Patents by Inventor Norihito Kohama

Norihito Kohama 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).

  • Sealed vessel and a process for producing the same
    Patent number: 4934552
    Abstract: A sealed vessel including a cylindrical body portion having an open end, and a cover fitting in the open end of the body portion, said sealed vessel being produced by pressing the open end of the body portion from the outside of the body portion to an outer peripheral surface of the cover provided with at least one of annular grooves around the outer peripheral surface of the cover to air-tightly fix the open end of the body portion and a process for producing the same are disclosed. According to the present invention, it is not necessary to perform any work such as a groove formation on a surface of the body portion but only necessary to provide one or more grooves on the outer peripheral surface of the cover. And in the case of using an electromagnetic force as the means for press-working, a part of the body portion is strictly and air-tightly fixed to the annular grooves at a moment and thus the sealed vessel can be produced with ease and at low costs.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: June 19, 1990
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Shigeyuki Koide, Osamu Usami, Tunehisa Sekiguchi, Norihito Kohama