Patents by Inventor Shizuo Wada

Shizuo Wada 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).

  • Flare-shaped end structure for tube
    Patent number: 7600792
    Abstract: A flared end structure formed by processing an end part of a metal tube which is pressed against a seat formed in a member by tightening a coupling nut to the member. The flared end structure has a joining end part to be pressed against the seat of the member, and a curved part continuous with the joining end part. The curved part has an outer surface having a curved area, and a concave inner surface having a bottom edge. The curved area of the outer surface has a radius of curvature smaller than the wall thickness of the metal tube.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: October 13, 2009
    Assignee: Sanoh Kogyo Kabushiki Kaisha
    Inventor: Shizuo Wada
  • Steel product with plating layers
    Patent number: 6291083
    Abstract: A Ni plating layer 3, a Cu plating layer 11, a Zn—Ni alloy plating layer 4 and a chromate layer 5 are formed sequentially in that order on the outer surface of a steel base 2. The Cu plating layer 11 interposed between the Ni plating layer and the Zn—Ni plating layer seals up pinholes in the Ni plating layer and enhances the sacrificial corroding action of the Zn—Ni alloy plating layer.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: September 18, 2001
    Assignee: Sanoh Kogyo Kabushiki Kaisha
    Inventor: Shizuo Wada