Patents by Inventor Eiji Kitagami

Eiji Kitagami 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).

  • Securing method of polymer insulator and die used for this method
    Patent number: 6055717
    Abstract: A securing method of a polymer insulator including the steps of inserting an FRP core into a depression portion of a metal member having an open end portion, and connecting the metal member to the FRP core by compressing the FRP core and the metal member is disclosed. The improvement includes the steps of: determining a first region defining a part of a compression portion of the metal member, to which a compression pressure is applied, from a side of the open end portion; determining a second region defining the other part of the compression portion in succession with the first region; and controlling a deformation of the first region in such a manner that a deformation amount of the first region is increased gradually toward the second region.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: May 2, 2000
    Assignee: NGK Insulators, Ltd.
    Inventors: Itsushi Nakamura, Yasushi Ohkawa, Tomio Suzuki, Eiji Kitagami