Patents by Inventor Toshifumi Takagi

Toshifumi Takagi 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).

  • Apparatus for tightly fixing an optical connector to an optical cable
    Patent number: 7215868
    Abstract: In a fixing apparatus for fixing an optical connector to an optical cable having an optical fiber and wire members arranged around the optical fiber, the fixing apparatus includes first, second, and third holding members. The first holding member is adapted to be inserted between the wire member and the optical fiber. The second holding member is adapted to be disposed outside the wire members, the second holding member cooperating with the first holding member to tightly hold the wire members therebetween. The third holding member surrounding the second holding member and having an axial end portion adapted to be engaged with the second holding member in a rotation direction with respect to the optical cable. In addition, the third holding member has another axial end portion adapted to be connected to the optical connector.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: May 8, 2007
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventors: Hideto Shimazu, Akihiro Onogawa, Yuichi Koreeda, Haruyuki Koshimizu, Toshifumi Takagi, Kiyoyuki Mutaguchi, Kiyokazu Fukudome
  • Method of producing a receptacle-type optical connector
    Patent number: 7204643
    Abstract: In a receptacle-type optical connector to be connected to a plug-type optical connector connected to an optical fiber terminated by the use of a ferrule, use is made of a base shell, a front shell, and an intermediate shell which is interposed between the base shell and the front shell. The base shell has a core coupling portion for coupling a core of the optical fiber. The front shell has an opening which is shaped in conformity with a plug shape of the plug-type optical connector. The intermediate shell is partly fitted to the base shell. The intermediate shell has a cylindrical protrusion which is shaped in conformity with the ferrule and which is inserted into the opening.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: April 17, 2007
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventors: Akihiro Onogawa, Toshifumi Takagi, Yasutaka Hiroki, Hirotada Kobayashi
  • Method of producing a receptacle-type optical connector
    Publication number: 20060269193
    Abstract: In a receptacle-type optical connector to be connected to a plug-type optical connector connected to an optical fiber terminated by the use of a ferrule, use is made of a base shell, a front shell, and an intermediate shell which is interposed between the base shell and the front shell. The base shell has a core coupling portion for coupling a core of the optical fiber. The front shell has an opening which is shaped in conformity with a plug shape of the plug-type optical connector. The intermediate shell is partly fitted to the base shell. The intermediate shell has a cylindrical protrusion which is shaped in conformity with the ferrule and which is inserted into the opening.
    Type: Application
    Filed: August 7, 2006
    Publication date: November 30, 2006
    Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Akihiro Onogawa, Toshifumi Takagi, Yasutaka Hiroki, Hirotada Kobayashi
  • Receptacle-type optical connector easily adaptable to various specifications and method of producing the same
    Patent number: 7118282
    Abstract: In a receptacle-type optical connector to be connected to a plug-type optical connector connected to an optical fiber terminated by the use of a ferrule, use is made of a base shell, a front shell, and an intermediate shell which is interposed between the base shell and the front shell. The base shell has a core coupling portion for coupling a core of the optical fiber. The front shell has an opening which is shaped in conformity with a plug shape of the plug-type optical connector. The intermediate shell is partly fitted to the base shell. The intermediate shell has a cylindrical protrusion which is shaped in conformity with the ferrule and which is inserted into the opening.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: October 10, 2006
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventors: Akihiro Onogawa, Toshifumi Takagi, Yasutaka Hiroki, Hirotada Kobayashi
  • Apparatus for tightly fixing an optical connector to an optical cable
    Publication number: 20060115229
    Abstract: In a fixing apparatus for fixing an optical connector to an optical cable having an optical fiber and wire members arranged around the optical fiber, the fixing apparatus includes first, second, and third holding members. The first holding member is adapted to be inserted between the wire member and the optical fiber. The second holding member is adapted to be disposed outside the wire members, the second holding member cooperating with the first holding member to tightly hold the wire members therebetween. The third holding member surrounding the second holding member and having an axial end portion adapted to be engaged with the second holding member in a rotation direction with respect to the optical cable. In addition, the third holding member has another axial end portion adapted to be connected to the optical connector.
    Type: Application
    Filed: November 29, 2005
    Publication date: June 1, 2006
    Inventors: Hideto Shimazu, Akihiro Onogawa, Yuichi Koreeda, Haruyuki Koshimizu, Toshifumi Takagi, Kiyoyuki Mutaguchi, Kiyokazu Fukudome
  • Receptacle-type optical connector easily adaptable to various specifications and method of producing the same
    Publication number: 20050069263
    Abstract: In a receptacle-type optical connector to be connected to a plug-type optical connector connected to an optical fiber terminated by the use of a ferrule, use is made of a base shell, a front shell, and an intermediate shell which is interposed between the base shell and the front shell. The base shell has a core coupling portion for coupling a core of the optical fiber. The front shell has an opening which is shaped in conformity with a plug shape of the plug-type optical connector. The intermediate shell is partly fitted to the base shell. The intermediate shell has a cylindrical protrusion which is shaped in conformity with the ferrule and which is inserted into the opening.
    Type: Application
    Filed: September 29, 2004
    Publication date: March 31, 2005
    Applicant: Japan Aviation Electronics Industry, Limited
    Inventors: Akihiro Onogawa, Toshifumi Takagi, Yasutaka Hiroki, Hirotada Kobayashi