Patents by Inventor Kazuhiro Muruta

Kazuhiro Muruta 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).

  • Pressurized fluid recovery/reutilization system
    Patent number: 6378301
    Abstract: Energy of returning pressurized fluid of an actuator is recovered and reused as energy for operating other accumulators. A first pump motor (16) and a second pump motor (17) are mechanically connected to form a pressure converter (18), and a first circuit (22), to which the returning pressurized fluid is supplied, is connected to the first pump motor (16). A pressure accumulator (27) is provided to a second circuit (25) connected to the second pump motor (17). The first circuit (22) is connected to a discharge passage (11) of a primary hydraulic pump (10) by a third circuit (29) and the pressure of a high pressure pressurized fluid is supplied to the discharge passage (11) by the pressure of the high pressure pressurized fluid, and is reused.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: April 30, 2002
    Assignee: Komatsu Ltd.
    Inventors: Hiroshi Endo, Nobumi Yoshida, Kazuhiro Muruta