Patents by Inventor Kouji Kumazawa

Kouji Kumazawa 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).

  • Operating lever device for construction machine and construction machine
    Patent number: 7293625
    Abstract: At the front end of an operating lever constituted as a joystick lever, a grip that is not allowed to rotate relative to the operating lever is attached. At the front end of the grip, a rotary operating member to be used for prime mover rotation speed adjustment is rotatably mounted. The operator rotates the rotary operating member with his finger tip while holding the grip and moving the operating lever to adjust the prime mover rotation rate and drive an actuator at the same time.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: November 13, 2007
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventor: Kouji Kumazawa
  • Operation lever device of construction machinery and construction machinery
    Publication number: 20050034915
    Abstract: At the front end of an operating lever constituted as a joystick lever, a grip that is not allowed to rotate relative to the operating lever is attached. At the front end of the grip, a rotary operating member to be used for prime mover rotation speed adjustment is rotatably mounted. The operator rotates the rotary operating member with his finger tip while holding the grip and moving the operating lever to adjust the prime mover rotation rate and drive an actuator at the same time.
    Type: Application
    Filed: November 5, 2002
    Publication date: February 17, 2005
    Applicant: Hitachi Construction Machinery Company, Ltd.
    Inventor: Kouji Kumazawa