Patents by Inventor Jun Minamoto

Jun Minamoto 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: 5722281
    Abstract: An automobile steering rack manufacturing apparatus has a material clamp for holding a hollow pipe-like rack material that has a solid core bar inserted therein. A forming roll on the apparatus has an outer periphery with rack teeth formed thereon, while a material drive causes a mutual rolling of the material clamp and the forming roll, thereby cutting rack teeth into the material. The clamp moves in the tangential direction of the forming roll orientation, and a tooth depth controller controls the distance between the rack material held in the material clamp, and the forming roll.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: March 3, 1998
    Assignee: Showa Corporation
    Inventors: Tsutomu Yasuda, Jun Minamoto
  • Patent number: 5628222
    Abstract: A method of forming a hollow pipe-like rack material with rack teeth by causing mutual movement of the rack material and a forming roll is disclosed. A core bar is inserted inside the pipe-like material where the sectional profile of the core bar has a material support surface that is spaced apart from rack teeth formation portion of the rack material; the material support surface being raised.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: May 13, 1997
    Assignee: Showa Corporation
    Inventors: Tsutomu Yasuda, Jun Minamoto