Patents by Inventor Tsutomu Shigeta

Tsutomu Shigeta 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).

  • Work following apparatus and method for press working
    Patent number: 4805439
    Abstract: A work following device for controlling the movement of the free portion of a work during a press working process such as a bending press working process to prevent the free portion of the work from warping due to the inertia thereof in the final stage of the press working process and for restoring the work to its initial position after the same has been pressed.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: February 21, 1989
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Shigeo Kobayashi, Osamu Yoshida, Haruo Saito, Tsutomu Shigeta, Hiroshi Nara, Shinji Abe, Kiyoharu Yamamoto
  • Automatic parts handling apparatus
    Patent number: 4720228
    Abstract: An automatic parts handling apparatus feeds a stack of accumulated pallets from a delivery apparatus to a separator apparatus that separates the lowermost pallet from the stack and conveys it to a pallet positioning apparatus whereat parts on such pallet are removed. An accumulating lifter apparatus accumulates a stack of such emptied pallets and thereafter feeds then to a storage apparatus for temporary storage thereof. The stack of pallets thus stored is fed to a discharge lifter apparatus and is elevated thereby to the deliver apparatus for further use.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: January 19, 1988
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Hujio Horiguchi, Masahide Okabe, Tsutomu Shigeta