Patents by Inventor Kyohei SASANUMA

Kyohei SASANUMA 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: 12202388
    Abstract: A clutch unit includes an operation lever, an operation bracket, an output shaft member, an input-side clutch, an output-side clutch, and a housing. An input-side outer ring member of the input-side clutch is a member including a bottom part and an outer ring part. A part of the outer ring part is a thick part. The thickness of the thick part in the radial direction is larger than the thickness of a non-thick part in the radial direction.
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: January 21, 2025
    Assignee: NTN CORPORATION
    Inventors: Kunihiro Mikasa, Yu Kitada, Kyohei Sasanuma, Shaoluan Bian
  • Patent number: 12097787
    Abstract: A clutch unit includes an operation lever, an operation member, an input-side clutch, an output-side clutch, and a bottomed cylindrical housing. The input-side clutch includes an input-side inner ring member and an operation bracket. The operation bracket includes an engagement portion that engages with the input-side inner ring member, a facing portion that faces the bottom surface of the housing with a gap therebetween, a fastened portion that penetrates a through hole formed in the bottom surface of the housing and is fastened to the operation member, and a sliding-contact portion that extends from the facing portion toward the bottom surface of the housing and comes into sliding-contact with the bottom surface of the housing.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: September 24, 2024
    Assignees: Toyota Boshoku Kabushiki Kaisha, NTN CORPORATION
    Inventors: Kunihiro Mikasa, Yasumasa Hibi, Kyohei Sasanuma, Kengo Watanabe
  • Patent number: 12078220
    Abstract: Provided is a clutch unit in which an output-side outer ring member is attached to a base plate without welding. A clutch unit (100) includes an output-side clutch (60) and a housing (11) that accommodates the output-side clutch (60). The output-side clutch (60) includes an output-side outer ring member (62). The output-side outer ring member (62) and the housing (11) have an engagement protrusion (62s) and an engagement groove (11s) that engage with each other to restrict relative rotation therebetween.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: September 3, 2024
    Assignees: TOYOTA BOSHOKU KABUSHIKI KAISHA, NTN CORPORATION
    Inventors: Kunihiro Mikasa, Yasumasa Hibi, Kyohei Sasanuma, Shaoluan Bian
  • Publication number: 20240116405
    Abstract: A clutch unit (100) includes an operation lever (21), an operation member (22), an input-side clutch (50), an output-side clutch (60), and a bottomed cylindrical housing (11). The input-side clutch (50) includes an input-side inner ring member (51) and an operation bracket (54). The operation bracket (54) includes an engagement portion (54b) that engages with the input-side inner ring member (51), a facing portion (54d) that faces the bottom surface (11 a) of the housing (11) with a gap therebetween, a fastened portion (54c) that penetrates a through hole (11h) formed in the bottom surface (11a) of the housing (11) and is fastened to the operation member (22), and a sliding-contact portion (54e) that extends from the facing portion (54d) toward the bottom surface (11a) of the housing (11) and comes into sliding-contact with the bottom surface of the housing (11).
    Type: Application
    Filed: January 26, 2022
    Publication date: April 11, 2024
    Applicants: SHIROKI CORPORATION, NTN CORPORATION
    Inventors: Kunihiro MIKASA, Yasumasa HIBI, Kyohei SASANUMA, Kengo WATANABE
  • Publication number: 20240102519
    Abstract: Provided is a clutch unit (1) including: a static system (housing (40)); an output shaft (30); a first clutch part (10); and a second clutch part (20). The first clutch part (10) includes: an input rotary body including an inner ring (13); an output rotary body including an outer ring (14); and a plurality of cylindrical rollers (15) disposed therebetween. The clutch unit (1) includes: a rotation suppressing member (70) configured to apply rotational resistance to the output rotary body of the first clutch part (10); and rotation stopping mechanisms (80) (recessed portions (71) of the rotation suppressing member (70) and extending portions (41) of the housing (40)) configured to restrict rotation of the rotation suppressing member (70) with respect to the housing (40).
    Type: Application
    Filed: December 10, 2021
    Publication date: March 28, 2024
    Inventors: Kyohei SASANUMA, Kunihiro MIKASA
  • Publication number: 20230313850
    Abstract: Provided is a clutch unit in which an output-side outer ring member is attached to a base plate without welding. A clutch unit (100) includes an output-side clutch (60) and a housing (11) that accommodates the output-side clutch (60). The output-side clutch (60) includes an output-side outer ring member (62). The output-side outer ring member (62) and the housing (11) have an engagement protrusion (62s) and an engagement groove (11s) that engage with each other to restrict relative rotation therebetween.
