Patents by Inventor Hirokazu Kouno

Hirokazu Kouno 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).

  • Automatic transmission power transmission device
    Patent number: 11149847
    Abstract: A power transmission device in an automatic transmission includes a friction tightening element (a second brake) having a drum member, and a transmission path constituent member (a third ring gear) coupled to the drum member via a coupling part extending circumferentially along the drum member, the drum member having low-rigidity parts (long holes) provided at a plurality of circumferential positions on the drum member in at least one of portions radially outside and inside the coupling part.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: October 19, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Masanori Sasaki, Masamichi Fujikawa, Kazuhiro Yamada, Kensuke Ueda, Sayaka Katayama, Yasuo Miura, Takeyuki Tanaka, Hirokazu Kouno, Takashi Miyamoto, Ryohei Hanamure, Siyuan Tao
  • AUTOMATIC TRANSMISSION POWER TRANSMISSION DEVICE
    Publication number: 20210048103
    Abstract: A power transmission device in an automatic transmission includes a friction tightening element (a second brake) having a drum member, and a transmission path constituent member (a third ring gear) coupled to the drum member via a coupling part extending circumferentially along the drum member, the drum member having low-rigidity parts (long holes) provided at a plurality of circumferential positions on the drum member in at least one of portions radially outside and inside the coupling part.
    Type: Application
    Filed: November 13, 2018
    Publication date: February 18, 2021
    Inventors: Masanori SASAKI, Masamichi FUJIKAWA, Kazuhiro YAMADA, Kensuke UEDA, Sayaka KATAYAMA, Yasuo MIURA, Takeyuki TANAKA, Hirokazu KOUNO, Takashi MIYAMOTO, Ryohei HANAMURE, Siyuan TAO
  • Friction engagement device of automatic transmission
    Patent number: 10655694
    Abstract: A friction engagement device of an automatic transmission is provided, which includes a rotational member comprised of at least one of a drum member and a hub member including a spline part engaged with a friction plate to be movable in axial directions of the automatic transmission, and a drive force transmitting part for exchanging a drive force with another rotational element. The drive force transmitting part of the rotational member is made of a ferrous metal. A part of the rotational member other than the drive force transmitting part is made of a clad material containing a first material that is easily joined to the ferrous metal and a second material that is less easily joined to the ferrous metal compared to the first material and weighs less than the ferrous metal.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: May 19, 2020
    Assignee: Mazda Motor Corporation
    Inventors: Shinya Okumura, Kazuyuki Shiino, Hirokazu Kouno, Masanori Sasaki, Masamichi Fujikawa, Yasuo Miura, Masashi Morihiro, Takeyuki Tanaka, Yuya Takemura
  • FRICTION ENGAGEMENT DEVICE OF AUTOMATIC TRANSMISSION
    Publication number: 20180306258
    Abstract: A friction engagement device of an automatic transmission is provided, which includes a rotational member comprised of at least one of a drum member and a hub member including a spline part engaged with a friction plate to be movable in axial directions of the automatic transmission, and a drive force transmitting part for exchanging a drive force with another rotational element. The drive force transmitting part of the rotational member is made of a ferrous metal. A part of the rotational member other than the drive force transmitting part is made of a clad material containing a first material that is easily joined to the ferrous metal and a second material that is less easily joined to the ferrous metal compared to the first material and weighs less than the ferrous metal.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 25, 2018
    Inventors: Shinya Okumura, Kazuyuki Shiino, Hirokazu Kouno, Masanori Sasaki, Masamichi Fujikawa, Yasuo Miura, Masashi Morihiro, Takeyuki Tanaka, Yuya Takemura