Patents by Inventor Tsutaru KUMAGAI

Tsutaru KUMAGAI 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).

  • Publication number: 20240248269
    Abstract: An optical wiring component includes an optical fiber having a first end portion and a second end portion, an optical connector configured on a base and configured to hold the first end portion, and an optical connection member configured to hold the second end portion. The optical fiber includes one or a plurality of optical fibers. The optical connector includes one or a plurality of optical connectors.
    Type: Application
    Filed: June 1, 2022
    Publication date: July 25, 2024
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Tsutaru KUMAGAI
  • Publication number: 20230400644
    Abstract: An optical fiber connection component is provided with: a glass plate that has a plurality of first through-holes; a resin ferule that has a plurality of second through-holes respectively coaxial to the first through-holes and that is fixed to the glass plate; and a plurality of optical fibers that is arranged on a surface of the resin ferrule. One or more glass fibers disposed within each of the plurality of optical fibers, a surface of each of the glass fibers being covered with a resin coating, and a portion of each of the glass fibers being exposed from a tip of each of the optical fibers. The exposed portion of each of the glass fibers is held in a corresponding one of the first through-holes and a corresponding one of the second through-holes.
    Type: Application
    Filed: August 28, 2023
    Publication date: December 14, 2023
    Inventors: Tetsuya NAKANISHI, Tsutaru KUMAGAI, Hajime ARAO
  • Publication number: 20230375792
    Abstract: The optical connection structure includes: optical fibers disposed such that end faces are arranged in a first direction; an optical functional component having a first surface facing the end faces of the optical fibers; a holding member having a second surface facing the first surface and directly or indirectly fixed to the first surface, a third surface facing away from the second surface, and a fiber holding holes extending from the third surface toward the second surface and respectively accommodating the optical fibers; and a distortion suppression member having a fourth surface facing the third surface and directly or indirectly fixed to the third surface and sandwiching the holding member with the optical functional component. Thermal expansion coefficients of the optical functional component and the distortion suppression member are higher or lower than a thermal expansion coefficient of the holding member.
    Type: Application
    Filed: December 20, 2021
    Publication date: November 23, 2023
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tsutaru KUMAGAI, Tetsuya NAKANISHI, Hajime ARAO, Yuuichi MITOSE
  • Patent number: 11782222
    Abstract: An optical fiber connecting component includes a glass plate having a plurality of first through holes, a resin ferrule fixed to the glass plate and having a plurality of second through holes that are each coaxial with corresponding one of the plurality of first through holes, and a plurality of optical fibers including a glass fiber and a resin coating that covers the glass fiber. The glass fiber exposed from a tip of each of the optical fibers is held in corresponding one of the first through holes and corresponding one of the second through holes, and a material for the resin ferrule has a flexural modulus of 5 GPa or more at 200° C.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: October 10, 2023
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tetsuya Nakanishi, Tsutaru Kumagai, Hajime Arao
  • Publication number: 20220413229
    Abstract: An optical fiber connecting component includes a glass plate having a plurality of first through holes, a resin ferrule fixed to the glass plate and having a plurality of second through holes that are each coaxial with corresponding one of the plurality of first through holes, and a plurality of optical fibers including a glass fiber and a resin coating that covers the glass fiber. The glass fiber exposed from a tip of each of the optical fibers is held in corresponding one of the first through holes and corresponding one of the second through holes, and a material for the resin ferrule has a flexural modulus of 5 GPa or more at 200° C.
    Type: Application
    Filed: October 30, 2020
    Publication date: December 29, 2022
    Inventors: Tetsuya NAKANISHI, Tsutaru KUMAGAI, Hajime ARAO
  • Publication number: 20220308295
    Abstract: A circuit board with an optical path conversion component includes a circuit board having a main surface, an optical path conversion component connected to the circuit board, and one or more first fiber ribbons. Each of the one or more first fiber ribbons has a first end and a second end, and includes a plurality of optical fibers optically coupled to the conversion component at the first end. The one or more first fiber ribbons extend in a direction crossing a normal of the main surface. The conversion component has at least one channel group for each of the one or more first fiber ribbons, the at least one channel group including a plurality of channels optically coupled respectively to the plurality of optical fibers. The plurality of channels are arranged in a direction crossing the main surface for each of the at least one channel group.
    Type: Application
    Filed: April 12, 2021
    Publication date: September 29, 2022
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hong Chuyen NGUYEN, Tetsuya NAKANISHI, Tsutaru KUMAGAI