Patents by Inventor Yosihiro Tobita

Yosihiro Tobita 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).

  • Cell safety valve and method for manufacturing the same
    Patent number: 6571816
    Abstract: A cell safety valve which has a thin valve plate formed on a sheet-shaped sealing plate for sealing the cell such that if the inner pressure of the cell exceeds a predetermined value, the valve plate breaks to release a gas in the cell to the outside, in which the valve plate has a dome-shaped dome portion formed thereon and, at its middle or near it, a break groove formed for facilitating the breaking of the valve. By this construction, it is possible to prevent the electrolyte from leaking while reducing the cell-to-cell difference in the operating pressure of the safety valve and ensuring a sufficient open area at the time of the operations of the safety valve.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: June 3, 2003
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takuma Morishita, Hironori Marubayashi, Shigeki Fujii, Yosihiro Tobita
  • Cell safety valve and method for manufacturing the same
    Publication number: 20010027807
    Abstract: A cell safety valve which has a thin valve plate formed on a sheet-shaped sealing plate for sealing the cell such that if the inner pressure of the cell exceeds a predetermined value, the valve plate breaks to release a gas in the cell to the outside, in which the valve plate has a dome-shaped dome portion formed thereon and, at its middle or near it, a break groove formed for facilitating the breaking of the valve.
    Type: Application
    Filed: March 7, 2001
    Publication date: October 11, 2001
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Takuma Morishita, Hironori Marubayashi, Shigeki Fujii, Yosihiro Tobita