Patents by Inventor Migiei Nakamura

Migiei Nakamura 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).

  • Method and apparatus for forming internal spline ring
    Patent number: 5906127
    Abstract: An internal spline ring having an internal root circle diameter D1 and an internal tip diameter D2 is formed by axially press-driving an externally splined mandrel having an external tip diameter equal to the internal root circle diameter, which has a shape supplementarily mating with the internal spline ring, into a half-finished annular member having an internal diameter smaller than the internal tip diameter while pressing radially the half-finished annular member against the mandrel.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: May 25, 1999
    Assignee: Mazda Motor Corporation
    Inventor: Migiei Nakamura