Patents by Inventor Mitsuhira Kitada

Mitsuhira Kitada 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).

  • Method for making a joint between a main pipe and a branch pipe and apparatus for use in the method
    Patent number: 5445309
    Abstract: In a method for making a joined pipe, a main pipe is cut so that two V-shaped edges of a right angle are formed in the diametrical positions on the periphery of the main pipe, and a branch pipe is cut so that two peaked edges of a right angle are formed in the diametrical positions on the periphery of the branch pipe. Then, the facets of the V-shaped edges and the peaked edges are fused by heating, and butt-welded under pressure.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: August 29, 1995
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yonekazu Yamada, Yutaka Yoshino, Mitsuhira Kitada, Kazuo Seki