Patents by Inventor Kuniharu Shutoh

Kuniharu Shutoh 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).

  • Patent number: 4565664
    Abstract: Herein disclosed is a process of manufacturing drawn tubing, in which steps of applying a lubricant to the surface of a bottomed blank fitted on a mandrel, pushing out the mandrel to draw the blank through a die, and pulling in the drawn blank together with the mandrel out of the die are repeated in the recited order. The drawn blank is turned a predetermined angle, e.g., 180 degrees on the axis thereof during each of the repeating steps i.e., during or after the pulling step. As a result, the lubricant can be applied to another portion of the blank surface at a second or subsequent applying step so that the working conditions which might otherwise become different to cause the drawn blank to have a locally irregular or offset thickness can be made uniform in the circumferential direction of the blank.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: January 21, 1986
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Shigeki Ikehata, Kuniharu Shutoh, Kazuya Aoyagi