Patents by Inventor Naoki SEKIYAMA

Naoki SEKIYAMA 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).

  • Publication number: 20230212948
    Abstract: A tunnel excavation device includes a first body portion and an erector device. The first body portion includes a cutter head and a support portion rotatably supporting the cutter head. The erector device is configured to transport a supporting member toward an excavated wall surface. The erector device is provided on the support portion. The erector device includes a ring portion holding the supporting member, and a posture changing device configured to change an angle formed by a center axis of the ring portion and a rotation axis of the cutter head in a plan view.
    Type: Application
    Filed: April 20, 2021
    Publication date: July 6, 2023
    Inventors: Naoki SEKIYAMA, Hiroshi ASANO
  • Publication number: 20230203949
    Abstract: A tunnel excavation device includes a main body a frame and a workbench. The main body includes a front body section and a rear body section. The front body section includes a cutter head provided with a plurality of disk cutters. The rear body section is disposed behind the front body section and includes a gripper section for obtaining a reaction force when excavating. The frame is disposed continuously behind the main body. The workbench is disposed above the frame so as to be rotatable with respect to the frame.
    Type: Application
    Filed: April 22, 2021
    Publication date: June 29, 2023
    Inventors: Masahiro SUWANO, Naoki SEKIYAMA, Hiroshi ASANO, Taku ARAKAWA