Patents by Inventor Motonosuke Arai

Motonosuke Arai 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).

  • Patent number: 4332504
    Abstract: An expansion joint of the construction that opposing upper wavy end face plates with a regular gap therebetween and lower wavy end face plates with the upper end thereof bonded to the lower end of the upper wavy end face plates are provided oppositely, an elastic means is interposed between said both upper wavy end face plates, upper edge of said upper wavy end face plates are provided in flush with or close to the road surface, anchor materials are provided protrudingly at the back of said both upper wavy end face plates and are connected to reinforcing material, concrete or synthetic resin is placed at the back of each of said wavy end face plates and a small gap is provided between the lower end of said lower wavy end face plate and the bottom surface of a joint fitting portion to prevent the both from touching with each other.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: June 1, 1982
    Inventor: Motonosuke Arai
  • Patent number: 3981601
    Abstract: An expansion joint comprising a joint member having opposing horizontal fixing bodies, such composed of a horizontal cushion course and a vertical cushion source made of elastic material on or under a steel flat horizontal base course, which are connected together by an expansion plate of elastic material that is formed in wave shape and comprises a flexible, flat part and an apex part, and stepped holes composed of a nut hole and an anchor bolt hole concentric with said nut hole made in said horizontal base course at regular intervals, and a method of installing such expansion joints by using an anchor bolt setter.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: September 21, 1976
    Inventor: Motonosuke Arai