The toner housing portion includes a first pair of electrodes facing each other with the bottle body interposed between the first pair of electrodes, and a second pair of electrodes facing each other with the bottle body interposed between the second pair of electrodes, at respective positions closer to the cap than the first pair of electrodes are.
    Type: Application
    Filed: June 10, 2022
    Publication date: December 15, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Ryotaro Konno, Junichi Matsumoto, Tatsuya Kubo, Yuki Osato, Yuusuke Tomura, Masashi Hommi