Patents by Inventor Tetsuji Ueda

Tetsuji Ueda 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: 5499310
    Abstract: The ferrule of a simplified field assembly optical fiber connector in which adhesive material is unnecessary for assembling. The sleeve body, enclosing the rear, end portion of the capillary, is provided with a window-like and rectangular-shaped opening about its middle point. Both side surfaces of the remaining portion of the sleeve body at the window section are dented with respect to the other portion of the sleeve body. The inlaid part is made of resilient material and has the opened-rectangular-shaped inner surface, such that it can be inlaid in the outer surface of the dented portion of the sleeve body, in other words, the window section. Along the central axis of the inner surface, the inlaid part is provided with the groove throughout the whole length, such that it can press the optical fiber with jacket against the groove, when the inlaid part is fitted in the window section.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: March 12, 1996
    Assignee: NEC Corporation
    Inventor: Tetsuji Ueda
  • Patent number: 5313540
    Abstract: An optical fiber terminal capable of automatic assembly is disclosed. The terminal includes a ferrule of substantially cylindrical shape provided with a bore directed generally longitudinally to guide an optical fiber and with at least one projection on the outer periphery of the ferrule, a housing for receiving the ferrule made up of sections of a longitudinally cut tubular member with the inner periphery having a configuration which permits the ferrule to be held longitudinally slidably and a stopper to define the most forward position of the projection of the ferrule, and at least one resilient member which resiliently forces the projection of the ferrule forward with respect to the housing.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: May 17, 1994
    Assignee: NEC Corporation
    Inventors: Tetsuji Ueda, Kazuhiko Kurata, Koji Yamamoto
  • Patent number: 5295213
    Abstract: A ferrule for an optical connector is of glass which is strengthened by ion-exchange.
    Type: Grant
    Filed: July 13, 1992
    Date of Patent: March 15, 1994
    Assignees: NEC Corporation, Nippon Electric Glass Co., Ltd.
    Inventors: Tetsuji Ueda, Kazuhiko Kurata, Nobuo Funabiki, Masayo Hada
  • Patent number: 5278929
    Abstract: An optical module comprises a capillary in which first and second optical fibers are connected. The first optical fiber is aligned through a lens to an optical device, and the second optical fiber functions as a pigtail cord connected to an external optical fiber. The first optical fiber is a TEC (thermal expand core) fiber having an end portion whose core diameter is larger than that of the other portion thereof, and the first optical fiber is a normal optical fiber which has a uniform core diameter smaller than the core diameter of the TEC fiber.
    Type: Grant
    Filed: May 11, 1992
    Date of Patent: January 11, 1994
    Assignee: NEC Corporation
    Inventors: Yasuhisa Tanisawa, Tetsuji Ueda
  • Patent number: 5278928
    Abstract: Optical fiber connector comprises a ferrule receiving an optical fiber and a sleeve member for holding the ferrule. The body of the ferrule is made of glass on which a thin layer is deposited for reinforcement of the body. The thin layer may be made by hydrolysis, chemical vapor deposition, spray coating etc. The ferrule of the optical fiber connector is inexpensive, easy to assemble and suitable for mass production.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: January 11, 1994
    Assignee: NEC Corporation
    Inventors: Tetsuji Ueda, Yasuhisa Tanisawa