Patents by Inventor Takuya Tomimatu

Takuya Tomimatu 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).

  • Differential gears with a mechanism for controlling differential motion
    Patent number: 9062750
    Abstract: A differential device has a clutch which is provided between at least one side gear and a differential case to limit relative rotation of the side gear and the differential case. The clutch includes one or more inner pawl discs and outer pawl discs alternately arranged in an axial direction of the side gear between an inner peripheral surface of the differential case and an outer peripheral surface of the side gear. The side gear includes a gear-side fit part extending in the axial direction to which the inner pawl disc is concave-convex fitted. The differential case includes a case-side fit parts extending in the axial direction to which the outer pawl clutch is concave-convex fitted. At least one of the gear-side fit part and the case-side fit part is formed in a spiral shape angled with respect to the axial direction.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: June 23, 2015
    Assignee: OS GIKEN CO., LTD.
    Inventor: Takuya Tomimatu
  • DIFFERENTIAL DEVICE WITH LIMITED-SLIP DIFFERENTIAL MECHANISM
    Publication number: 20140148297
    Abstract: A differential device has a clutch which is provided between at least one side gear and a differential case to limit relative rotation of the side gear and the differential case. The clutch includes one or more inner pawl discs and outer pawl discs alternately arranged in an axial direction of the side gear between an inner peripheral surface of the differential case and an outer peripheral surface of the side gear. The side gear includes a gear-side fit part extending in the axial direction to which the inner pawl disc is concave-convex fitted. The differential case includes a case-side fit parts extending in the axial direction to which the outer pawl clutch is concave-convex fitted. At least one of the gear-side fit part and the case-side fit part is formed in a spiral shape angled with respect to the axial direction.
    Type: Application
    Filed: June 7, 2013
    Publication date: May 29, 2014
    Inventor: Takuya Tomimatu