Patents by Inventor Jun-ichi Tsumura

Jun-ichi Tsumura 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).

  • Rolling mill driving mechanism
    Patent number: 5230236
    Abstract: The invention is directed to provide a rolling method which enables an enlarged range of reduction ratio in sizing-rolling in the common drive system. The invention provides that when tension applied to rolled material between the upstream and downstream-placed mills is made higher than a value that tension/average resistance to deformation of rolled material is 0.2, the upstream-placed mill is caused to perform force rolling, and when compressive force of the rolled material is made higher than a value that compressive force/average resistance to deformation of rolled material is 0.1, the downstream-placed mill together with the upstream-placed mill are caused to perform tensile rolling in the common drive system. The rolling methods provides a stable rolling in a larger sizing range without decrease of diameter or buckling of rolled material.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: July 27, 1993
    Assignees: Nippon Steel Corporation, Hitachi Zosen Corporation
    Inventors: Mitsuru Nakamura, Yutaka Toda, Yukio Noguchi, Toshihiro Ishibashi, Ichizo Taguchi, Jun-ichi Tsumura