Patents by Inventor Shouji Toma

Shouji Toma 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 of producing a multiple-wall pipe structure with anticorrosion end protection
    Patent number: 4542846
    Abstract: A multiple-wall pipe structure having at least two pipes tightly fitted one within another, one of which is of a corrosion-resistant material whereas the other is of a noncorrosion-resistant material. In order to protect against corrosion the end faces of the noncorrosion-resistant pipe and the seams between the two pipes, either during storage in the form of discrete pipe sections or in use by being welded or otherwise jointed end to end, a pair of anticorrosion rings of a corrosion-resistant material are integrally attached to the opposite ends of the fitted pipes so as to cover at least the end faces of the noncorrosion-resistant pipe and to seal the seams therebetween.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: September 24, 1985
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Shigetomo Matsui, Toshio Atsuta, Shouji Toma