Patents by Inventor Tsutomu Itou

Tsutomu Itou 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: 20250207661
    Abstract: A power transmission device includes a case that houses a power transmission mechanism, a control valve arranged upright inside the case, and first and second pumps configured to supply oil to the control valve. The case has a first support wall that supports an axis of rotation of the power transmission mechanism, a second support wall that supports the control valve and is arranged aligned with the axis of rotation, a first chamber located on one side of the first support wall, a second chamber adjacent to the first chamber across the second support wall, and a third support wall extending from the second support wall along the axis of rotation to the other side of the first support wall. The first pump is mounted on the first support wall inside the first chamber. The second pump is mounted on the third support wall inside the second chamber.
    Type: Application
    Filed: March 23, 2023
    Publication date: June 26, 2025
    Inventors: Katsunori YAMASHITA, Hirohisa YUKAWA, Masahiro KOUYA, Tomoo IKEDA, Kenji KOJIMA, Akira HIGASHIYAMA, Yasuaki YUMOTO, Tsutomu ITOU, Kazuya NUMATA, Junnosuke KAWAHARA, Kazunori AKIYAMA
  • Publication number: 20250207660
    Abstract: A power transmission device for a vehicle includes a housing that accommodates a power transmission mechanism, and a control valve configured to control a pressure of oil supplied to the power transmission mechanism. The power transmission mechanism includes an input shaft, an intermediate shaft, and an output shaft. The housing defines an insertion hole for a charging pipe. The output shaft is located farther toward a rear of a vehicle than the input shaft. The intermediate shaft is located above the output shaft. The control valve is arranged upright on a vehicle front side of the input shaft. The housing is provided with a recessed portion that is recessed inwardly in a region of the housing below the intermediate shaft and further toward the rear of the vehicle than the output shaft. The insertion hole is provided in a bottom section of the recessed portion when viewed from above.
    Type: Application
    Filed: March 23, 2023
    Publication date: June 26, 2025
    Inventors: Katsunori YAMASHITA, Masayasu KINOSHITA, Yasuaki YUMOTO, Tsutomu ITOU, Satoshi WAKATSUKI, Kazuya NUMATA
  • Patent number: 12331826
    Abstract: A baffle plate including a body portion, a cover portion and a seal member, a final gear and a driven sprocket disposed in an accommodating chamber of the baffle plate, an oil pump serving as a source of oil for lubrication, and an oil pan are provided. At least one of the body portion, the cover portions and the seal members includes a material that shrinks as the temperature of the oil decreases. The baffle plate is dimensioned such that a gap is sealed by the seal member when the temperature of the oil is equal to or higher than a predetermined oil temperature and an aperture is formed when the temperature of the oil is less than the predetermined oil temperature. The gap is the gap between an inner circumference of an outer wall portion of the body portion and each of a base portion of the cover portion and a base portion of the cover portion.
    Type: Grant
    Filed: February 16, 2024
    Date of Patent: June 17, 2025
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventor: Tsutomu Itou
  • Patent number: 12276330
    Abstract: An apparatus includes a case that stores oil inside, wherein the case includes a drain hole that discharges the oil to an outside, and a tubular portion that protrudes in a direction intersecting a direction of gravity, and the drain hole opens in a direction intersecting the direction of gravity on the tubular portion.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: April 15, 2025
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventor: Tsutomu Itou
  • Publication number: 20250067333
    Abstract: A power transmission device includes: a case that accommodates a power transmission mechanism; a strainer disposed to face a bottom wall portion in the case; a suction port for oil provided in a portion of the strainer facing the bottom wall portion; and a magnet disposed between the bottom wall portion and the strainer in the case. The magnet and the suction port are provided to be displaced from each other when viewed from a facing direction in which the strainer and the bottom wall portion face each other, and the suction port is provided with an opening facing a magnet side.
    Type: Application
    Filed: March 23, 2023
    Publication date: February 27, 2025
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Akira TSUCHIDA, Katsunori YAMASHITA, Tomoya OTAKI, Tsutomu ITOU
  • Publication number: 20240183440
    Abstract: A baffle plate including a body portion, a cover portion and a seal member, a final gear and a driven sprocket disposed in an accommodating chamber of the baffle plate, an oil pump serving as a source of oil for lubrication, and an oil pan are provided. At least one of the body portion, the cover portions and the seal members includes a material that shrinks as the temperature of the oil decreases. The baffle plate is dimensioned such that a gap is sealed by the seal member when the temperature of the oil is equal to or higher than a predetermined oil temperature and an aperture is formed when the temperature of the oil is less than the predetermined oil temperature. The gap is the gap between an inner circumference of an outer wall portion of the body portion and each of a base portion of the cover portion and a base portion of the cover portion.
