Patents by Inventor Kohei IZUMI

Kohei IZUMI 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).

  • Planetary gear type transmission
    Patent number: 9726259
    Abstract: A first carrier rotates integrally with an input shaft. A third sun gear and a fourth sun gear rotate integrally with a first intermediate shaft. A third carrier rotates integrally with a second ring gear. A fourth carrier rotates integrally with a third ring gear, and outputs power. A first clutch couples a first ring gear and a second sun gear to the first intermediate shaft. A second clutch couples the first carrier to a second carrier. A third clutch couples the second carrier to the first intermediate shaft. A first brake brakes rotation of a first sun gear. A second brake brakes rotation of the second ring gear and the third carrier. A third brake brakes rotation of a fourth ring gear.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: August 8, 2017
    Assignee: KOMATSU LTD.
    Inventors: Nobuhito Yasuta, Taku Matsuo, Masaki Shiohara, Yutaka Kamatani, Kohei Izumi
  • PLANETARY GEAR TYPE TRANSMISSION
    Publication number: 20170219053
    Abstract: A first carrier rotates integrally with an input shaft. A third sun gear and a fourth sun gear rotate integrally with a first intermediate shaft. A third carrier rotates integrally with a second ring gear. A fourth carrier rotates integrally with a third ring gear, and outputs power. A first clutch couples a first ring gear and a second sun gear to the first intermediate shaft. A second clutch couples the first carrier to a second carrier. A third clutch couples the second carrier to the first intermediate shaft. A first brake brakes rotation of a first sun gear. A second brake brakes rotation of the second ring gear and the third carrier. A third brake brakes rotation of a fourth ring gear.
    Type: Application
    Filed: February 1, 2016
    Publication date: August 3, 2017
    Inventors: Nobuhito YASUTA, Taku MATSUO, Masaki SHIOHARA, Yutaka KAMATANI, Kohei IZUMI