Patents by Inventor Yuzo Yokoyama

Yuzo Yokoyama 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).

  • Method and device for lining construction in sewer followed by simultaneous filling of back-fill material
    Patent number: 7186060
    Abstract: In lining work in which a lining pipe R formed by spirally winding a strip-like member 500 consisting of an elongated sheet-form body is left in place inside a tubular culvert P, and a new lining pipe is additionally formed in front of this lining pipe that has been left in place, a lining apparatus S which has a flexible forming frame 1 consisting of link bodies is used. The strip-like member 500 is wound around the forming frame 1 by means of a joining mechanism part 7 attached to the forming frame 1, and a lining pipe R is formed while being forcibly folded inward utilizing the flexibility of the forming frame 1; at the same time, a back-filling material is injected into the inward-folded part. The inward-folded part later returns to its original state. Alternatively, the diameter of a small-diameter lining pipe R formed by winding around the forming frame 201 or 401 is expanded, and lining is performed with the back-filling material injected during this diameter expansion process.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: March 6, 2007
    Assignees: Adachi Construction Industry Co. Ltd., Sekisui Chemical Co., Ltd.
    Inventors: Eiki Akimoto, Hamao Yamashiro, Hiroshi Sugahara, Yuzo Yokoyama, Akira Imagawa, Naoki Kitahashi, Yasushi Kitayama
  • Method and device for lining construction in sewer followed by simultaneous filling of back-fill material
    Publication number: 20040013472
    Abstract: In lining work in which a lining pipe R formed by spirally winding a strip-like member 500 consisting of an elongated sheet-form body is left in place inside a tubular culvert P, and a new lining pipe is additionally formed in front of this lining pipe that has been left in place, a lining apparatus S which has a flexible forming frame 1 consisting of link bodies is used. The strip-like member 500 is wound around the forming frame 1 by means of a joining mechanism part 7 attached to the forming frame 1, and a lining pipe R is formed while being forcibly folded inward utilizing the flexibility of the forming frame 1; at the same time, a back-filling material is injected into the inward-folded part. The inward-folded part later returns to its original state. Alternatively, the diameter of a small-diameter lining pipe R formed by winding around the forming frame 201 or 401 is expanded, and lining is performed with the back-filling material injected during this diameter expansion process.
    Type: Application
    Filed: July 8, 2002
    Publication date: January 22, 2004
    Inventors: Eiki Akimoto, Hamao Yamashiro, Hiroshi Sugahara, Yuzo Yokoyama, Akira Imakawa, Naoki Kitahashi, Yasushi Kitayama