Patents by Inventor Waka Izumi

Waka 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).

  • Multi disc friction clutch and motorcycle therewith
    Patent number: 7681705
    Abstract: A multiple disc friction clutch comprises a clutch outer for take in power, a clutch hub for take out power, friction plates, a clutch spring pressing a pressing member to the friction plates for connecting the clutch, a spring receiving member supporting the clutch spring, and a coupling hub coupled to the spring receiving member as to be integrally movable. A spline inclined against an output axis is formed in a fitting portion between the coupling hub and a tube shaft, and moves the clutch spring in an axial direction of the tube shaft to a compressing side while relatively rotating the coupling hub against the tube shaft, in the case that an engine drive torque is equal to or more than a predetermined value, thereby increasing a pressing load.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: March 23, 2010
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Yoshio Okada, Hiroyuki Kikuchi, Hiroyuki Watanabe, Waka Izumi, Takahiro Jozaki
  • Multi disc friction clutch and motorcycle therewith
    Publication number: 20070221465
    Abstract: A multiple disc friction clutch comprises a clutch outer for take in power, a clutch hub for take out power, friction plates, a clutch spring pressing a pressing member to the friction plates for connecting the clutch, a spring receiving member supporting the clutch spring, and a coupling hub coupled to the spring receiving member as to be integrally movable. A spline inclined against an output axis is formed in a fitting portion between the coupling hub and a tube shaft, and moves the clutch spring in an axial direction of the tube shaft to a compressing side while relatively rotating the coupling hub against the tube shaft, in the case that an engine drive torque is equal to or more than a predetermined value, thereby increasing a pressing load.
    Type: Application
    Filed: March 13, 2007
    Publication date: September 27, 2007
    Inventors: Yoshio Okada, Hiroyuki Kikuchi, Hiroyuki Watanabe, Waka Izumi, Takahiro Jozaki