Patents by Inventor Motokazu Nagasawa

Motokazu Nagasawa 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).

  • Coaxial tube elbow and method of manufacturing the pipe elbow
    Publication number: 20040036560
    Abstract: A coaxial tube elbow has an external electric conductor tube (10) housing an internal electric conductor (20) inside and bend sections (12, 21D) formed by bending the external electric conductor tube and the internal electric conductor at a predetermined angle. The vertical section of the external electric conductor tube (10) is an arc shape at the bend section (12). The vertical section of the bend section (21D) of the internal electric conductor (20) is preferably of a partially notched arc shape. In the manufacturing of the external electric conductor tube (10), low melting point metal is filled into the external electric conductor tube of a straight shape and then the tube is bent in a metal mold. After the bending, low melting point metal is melt and removed by heating, whereby a bent external electric conductor tube (10) can be obtained. Thus the coaxial tube elbow with fewer parts allowing assembly without the use of brazing can be obtained.
    Type: Application
    Filed: May 14, 2003
    Publication date: February 26, 2004
    Inventors: Tadashi Higuchi, Yoshio Tsuchizaki, Toyohisa Takano, Motokazu Nagasawa, Masao Ryoma, Hiroshi Harima