    Type: Application
    Filed: January 26, 2022
    Publication date: October 5, 2023
    Applicants: SHIROKI CORPORATION, NTN CORPORATION
    Inventors: Kunihiro MIKASA, Yasumasa HIBI, Kyohei SASANUMA, Shaoluan BIAN
  • Patent number: 11708012
    Abstract: A clutch unit used for a vehicle seat includes an input side clutch configured such that one member of an input side inner ring member and an input side outer ring member rotates with a rotation of an operation lever, and the other member is rotated via an input side transmission member, so that a rotation of the operation lever is transmitted to an output side clutch. A rotation suppressing member configured to apply a rotational resistance force greater than a force for the co-rotating is provided between the other member and a member that does not rotate during a return operation of the operation lever, so as to suppress co-rotation of the other member by the one member during the return operation to the neutral position.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: July 25, 2023
    Assignees: SHIROKI CORPORATION, NTN CORPORATION
    Inventors: Kunihiro Mikasa, Kyohei Sasanuma
  • Publication number: 20230166642
    Abstract: A clutch unit includes an operation lever, an operation bracket, an output shaft member, an input-side clutch, an output-side clutch, and a housing. An input-side outer ring member of the input-side clutch is a member including a bottom part and an outer ring part. A part of the outer ring part is a thick part. The thickness of the thick part in the radial direction is larger than the thickness of a non-thick part in the radial direction.
    Type: Application
    Filed: May 6, 2021
    Publication date: June 1, 2023
    Inventors: Kunihiro MIKASA, Yu KITADA, Kyohei SASANUMA, Shaoluan BIAN
  • Patent number: 11434962
    Abstract: A clutch unit includes a lever-side clutch section configured to control transmission and interruption of rotational torque input by a rotation of an operation lever, and a brake-side clutch section configured to transmit the rotational torque from the lever-side clutch section to an output side and interrupt rotational torque that is reversely input from the output side. The lever-side clutch section includes a side plate to which the operation lever is fixed and an outer ring member that fits with the side plate. The brake-side clutch section includes a cover whose rotation is restricted. An angle regulating part configured to regulate a rotation angle of the operation lever is disposed radially inside of outer peripheral edges of the outer ring member and the cover and includes a claw of the outer ring member and a through hole of the cover.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: September 6, 2022
    Assignee: NTN Corporation
    Inventor: Kyohei Sasanuma
  • Publication number: 20210404520
    Abstract: A clutch unit includes a lever-side clutch section configured to control transmission and interruption of rotational torque input by a rotation of an operation lever, and a brake-side clutch section configured to transmit the rotational torque from the lever-side clutch section to an output side and interrupt rotational torque that is reversely input from the output side. The lever-side clutch section includes a side plate to which the operation lever is fixed and an outer ring member that fits with the side plate. The brake-side clutch section includes a cover whose rotation is restricted. An angle regulating part configured to regulate a rotation angle of the operation lever is disposed radially inside of outer peripheral edges of the outer ring member and the cover and includes a claw of the outer ring member and a through hole of the cover.
    Type: Application
    Filed: October 25, 2019
    Publication date: December 30, 2021
    Inventor: Kyohei SASANUMA
  • Patent number: 11149802
    Abstract: A clutch unit used for a vehicle seat includes an input side clutch is configured such that one member of the input side inner ring member and the input side outer ring member rotates with a rotation of the operation lever, and the other member of the input side inner ring member and the input side outer ring member is rotated via the input side transmission member, so that the rotation of the operation lever is transmitted to the output side clutch. A rotation suppressing member configured to urge the other member in the rotation axis direction and apply a rotational resistance force greater than a force for the co-rotating is provided so as to suppress co-rotation of the other member. A pressing force transmission portion configured to transmit a force the rotation suppressing member urges in the rotation axis direction to the output side transmission member is provided.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: October 19, 2021
    Assignees: SHIROKI CORPORATION, NTN CORPORATION
    Inventors: Kunihiro Mikasa, Kyohei Sasanuma
  • Publication number: 20210221261
    Abstract: A clutch unit used for a vehicle seat includes an input side clutch configured such that one member of an input side inner ring member and an input side outer ring member rotates with a rotation of an operation lever, and the other member is rotated via an input side transmission member, so that a rotation of the operation lever is transmitted to an output side clutch. A rotation suppressing member configured to apply a rotational resistance force greater than a force for the co-rotating is provided between the other member and a member that does not rotate during a return operation of the operation lever, so as to suppress co-rotation of the other member by the one member during the return operation to the neutral position.
    Type: Application
    Filed: May 29, 2019
    Publication date: July 22, 2021
    Inventors: Kunihiro MIKASA, Kyohei SASANUMA
  • Publication number: 20210207665
    Abstract: A clutch unit used for a vehicle seat includes an input side clutch is configured such that one member of the input side inner ring member and the input side outer ring member rotates with a rotation of the operation lever, and the other member of the input side inner ring member and the input side outer ring member is rotated via the input side transmission member, so that the rotation of the operation lever is transmitted to the output side clutch. A rotation suppressing member configured to urge the other member in the rotation axis direction and apply a rotational resistance force greater than a force for the co-rotating is provided so as to suppress co-rotation of the other member. A pressing force transmission portion configured to transmit a force the rotation suppressing member urges in the rotation axis direction to the output side transmission member is provided.
