Patents by Inventor Fujio Sunami

Fujio Sunami 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).

  • Full enclosed forging apparatus
    Patent number: 6260400
    Abstract: A full enclosed forging apparatus comprising a construction in which an upper die holder and a lower die holder are respectively disposed as to face a press machine, at least one of the upper die holder and the lower die holder is composed of a holder main body holding a die and a holder base attached to the press machine, and the holder main body is attached to the holder base through plural spring mechanisms with an aperture as an interference of the spring mechanisms as that an upper punch proceeds into the upper die and a lower punch proceeds into the lower die after the upper die held by the upper die holder and the lower die held by the lower die holder contact.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: July 17, 2001
    Assignees: Gohysu Corporation, Yamanaka Eng. Co., Ltd.
    Inventors: Shigeru Nishigohri, Tadashi Okumura, Fujio Sunami