Patents by Inventor Takeshi Nishide

Takeshi Nishide 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).

  • Bearing device
    Patent number: 6991377
    Abstract: A bush is provided at its sliding surface with oil-supply groove portions. An area ratio of the oil-supply groove portions to the sliding surface of the journal shaft is set to 30 to 90%. A length L1 between the oil-supply groove portions in a circumferential direction and an inner diameter D of the bearing satisfy L1<?D/36. Even in a bearing device in which the journal shaft and the bush mutually rotate in a predetermined angle range or in which the journal shaft and the bush relatively and continuously rotate, the present invention can effectively be used while maintaining the existing sizes of the journal shaft and the bush, and it is possible to prevent partial break of oil film or shortage of oil film.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: January 31, 2006
    Assignee: Komatsu Limited
    Inventors: Hiroshi Yamamoto, Daijiro Ito, Takeshi Nishide
  • Bearing device
    Publication number: 20040042698
    Abstract: A bush is provided at its sliding surface with oil-supply groove portions. An area ratio of the oil-supply groove portions to the sliding surface of the journal shaft is set to 30 to 90%. A length L1 between the oil-supply groove portions in a circumferential direction and an inner diameter D of the bearing satisfy L1<&pgr;D/36. Even in a bearing device in which the journal shaft and the bush mutually rotate in a predetermined angle range or in which the journal shaft and the bush relatively and continuously rotate, the present invention can effectively be used while maintaining the existing sizes of the journal shaft and the bush, and it is possible to prevent partial break of oil film or shortage of oil film.
    Type: Application
    Filed: August 13, 2003
    Publication date: March 4, 2004
    Inventors: Hiroshi Yamamoto, Daijiro Ito, Takeshi Nishide