    Type: Application
    Filed: February 16, 2024
    Publication date: June 6, 2024
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventor: Tsutomu ITOU
  • Patent number: 11940043
    Abstract: A baffle plate (4) including a body portion (5), a cover portion (8, 9) and a seal member (88, 98), a final gear (25) and a driven sprocket (DS) disposed in an accommodating chamber (Sa, Sb) of the baffle plate (4), an oil pump (OP) serving as a source of oil (OL) for lubrication, and an oil pan (16) are provided. At least one of the body portion (5), the cover portions (8, 9) and the seal members (88, 98) includes a material that shrinks as the temperature of the oil (OL) decreases. The baffle plate (4) is dimensioned such that a gap (CL1, CL2) is sealed by the seal member (88, 89) when the temperature of the oil (OL) is equal to or higher than a predetermined oil temperature and an aperture (CL?) is formed when the temperature of the oil (OL) is less than the predetermined oil temperature.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: March 26, 2024
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventor: Tsutomu Itou
  • Publication number: 20240026964
    Abstract: An apparatus includes a case that stores oil inside, wherein the case includes a drain hole that discharges the oil to an outside, and a tubular portion that protrudes in a direction intersecting a direction of gravity, and the drain hole opens in a direction intersecting the direction of gravity on the tubular portion.
    Type: Application
    Filed: October 20, 2021
    Publication date: January 25, 2024
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventor: Tsutomu ITOU
  • Patent number: 11732798
    Abstract: A transmission case having a storage area inside for an assembling member, includes a first opening in the storage area; a seating portion provided in the storage area and on which the assembling member inserted from an opening direction of the first opening is to be seated; and a mirror-finished portion allowing an opposite portion of the assembling member facing the seating portion to be visually recognized when the assembling member is being inserted to the first opening from the opening direction.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: August 22, 2023
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu Itou, Aya Nakata
  • Patent number: 11725720
    Abstract: In a transmission case, a pattern exerting a water repellent effect is provided around a connection portion for a connection with an electrical component. A water passage is provided on an upper surface of an outer peripheral surface of the transmission case. A drain portion is provided on a downstream side of the water passage. The drain portion is a through hole provided in the transmission case, the through hole connecting with the water passage.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: August 15, 2023
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu Itou, Aya Nakata
  • Publication number: 20220341491
    Abstract: A transmission case having a storage area inside for an assembling member, includes a first opening opening in the storage area; a seating portion provided in the storage area and on which the assembling member inserted from an opening direction of the first opening is to be seated; and a mirror-finished portion allowing an opposite portion of the assembling member facing the seating portion to be visually recognized when the assembling member is being inserted to the first opening from the opening direction.
    Type: Application
    Filed: October 19, 2020
    Publication date: October 27, 2022
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu ITOU, Aya NAKATA
  • Patent number: 11480243
    Abstract: The continuously variable transmission includes a transmission case having a side cover, a housing, and a case sandwiched between the side cover and the housing, an oil pump disposed in the transmission case, and a pair of gears disposed in the transmission case. An axial rib having a linear shape extending from the side cover toward the housing is formed on an outer wall surface of the case at a position adjacent to the pair of gears. The axial rib is positioned on a straight line extending from the oil pump in the vertical direction and is locally positioned at a position where the meshing reaction force of the pair of gears is suppressed.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: October 25, 2022
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu Itou, Dai Sugiyama, Satoru Naruoka
  • Patent number: 11466770
    Abstract: A side cover of a continuously variable transmission includes a recess portion supporting a bearing and a recess portion supporting a bearing. The recess portions are connected to each other through a lubricant path. An oil path into which a small diameter portion of a pipe-shaped member is inserted and a connection oil path connecting between the oil path and the lubricant path are connected to each other via a boss portion. The side cover includes a circumference wall portion provided with a plurality of bolt holes. The boss portion is disposed at a position between two of the bolt holes adjacent to each other in a circumference direction.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: October 11, 2022
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Toshiyuki Fujii, Tsutomu Itou
  • Publication number: 20220136596
    Abstract: In a transmission case, a pattern exerting a water repellent effect is provided around a connection portion for a connection with an electrical component. A water passage is provided on an upper surface of an outer peripheral surface of the transmission case. A drain portion is provided on a downstream side of the water passage. The drain portion is a through hole provided in the transmission case, the through hole connecting with the water passage.
