Patents by Inventor Seiichiro Nambu

Seiichiro Nambu 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).

  • Tube expanding method for manufacturing metal tube
    Patent number: 9707614
    Abstract: Through a tube expanding processing simulation, a workpiece shape in a state where a tip of a workpiece 10 has advanced by 1.0 m or more after passing through a shoulder portion 3 of a tool 1 is evaluated. A hollow piece shape and a tool shape such that the external diameter is within ±1% of the target, the thickness is within ±7.5% of the target, and the internal gap between the hollow piece and the tool is 1.0 mm or less are obtained by repeated calculation, and thereby actual tube expanding manufacturing conditions are determined.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: July 18, 2017
    Assignee: JFE Steel Corporation
    Inventors: Tatsuro Katsumura, Noritsugu Itakura, Seiichiro Nambu, Kazutoshi Ishikawa
  • TUBE EXPANDING METHOD FOR MANUFACTURING METAL TUBE
    Publication number: 20150114073
    Abstract: Through a tube expanding processing simulation, a workpiece shape in a state where a tip of a workpiece 10 has advanced by 1.0 m or more after passing through a shoulder portion 3 of a tool 1 is evaluated. A hollow piece shape and a tool shape such that the external diameter is within ±1% of the target, the thickness is within ±7.5% of the target, and the internal gap between the hollow piece and the tool is 1.0 mm or less are obtained by repeated calculation, and thereby actual tube expanding manufacturing conditions are determined.
    Type: Application
    Filed: May 29, 2012
    Publication date: April 30, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Tatsuro Katsumura, Noritsugu Itakura, Seiichiro Nambu, Kazutoshi Ishikawa