Patents by Inventor Tadao Osuka

Tadao Osuka 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).

  • Hybrid construction machine
    Patent number: 8532855
    Abstract: A hybrid construction machine includes an engine, a hydraulic pump configured to be driven by the engine, a hydraulic actuator configured to be driven with a hydraulic pressure from the hydraulic pump, an electric motor configured to assist the driving of the engine, and a generator configured to be driven by the engine to generate power. The number of revolutions of the engine is caused to vary in accordance with the size of a load on the engine. In response to a decrease in the load requested of the engine, the engine is decelerated by causing the generator to generate power. In response to an increase in the load requested of the engine, the engine is accelerated by assisting the engine by driving the electric motor.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: September 10, 2013
    Assignees: Sumitomo Heavy Industries, Ltd., Sumitomo(S.H.I.) Construction Machinery Co., Ltd.
    Inventors: Masato Koga, Hiroso Shono, Tadao Osuka, Takashi Kubo
  • HYBRID CONSTRUCTION MACHINE
    Publication number: 20110098873
    Abstract: A hybrid construction machine includes an engine, a hydraulic pump configured to be driven by the engine, a hydraulic actuator configured to be driven with a hydraulic pressure from the hydraulic pump, an electric motor configured to assist the driving of the engine, and a generator configured to be driven by the engine to generate power. The number of revolutions of the engine is caused to vary in accordance with the size of a load on the engine. In response to a decrease in the load requested of the engine, the engine is decelerated by causing the generator to generate power. In response to an increase in the load requested of the engine, the engine is accelerated by assisting the engine by driving the electric motor.
    Type: Application
    Filed: June 25, 2009
    Publication date: April 28, 2011
    Inventors: Masato Koga, Hiroso Shono, Tadao Osuka, Takashi Kubo