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).

  • Publication number: 20250047960
    Abstract: A variable focal length lens device includes: a variable focal length optical system configured to change a focal length; a beam splitter configured to cause passing light, which is reflected off an object and passes through the variable focal length optical system, to branch into branched beams; an image-forming lens configured to condense the branched beams respectively; an image sensor configured to capture an image of the object by receiving the branched beam condensed by the image-forming lens; and an image sensor configured to capture an image of the object by receiving the branched beam condensed by the image-forming lens. An imaging distance on a first optical axis from the image sensor to the image-forming lens and an imaging distance on a second optical axis from the image sensor to the image-forming lens are different from each other.
    Type: Application
    Filed: July 31, 2024
    Publication date: February 6, 2025
    Applicant: MITUTOYO CORPORATION
    Inventors: Yuko SHISHIDO, Koji KUBO, Tatsuya NAGAHAMA
  • Patent number: 12212258
    Abstract: To provide a controller for rotary electric machine and an electric power steering apparatus which can increases decreases an increase amount of the current of d-axis in the negative direction appropriately, and can perform the weakening magnetic flux appropriately, irrespective of increase and decrease in the rotational angle speed, without using the information on the inductance and the interlinkage flux of the rotor. A controller for rotary electric machine, in a case where the current command value of q-axis is a positive value, changes the current command value of d-axis, based on a deviation between an offset q-axis current command value obtained by subtracting the q-axis offset value of the positive value from the current command value of q-axis, and the current detection value of q-axis.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: January 28, 2025
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jun Kitagawa, Tatsuya Mori, Masahiko Orii, Kenta Kubo, Kenta Sawada
  • Patent number: 12206107
    Abstract: Provided is a sulfur-based active material for a non-aqueous electrolyte secondary battery having a large charge/discharge capacity and excellent cycle characteristics which is inexpensively and easily provided, an electrode comprising the sulfur-based active material, and a non-aqueous electrolyte secondary battery comprising the electrode, as well as a producing method thereof. The sulfur-based active material is obtainable by calcinating a raw material, the raw material comprising (1) a heat-expandable particle comprising an outer shell comprising an acryl-based copolymer and a hydrocarbon included inside the outer shell, the heat-expandable particle having an expansion starting temperature of 150° C. or lower, and (2) sulfur.
    Type: Grant
    Filed: April 26, 2021
    Date of Patent: January 21, 2025
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tatsuya Kubo, Fumiya Chujo
  • Patent number: 12189331
    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: Grant
    Filed: August 17, 2021
    Date of Patent: January 7, 2025
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kazuki Yogosawa, Tatsuya Kubo, Yuuki Tsuchiya, Shinya Karasawa
  • 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
  • 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
  • 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
  • Publication number: 20220395771
    Abstract: A filter holding device includes an opening portion and a filter. The opening portion communicates between an inside and an outside of the filter holding device. The filter is disposed in the opening portion and includes a first side and a second side. The first side is located adjacent to the inside of the filter holding device. The second side is located adjacent to the outside of the filter holding device. The filter has a larger weight density per unit volume at the second side than a weight density per unit volume at the first side and has a larger area of a surface intersecting a communication direction at the second side than an area of a surface intersecting the communication direction at the first side.
    Type: Application
    Filed: June 2, 2022
    Publication date: December 15, 2022
    Inventors: Shohtaroh HOSHI, Kazuki YOGOSAWA, Tatsuya KUBO, Yuta YABUTA, Hotaru HASHIKAWA, Takuya SUGANUMA, Takuya SEKINE, Tatsumi YAMADA
  • Patent number: D1062861
    Type: Grant
    Filed: February 1, 2023
    Date of Patent: February 18, 2025
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shuntaro Tamaki, Seiji Terazawa, Gen Kitamura, Hideo Yoshizawa, Tatsuya Kubo