Patents by Inventor Kouichi Okugami

Kouichi Okugami 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).

  • Transmission component, method of manufacturing the same, and tapered roller bearing
    Patent number: 7682087
    Abstract: A transmission component is incorporated into a transmission in which an input shaft, an output shaft, or a gear is rotatably supported by a rolling bearing. The component has a nitriding layer at a surface layer and an austenite grain with a grain size number falling within a range exceeding 10. This provides a transmission component having an increased anti-crack strength, enhanced dimensional stability, and a long fatigue life. A method of manufacturing such a transmission component and a tapered roller bearing are also provided.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: March 23, 2010
    Assignee: NTN Corporation
    Inventors: Kouichi Okugami, Yoshinori Muramatsu, Chikara Ohki, Michio Hori
  • Differential support structure, differential's component, method of manufacturing differential support structure, and method of manufacturing differential's component
    Patent number: 7334943
    Abstract: A structure supporting a differential rotatably includes an inner ring arranged at the differential, an outer ring arranged at an external peripheral portion formed to surround the differential, and a tapered roller rolling between the inner ring and the outer ring. At least any one of the inner ring, the outer ring and the tapered roller has a carbo-nitrided layer and provides an austenite grain number falling within a range exceeding 10. Thus the structure can be provided with increased anti-crack strength and dimensional stability, and increased rolling contact fatigue life.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: February 26, 2008
    Assignee: NTN Corporation
    Inventors: Kouichi Okugami, Yoshinori Muramatsu, Chikara Ohki
  • Differential support structure, differential's component, method of manufacturing differential support structure, and method of manufacturing differential's component
    Publication number: 20040228561
    Abstract: A structure supporting a differential rotatably includes an inner ring arranged at the differential, an outer ring arranged at an external peripheral portion formed to surround the differential, and a tapered roller rolling between the inner ring and the outer ring. At least any one of the inner ring, the outer ring and the tapered roller has a carbo-nitrided layer and provides an austenite grain number falling within a range exceeding 10. Thus the structure can be provided with increased anti-crack strength and dimensional stability, and increased rolling contact fatigue life.
    Type: Application
    Filed: February 27, 2004
    Publication date: November 18, 2004
    Inventors: Kouichi Okugami, Yoshinori Muramatsu, Chikara Ohki
  • Transmission component, method of manufacturing the same, and tapered roller bearing
    Publication number: 20040170348
    Abstract: A transmission component is incorporated into a transmission in which an input shaft, an output shaft, or a gear is rotatably supported by a rolling bearing. The component has a nitriding layer at a surface layer and an austenite grain with a grain size number falling within a range exceeding 10. This provides a transmission component having an increased anti-crack strength, enhanced dimensional stability, and a long fatigue life. A method of manufacturing such a transmission component and a tapered roller bearing are also provided.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 2, 2004
    Applicant: NTN CORPORATION
    Inventors: Kouichi Okugami, Yoshinori Muramatsu, Chikara Ohki, Michio Hori