Patents by Inventor Tomoyuki HIRAMOTO

Tomoyuki HIRAMOTO 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: 11401995
    Abstract: A torsional vibration damper that a torsional vibration damper having a planetary gear unit, and a manufacturing method of the torsional vibration damper for limiting damages on gears of the planetary gear unit due to dimension errors. In the planetary gear unit, at least one of a sun gear, a ring gear, and a set of planetary gears is/are formed by a press forming method. The gear formed by the press forming method is engaged with the remaining gears in such a manner that a thinner portion of each tooth is individually engaged with a thicker portion of the adjacent teeth of the remaining gears.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: August 2, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN FUKUI Corporation
    Inventors: Masayuki Ishibashi, Hideyuki Nishida, Yoichi Oi, Takuya Yoshikawa, Katsunori Tanaka, Tomoyuki Hiramoto
  • Patent number: 10968977
    Abstract: A torsional vibration damper whose vibration damping performance will not be reduced in a high speed range. In the torsional vibration damper, a planetary gear is oscillated within a first oscillating range when a torsional torque is smaller than a reference torque, and within a second oscillating range when the torsional torque is greater than the reference torque. Each backlash between the pinion gear and at least one of a sun gear and a ring gear within the second oscillating range is individually wider than each backlash between the pinion gear and the sun gear and each backlash between the pinion gear and the ring gear within the first oscillating range.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: April 6, 2021
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD.
    Inventors: Masayuki Ishibashi, Hideyuki Nishida, Isamu Hachisuwa, Yoichi Oi, Takuya Yoshikawa, Ryosuke Otsuka, Katsunori Tanaka, Tomoyuki Hiramoto
  • Publication number: 20200355252
    Abstract: A torsional vibration damper that a torsional vibration damper having a planetary gear unit, and a manufacturing method of the torsional vibration damper for limiting damages on gears of the planetary gear unit due to dimension errors. In the planetary gear unit, at least one of a sun gear, a ring gear, and a set of planetary gears is/are formed by a press forming method. The gear formed by the press forming method is engaged with the remaining gears in such a manner that a thinner portion of each tooth is individually engaged with a thicker portion of the adjacent teeth of the remaining gears.
    Type: Application
    Filed: April 27, 2020
    Publication date: November 12, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD.
    Inventors: Masayuki ISHIBASHI, Hideyuki NISHIDA, Yoichi OI, Takuya YOSHIKAWA, Katsunori TANAKA, Tomoyuki HIRAMOTO
  • Publication number: 20200278008
    Abstract: A torsional vibration damper whose vibration damping performance will not be reduced in a high speed range. In the torsional vibration damper, a planetary gear is oscillated within a first oscillating range when a torsional torque is smaller than a reference torque, and within a second oscillating range when the torsional torque is greater than the reference torque. Each backlash between the pinion gear and at least one of a sun gear and a ring gear within the second oscillating range is individually wider than each backlash between the pinion gear and the sun gear and each backlash between the pinion gear and the ring gear within the first oscillating range.
    Type: Application
    Filed: February 25, 2020
    Publication date: September 3, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD.
    Inventors: Masayuki ISHIBASHI, Hideyuki NISHIDA, lsamu HACHISUWA, Yoichi OI, Takuya YOSHIKAWA, Ryosuke OTSUKA, Katsunori TANAKA, Tomoyuki HIRAMOTO
  • 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: 10711862
    Abstract: A damper device that includes an elastic body support provided to the intermediate element to support both end portions of the third elastic body at least when torque is not transferred between the input and the output; and an elastic body abutment provided to one of the input and the output, the elastic body abutment not abutting against an end portion of the third elastic body at least when torque is not transferred between the input and the output, but abutting against one of the end portions of the third elastic body as a relative torsional angle between the one of the input and the output and the intermediate element is increased when torque is transferred between the input and the output.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: July 14, 2020
    Assignees: AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD
    Inventors: Kazuyoshi Ito, Makoto Nakazuru, Shuhei Warashina, Tanaka Katsunori, Tomoyuki Hiramoto
  • Publication number: 20180266516
    Abstract: A damper device that includes an elastic body support provided to the intermediate element to support both end portions of the third elastic body at least when torque is not transferred between the input and the output; and an elastic body abutment provided to one of the input and the output, the elastic body abutment not abutting against an end portion of the third elastic body at least when torque is not transferred between the input and the output, but abutting against one of the end portions of the third elastic body as a relative torsional angle between the one of the input and the output and the intermediate element is increased when torque is transferred between the input and the output.
    Type: Application
    Filed: September 28, 2016
    Publication date: September 20, 2018
    Applicants: AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD
    Inventors: Kazuyoshi ITO, Makoto NAKAZURU, Shuhei WARASHINA, Tanaka KATSUNORI, Tomoyuki HIRAMOTO