Patents by Inventor Kenji Yuza

Kenji Yuza 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).

  • Extrusion die for forming hollow material
    Patent number: 9162267
    Abstract: An extrusion die is provided with a male die through which a billet is extruded from an upstream side to a downstream side and, the male die adapted for forming an inside shape of a hollow material; and a female die for holding the male die and forming an outside shape of the hollow material. The male die is formed of a spider and a holder for holding the spider. The spider is formed of a mandrel and a plurality of bridge parts for supporting the mandrel, and enabling a distal-end outer peripheral surface to engage with a bridge-holding surface. The distal-end outer peripheral surface of each of the bridge parts and the bridge-holding surface of the holder are joined by shrink-fitting.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: October 20, 2015
    Assignees: Nippon Light Metal Company, Ltd., Nikkeikin Aluminium Core Technology Co., Ltd.
    Inventors: Haisei Hayashi, Yuji Mochizuki, Shigenori Saito, Kenji Yuza, Hiroaki Sata, Hirohumi Sugihara
  • EXTRUSION DIE FOR FORMING HOLLOW MATERIAL
    Publication number: 20140283577
    Abstract: An extrusion die is provided with a male die through which a billet is extruded from an upstream side to a downstream side and, the male die adapted for forming an inside shape of a hollow material; and a female die for holding the male die and forming an outside shape of the hollow material. The male die is formed of a spider and a holder for holding the spider. The spider is formed of a mandrel and a plurality of bridge parts for supporting the mandrel, and enabling a distal-end outer peripheral surface to engage with a bridge-holding surface. The distal-end outer peripheral surface of each of the bridge parts and the bridge-holding surface of the holder are joined by shrink-fitting.
    Type: Application
    Filed: August 2, 2012
    Publication date: September 25, 2014
    Applicants: Nikkeiken Aluminium Core Technology Company, Ltd., Nippon Light Metal Company, Ltd.
    Inventors: Haisei Hayashi, Yuji Mochizuki, Shigenori Saito, Kenji Yuza, Hiroaki Sata, Hirofumi Sugihara