Patents by Inventor Sadao Oiko

Sadao Oiko 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).

  • Two-layer clad pipe
    Patent number: 6659137
    Abstract: An outer pipe 10 and an inner pipe 12 are formed by drawing. Inner pipe 12 is inserted into outer pipe 10 and a metal core 14 is inserted into inner pipe 12. From this state, drawing is performed so that outer pipe 10 presses tightly against inner pipe 12. Metal core 14 is pulled out, resulting in a two-layer clad pipe 15. Alternatively, a two-layer clad pipe can also be made by drawing outer pipe 10 and inner pipe 12 without inserting metal core 14.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: December 9, 2003
    Assignee: Suncall Corporation
    Inventors: Katsuhiro Imasaki, Hiroyuki Furukawa, Toshitsugu Ookubo, Sadao Oiko
  • Two-layer clad pipe and method for making the same
    Publication number: 20030094209
    Abstract: An outer pipe 10 and an inner pipe 12 are formed by drawing. Inner pipe 12 is inserted into outer pipe 10 and a metal core 14 is inserted into inner pipe 12. From this state, drawing is performed so that outer pipe 10 presses tightly against inner pipe 12. Metal core 14 is pulled out, resulting in a two-layer clad pipe 15. Alternatively, a two-layer clad pipe can also be made by drawing outer pipe 10 and inner pipe 12 without inserting metal core 14.
    Type: Application
    Filed: January 8, 2003
    Publication date: May 22, 2003
    Applicant: Suncall Corporation
    Inventors: Katsuhiro Imasaki, Hiroyuki Furukawa, Toshitsugu Ookubo, Sadao Oiko
  • Two-layer clad pipe and method for making the same
    Publication number: 20020008133
    Abstract: An outer pipe 10 and an inner pipe 12 are formed by drawing. Inner pipe 12 is inserted into outer pipe 10 and a metal core 14 is inserted into inner pipe 12. From this state, drawing is performed so that outer pipe 10 presses tightly against inner pipe 12. Metal core 14 is pulled out, resulting in a two-layer clad pipe 15. Alternatively, a two-layer clad pipe can also be made by drawing outer pipe 10 and inner pipe 12 without inserting metal core 14.
    Type: Application
    Filed: June 14, 2001
    Publication date: January 24, 2002
    Inventors: Katsuhiro Imasaki, Hiroyuki Furukawa, Toshitsugu Ookubo, Sadao Oiko