    Type: Application
    Filed: November 20, 2019
    Publication date: May 5, 2022
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu ITOU, Aya NAKATA
  • Publication number: 20220056992
    Abstract: A case for a power transmission device is configured to be mounted in a vehicle. The case includes an outer peripheral surface including a connection part through which a component accommodated inside of the case is configured to be connected to an electrical part arranged on outside of the case, and a water repellent pattern provided around the connection part on the outer peripheral surface, the water repellent pattern being configured to exhibit a water repellent effect.
    Type: Application
    Filed: August 6, 2021
    Publication date: February 24, 2022
    Inventors: Tsutomu ITOU, Aya NAKATA
  • Publication number: 20210190200
    Abstract: A baffle plate (4) including a body portion (5), a cover portion (8, 9) and a seal member (88, 98), a final gear (25) and a driven sprocket (DS) disposed in an accommodating chamber (Sa, Sb) of the baffle plate (4), an oil pump (OP) serving as a source of oil (OL) for lubrication, and an oil pan (16) are provided. At least one of the body portion (5), the cover portions (8, 9) and the seal members (88, 98) includes a material that shrinks as the temperature of the oil (OL) decreases. The baffle plate (4) is dimensioned such that a gap (CL1, CL2) is sealed by the seal member (88, 89) when the temperature of the oil (OL) is equal to or higher than a predetermined oil temperature and an aperture (CL?) is formed when the temperature of the oil (OL) is less than the predetermined oil temperature.
    Type: Application
    Filed: May 13, 2019
    Publication date: June 24, 2021
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventor: Tsutomu ITOU
  • Publication number: 20200393037
    Abstract: The continuously variable transmission includes a transmission case having a side cover, a housing, and a case sandwiched between the side cover and the housing, an oil pump disposed in the transmission case, and a pair of gears disposed in the transmission case. An axial rib having a linear shape extending from the side cover toward the housing is formed on an outer wall surface of the case at a position adjacent to the pair of gears. The axial rib is positioned on a straight line extending from the oil pump in the vertical direction and is locally positioned at a position where the meshing reaction force of the pair of gears is suppressed.
    Type: Application
    Filed: January 10, 2019
    Publication date: December 17, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu ITOU, Dai SUGIYAMA, Satoru NARUOKA
  • Patent number: 10837541
    Abstract: Provided is a lubricant guiding structure in an automatic transmission in which a baffle plate configured to regulate the movement of a lubricant agitated by a driven sprocket is provided at one side, where an oil pump is located, in the direction of a rotational axis of the driven sprocket. As viewed from the rotational axis direction, a division wall disposed to extend across a chain is provided closer to the chain than a base of the baffle plate. As viewed from the rotational axis direction, the baffle plate is provided with a guide wall extending along a torque transmission-side chain of the chain wound on the driven sprocket. As viewed from the rotational axis-direction, the guide wall includes an inclined portion inclined in the direction coming closer to the chain as the distance to the distal end side decreases.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: November 17, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu Itou, Tou Ou, Shinji Higashide, Yoshiteru Ueno
  • Publication number: 20200332883
    Abstract: A side cover of a continuously variable transmission includes a recess portion supporting a bearing and a recess portion supporting a bearing. The recess portions are connected to each other through a lubricant path. An oil path into which a small diameter portion of a pipe-shaped member is inserted and a connection oil path connecting between the oil path and the lubricant path are connected to each other via a boss portion. The side cover includes a circumference wall portion provided with a plurality of bolt holes. The boss portion is disposed at a position between two of the bolt holes adjacent to each other in a circumference direction.
    Type: Application
    Filed: November 15, 2018
    Publication date: October 22, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Toshiyuki FUJII, Tsutomu ITOU
  • Patent number: RE50323
    Abstract: Provided is a lubricant guiding structure in an automatic transmission in which a baffle plate configured to regulate the movement of a lubricant agitated by a driven sprocket is provided at one side, where an oil pump is located, in the direction of a rotational axis of the driven sprocket. As viewed from the rotational axis direction, a division wall disposed to extend across a chain is provided closer to the chain than a base of the baffle plate. As viewed from the rotational axis direction, the baffle plate is provided with a guide wall extending along a torque transmission-side chain of the chain wound on the driven sprocket. As viewed from the rotational axis-direction, the guide wall includes an inclined portion inclined in the direction coming closer to the chain as the distance to the distal end side decreases.
    Type: Grant
    Filed: November 16, 2022
    Date of Patent: March 4, 2025
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Tsutomu Itou, Tou Ou, Shinji Higashide, Yoshiteru Ueno