Patents by Inventor Kazuaki Kawamura

Kazuaki Kawamura 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).

  • Hydraulic type tensioner with relief valve
    Patent number: 6729986
    Abstract: The present invention relates to a hydraulic type tensioner with a relief valve. In this tensioner, a relief valve, which is opened and closed in accordance with the oil pressure of oil supplied under pressure from an oil pressure generating source such as an oil pump or the like through an oil supply port, is provided in a bypass oil path, which detours a check valve mechanism formed in a tensioner body and communicates between the oil supply port and a high pressure oil chamber.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: May 4, 2004
    Assignee: Tsubakimoto Chain Co.
    Inventors: Junya Kurohata, Hisashi Tomioka, Kazuaki Kawamura
  • Hydraulic type tensioner with relief valve
    Publication number: 20020169042
    Abstract: The present invention relates to a hydraulic type tensioner with a relief valve. In this tensioner, a relief valve, which is opened and closed in accordance with the oil pressure of oil supplied under pressure from an oil pressure generating source such as an oil pump or the like through an oil supply port, is provided in a bypass oil path, which detours a check valve mechanism formed in a tensioner body and communicates between the oil supply port and a high pressure oil chamber.
    Type: Application
    Filed: May 1, 2002
    Publication date: November 14, 2002
    Inventors: Junya Kurohata, Hisashi Tomioka, Kazuaki Kawamura