Patents by Inventor Yusho Nakayama

Yusho Nakayama 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).

  • Pressing method and punch and die press for the same
    Patent number: 4689979
    Abstract: A method of pressing a blank comprises the steps of pressing the blank between a die assembly having a cavity with a highly viscous substance contained therein and a punch, inserting the punch into the cavity to increase a pressure of the highly viscous substance in the cavity, and pressing the blank against a surface of the punch under the pressure of the highly viscous substance. The pressing method can form pressed product of complex shape highly accurately and free from cracks, wrinkles, or other damages. There is also disclosed a punch and die press suitable for effecting the abovesaid pressing method.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: September 1, 1987
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Nobuyuki Otsuka, Atsuo Kasuya, Yusho Nakayama, Masayuki Kumashiro, Tamio Furuya, Shigeo Kaiho