Patents by Inventor Masatsugu Yonemura

Masatsugu Yonemura 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).

  • Joining method and joining structure as well as form for concrete products
    Patent number: 6164618
    Abstract: The present invention relates to a joining method and a joining structure as well as a form for concrete products. A protruding portion provided at the front end of a seal member of elastic material attached to one concrete product is inserted through an opening formed in a joining face of the other concrete product into an attachment hole of enlarged diameter provided at a depth of the opening, while bringing a closing press contact portion of the seal member into press contact with inner surfaces of the opening to achieve an airtight condition inside the attachment hole, followed by filling grout into a space defined between inner surfaces of the attachment hole and the protruding portion and setting the grout there to join the concrete products together.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: December 26, 2000
    Assignee: Yamax Corporation
    Inventor: Masatsugu Yonemura
  • Water cutoff junction member for concrete products to be joined together
    Patent number: 6052960
    Abstract: In order to join concrete products to be joined together each having an joining face, an opening formed in the joining face, and an attachment hole communicating with the opening, a junction member body has on its at least one end a swelled protruding portion which is inserted through the opening into the attachment hole. The junction member body further has a plurality of spaces for cleavage extending along the direction of thickness of the junction member body, each of the spaces for cleavage being cleaved open by an external force caused by an earthquake or the like, to present satisfactory extensibility and collapsibility.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: April 25, 2000
    Assignee: Yamax Corp.
    Inventor: Masatsugu Yonemura
  • Joining method and joining structure as well as form for concrete products
    Patent number: 6014849
    Abstract: The present invention relates to a joining method and a joining structure as well as a form for concrete products. A protruding portion provided at the front end of a seal member of elastic material attached to one concrete product is inserted through an opening formed in a joining face of the other concrete product into an attachment hole of enlarged diameter provided at a depth of the opening, while bringing a closing press contact portion of the seal member into press contact with inner surfaces of the opening to achieve an airtight condition inside the attachment hole, followed by filling grout into a space defined between inner surfaces of the attachment hole and the protruding portion and setting the grout there to join the concrete products together.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: January 18, 2000
    Assignee: Yamax Corporation
    Inventor: Masatsugu Yonemura