    Type: Application
    Filed: May 29, 2019
    Publication date: July 8, 2021
    Inventors: Kunihiro MIKASA, Kyohei SASANUMA
  • Patent number: 10794483
    Abstract: A spool valve includes a spool in a spool insertion hole defined in a valve body. The spool is configured to be moved by an electric motor via a ball-screw to a first position where an input port is in communication with an output port, while the output port is not in communication with a drain port, and to a second position where the input port is not in communication with the output port, while the output port is in communication with the drain port.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: October 6, 2020
    Assignee: NTN CORPORATION
    Inventors: Kyohei Sasanuma, Takayuki Norimatsu, Naoshi Hattori, Takahide Saito, Hiroshi Kawamura
  • Patent number: 10408281
    Abstract: A rotation transmission device is provided in which a collision sound by an armature and a rotor is less likely to occur, and further the armature is stably attracted to the rotor. A buffer is provided between the armature and the rotor. The buffer is constituted by a metal annulus axially movably supported by the armature, and a rubber annulus configured such that as the armature approaches the rotor, the rubber annulus is axially compressed by the metal annulus and the armature. The rubber annulus has different axial thicknesses at different circumferential locations thereof such that when the degree of axial compression of the rubber annulus is large, the rubber annulus is axially compressed in its longer circumferential area than when the degree of axial compression of the rubber annulus is small.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: September 10, 2019
    Assignee: NTN CORPORATION
    Inventors: Marina Fukunari, Takahide Saito, Koji Sato, Makoto Tokuda, Kyohei Sasanuma, Motohiro Tada, Naotsugu Kitayama
  • Patent number: 10302156
    Abstract: A rotation transmission device is provided in which leakage of magnetism from an armature to a control retainer is reduced, and of which a two-way clutch can be operated accurately and reliably. This device includes a restricting arrangement for restricting the fitting amount between a coupling tube of the armature and a tubular portion of the control retainer such that a gap is defined between a back surface of the armature, with respect to its surface to be attracted to a rotor, and an end surface of the tubular portion, to prevent leakage of magnetism from the back surface of the armature to the end surface of the tubular portion when an electromagnet is energized and the armature is pulled to the rotor.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: May 28, 2019
    Assignee: NTN CORPORATION
    Inventors: Naotsugu Kitayama, Kyohei Sasanuma, Marina Fukunari, Takahide Saito, Koji Sato, Masahiro Kawai
  • Patent number: 10151357
    Abstract: A rotation transmission device is configured such that when an electromagnet of an electromagnetic clutch is energized, an armature is attracted toward a rotor, so that a control retainer defining a two-way clutch is moved in an axial direction, whereby the control retainer and a rotary retainer are rotated relative to each other in a direction in which circumferential widths of pockets decrease, thereby disengaging pairs of rollers from an inner periphery of an outer ring and an outer periphery of an inner ring. The rotation transmission device includes a shock absorbing member on a surface of the armature facing the rotor, the shock absorbing member being configured to absorb impact force when the armature is attracted to the rotor by being elastically deformed.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: December 11, 2018
    Assignee: NTN CORPORATION
    Inventors: Naotsugu Kitayama, Marina Fukunari, Kyohei Sasanuma, Koji Akiyoshi, Masahiro Kawai, Takahide Saito, Koji Sato
  • Patent number: 10138954
    Abstract: A rotation transmission device includes an inner ring provided on an input shaft, an outer ring provided on an output shaft, rollers mounted between the inner periphery of the outer ring and the outer periphery of the inner ring, an electromagnet as a driving source for moving a roller retainer mounted at the end portion of the housing on the side of the input shaft, a first bearing mounted between the electromagnet and the input shaft, a second bearing mounted between the end portion of the housing on a side of the output shaft and the output shaft, and a third bearing mounted between the inner ring and the outer ring. The rotation transmission device further includes a fourth bearing configured to prevent inclination of the axes of the input shaft and the output shaft relative to each other.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: November 27, 2018
    Assignee: NTN CORPORATION
    Inventors: Naotsugu Kitayama, Kyohei Sasanuma, Shintaro Ishikawa, Takahide Saito
  • Publication number: 20170211699
    Abstract: A spool valve is provided which improves the responsiveness of the object to be hydraulically controlled, such as a V-belt type continuously variable transmission, and which improves the overall safety. The spool valve includes a spool inserted in a spool insertion hole formed in a valve body, The spool is moved by an electric motor via a ball-screw to a first position where the input port communicates with the output port, while the output port is not in communication with the drain port, and to a second position where the input port is not in communication with the output port, while the output port communicates with the drain port.
    Type: Application
    Filed: July 17, 2015
    Publication date: July 27, 2017
    Applicant: NTN CORPORATION
    Inventors: Kyohei SASANUMA, Takayuki NORIMATSU, Naoshi HATTORI, Takahide SAITO, Hiroshi KAWAMURA
  • Patent number: D836370
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: December 25, 2018
    Assignee: NTN CORPORATION
    Inventors: Kyohei Sasanuma, Yumiko Mineno