Patents by Inventor Nobuhisa Tako

Nobuhisa Tako 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).

  • Manufacturing method for cylindrical part
    Patent number: 7082805
    Abstract: It is an object of the present invention to provide a method of manufacturing a cylindrical part with a thin-walled portion at a lower cost, and according to the manufacturing method of the present invention, a base metal formed with thin-walled portion adjacent to its closed end can be easily detached from working jigs. According to the method, a thin-walled portion is at first formed by the ironing process on a cylindrical wall adjacent to the closed end, so that an outer-side step portion is formed on an outer peripheral surface of the cylindrical wall. Then the closed end is punched out and the thin-walled portion is enlarged in a radial and outward direction to form an inner-side step portion on an inner peripheral surface of the cylindrical part.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: August 1, 2006
    Assignees: Denso Corporation, Nihon Pakkin Co., Ltd.
    Inventors: Shinichi Ezaka, Satoshi Sugiyama, Tomohiro Matsuura, Takafumi Watanabe, Tatsuya Ito, Nobuhisa Tako
  • Manufacturing method for cylindrical part
    Publication number: 20050115050
    Abstract: It is an object of the present invention to provide a method of manufacturing a cylindrical part with a thin-walled portion at a lower cost, and according to the manufacturing method of the present invention, a base metal formed with thin-walled portion adjacent to its closed end can be easily detached from working jigs. According to the method, a thin-walled portion is at first formed by the ironing process on a cylindrical wall adjacent to the closed end, so that an outer-side step portion is formed on an outer peripheral surface of the cylindrical wall. Then the closed end is punched out and the thin-walled portion is enlarged in a radial and outward direction to form an inner-side step portion on an inner peripheral surface of the cylindrical part.
    Type: Application
    Filed: November 1, 2004
    Publication date: June 2, 2005
    Applicant: DENSO CORPORATION
    Inventors: Shinichi Ezaka, Satoshi Sugiyama, Tomohiro Matsuura, Takafumi Watanabe, Tatsuya Ito, Nobuhisa Tako