Patents by Inventor Tomo IWAGAKI

Tomo IWAGAKI 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: 11454297
    Abstract: A torsional vibration damper that damps torsional vibration effectively in a low-speed range. In the torsional vibration damper, a spring holder is formed by apertures of an input element and an output element, and an elastic member is held in the spring holder. A first moveable range of a planetary element extending from an initial position in a drive direction is wider than a second movable range of the planetary element extending from the initial position in a counter direction.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: September 27, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN FUKUI CORPORATION
    Inventors: Tomo Iwagaki, Hideyuki Nishida, Masayuki Ishibashi, Yoichi Oi, Yu Mizukami, Takuya Yoshikawa, Katsunori Tanaka, Tomoyuki Hiramoto
  • Patent number: 10781883
    Abstract: A centrifugal pendulum damper for effectively suppressing torsional vibrations resulting from torque pulse. The centrifugal pendulum damper comprises: a rotary member rotated by a torque; an inertial member that rotates relatively to the rotary member; a chamber formed on the inertial member; and a rolling member held partially in the chamber while being allowed to oscillate therein, and held partially by the rotary member while being allowed to move radially. A raceway surface on which the rolling member rolls is formed in the chamber in such a manner that a curvature radius of an orbit of a gravity center of the rolling member oscillating along the raceway surface is increased with an increase in an oscillation angle of the rolling member.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: September 22, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomo Iwagaki, Hiroyuki Amano, Masayuki Ishibashi, Ryoo Yongjoo
  • Publication number: 20200263762
    Abstract: A torsional vibration damper that damps torsional vibration effectively in a low-speed range. In the torsional vibration damper, a spring holder is formed by apertures of an input element and an output element, and an elastic member is held in the spring holder. A first moveable range of a planetary element extending from an initial position in a drive direction is wider than a second movable range of the planetary element extending from the initial position in a counter direction.
    Type: Application
    Filed: February 12, 2020
    Publication date: August 20, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD.
    Inventors: Tomo IWAGAKI, Hideyuki Nishida, Masayuki Ishibashi, Yoichi Ol, Yu Mizukami, Takuya Yoshikawa, Katsunori Tanaka, Tomoyuki Hiramoto
  • Patent number: 10550912
    Abstract: A torsional vibration damper includes a rotary member rotated by torque, an inertia body rotated relatively on an outer radial side of the rotary member due to torque pulse, and a rolling member coupled to the rotary member and the inertia body. The rotary member includes support sections that are provided on its outer radial side, and by which the rolling member is restricted in a rotating direction of the rotary member and is engaged movably in a radial direction of the rotary member. The inertia body includes: a pair of mass sections respectively projecting toward both sides in an axial direction; and a pair of raceway surfaces on which the rolling member rolls. A center of curvature of each raceway surface is deviated from a rotational center of the rotary member.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: February 4, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masayuki Ishibashi, Hiroyuki Amano, Tomo Iwagaki
  • Publication number: 20190170212
    Abstract: A torsional vibration damper having an improved attenuation performance of low frequency vibration. The torsional vibration damper comprises a rotary member rotated by torque, an inertia body rotated relatively on an outer radial side of the rotary member due to torque pulse, and a rolling member coupled to the rotary member and the inertia body. The rotary member includes support sections that are provided on its outer radial side, and by which the rolling member is restricted in a rotating direction of the rotary member and is engaged movably in a radial direction of the rotary member. The inertia body includes: a pair of mass sections respectively projecting toward both sides in an axial direction; and a pair of raceway surfaces on which the rolling member rolls. A center of curvature of each raceway surface is deviated from a rotational center of the rotary member.
    Type: Application
    Filed: December 3, 2018
    Publication date: June 6, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masayuki ISHIBASHI, Hiroyuki AMANO, Tomo IWAGAKI
  • Publication number: 20190048972
    Abstract: A centrifugal pendulum damper for effectively suppressing torsional vibrations resulting from torque pulse. The centrifugal pendulum damper comprises: a rotary member rotated by a torque; an inertial member that rotates relatively to the rotary member; a chamber formed on the inertial member; and a rolling member held partially in the chamber while being allowed to oscillate therein, and held partially by the rotary member while being allowed to move radially. A raceway surface on which the rolling member rolls is formed in the chamber in such a manner that a curvature radius of an orbit of a gravity center of the rolling member oscillating along the raceway surface is increased with an increase in an oscillation angle of the rolling member.
    Type: Application
    Filed: August 7, 2018
    Publication date: February 14, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomo IWAGAKI, Hiroyuki AMANO, Masayuki ISHIBASHI, Ryoo YONGJOO