公开(公告)号：US20230273381A1

公开(公告)日：2023-08-31

申请号：US18016115

申请日：2021-08-25

Applicant: Fujikura Ltd. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Soichiro Kaneko ,  Masatoshi Ohno ,  Akira Namazue ,  Ken Osato ,  Yusuke Yamada ,  Yuta Maruo ,  Akira Sakurai ,  Shigekatsu Tetsutani ,  Hiroaki Tanioka

IPC: G02B6/44

CPC classification number: G02B6/4429

Abstract: An optical fiber cable includes: a sheath; and a core including twisted optical fibers disposed in an accommodation space in the sheath. Each of the twisted optical fibers includes: a glass portion, a primary layer that covers the glass portion, and a secondary layer that covers the primary layer. A fiber pulling force when pulling out the twisted optical fibers is equal to or greater 15 N/10 m. A value of an index Q is less than 20.

公开(公告)号：US20190227248A1

公开(公告)日：2019-07-25

申请号：US16312669

申请日：2017-07-31

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Mizuki Isaji ,  Masatoshi Ohno ,  Shinnosuke Sato ,  Kouji Tomikawa ,  Akira Namazue ,  Ken Osato ,  Naoki Nakagawa ,  Yuji Aoyagi ,  Shigekatsu Tetsutani

IPC: G02B6/44

Abstract: An optical fiber cable includes: a core comprising gathered optical fibers; an inner sheath housing the core; a wire body embedded in the inner sheath; tension members embedded in the inner sheath, wherein the core is interposed between the tension members; a reinforcing sheet that covers the inner sheath; and an outer sheath that covers the reinforcing sheet, wherein in the inner sheath, ti

公开(公告)号：US20230152548A1

公开(公告)日：2023-05-18

申请号：US18155309

申请日：2023-01-17

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Masatoshi Ohno ,  Akira Namazue ,  Ken Osato ,  Yusuke Yamada ,  Yuta Maruo ,  Akira Sakurai ,  Shigekatsu Tetsutani ,  Hiroaki Tanioka

IPC: G02B6/44

CPC classification number: G02B6/448 ,  G02B6/4413 ,  G02B6/4404 ,  G02B6/4434 ,  G02B6/4432

Abstract: An optical cable includes: twisted optical fiber units each including a fiber group formed by optical fibers. At least one of the optical fiber units includes a filling that wraps an outer circumference of the fiber group.

公开(公告)号：US20220390701A1

公开(公告)日：2022-12-08

申请号：US17774983

申请日：2021-01-19

Applicant: FUJIKURA LTD.

Inventor： Okimi Mukai ,  Masatoshi Ohno ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes: a core including optical fibers; an interposed layer including fibers wound around the core in an SZ shape; a reinforcing layer including metal and covering the interposed layer; and a sheath covering the reinforcing layer.

公开(公告)号：US11215780B2

公开(公告)日：2022-01-04

申请号：US16645996

申请日：2018-12-11

Applicant: Fujikura Ltd. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Masatoshi Ohno ,  Kouji Tomikawa ,  Ken Osato ,  Hiroaki Tanioka ,  Shigekatsu Tetsutani ,  Yohei Endo ,  Yuta Maruo

IPC: G02B6/44

Abstract: An optical fiber cable includes: a cable body having a core and an inner sheath that accommodates the core; a reinforcing sheet that surrounds the cable body; an outer sheath that accommodates the cable body and the reinforcing sheet; and an outer ripcord that is embedded in the inner sheath. The inner sheath includes a projection that projects outwardly in a radial direction of the optical fiber cable. At least part of the outer ripcord is disposed inside the projection.

公开(公告)号：US20210278616A1

公开(公告)日：2021-09-09

申请号：US16340626

申请日：2017-11-17

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Shinnosuke Sato ,  Mizuki Isaji ,  Kouji Tomikawa ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes a core that includes an assembled plurality of optical fibers; an inner sheath that accommodates the core therein, a pair of tension members that are embedded in the inner sheath and that are disposed on opposite sides of the core, and an outer sheath that covers the inner sheath. The inner sheath is formed with a dividing portion that divides an inner peripheral surface and an outer peripheral surface of the inner sheath in a circumferential direction. The dividing portion extends along a longitudinal direction in which the optical fiber cable extends.

公开(公告)号：US12013586B2

公开(公告)日：2024-06-18

申请号：US17925400

申请日：2021-02-16

Applicant: Fujikura Ltd.

Inventor： Masatoshi Ohno ,  Akira Namazue ,  Ken Osato

IPC: G02B6/46 ,  G02B6/44

CPC classification number: G02B6/566 ,  G02B6/4429

Abstract: An optical fiber cable includes: a cable body that includes an optical fiber; an external sheath that accommodates the cable body; a protective layer that is disposed between the cable body and the external sheath and that includes a first groove on an inner circumferential surface of the protective layer, wherein the first groove extends along an axial direction of the cable body; and a first ripcord disposed in the first groove and between the cable body and the protective layer.

公开(公告)号：US11921341B2

公开(公告)日：2024-03-05

申请号：US18155309

申请日：2023-01-17

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Masatoshi Ohno ,  Akira Namazue ,  Ken Osato ,  Yusuke Yamada ,  Yuta Maruo ,  Akira Sakurai ,  Shigekatsu Tetsutani ,  Hiroaki Tanioka

IPC: G02B6/44

CPC classification number: G02B6/448 ,  G02B6/4404 ,  G02B6/4413 ,  G02B6/4432 ,  G02B6/4434

Abstract: An optical cable includes: twisted optical fiber units each including a fiber group formed by optical fibers. At least one of the optical fiber units includes a filling that wraps an outer circumference of the fiber group.

公开(公告)号：US20220342172A1

公开(公告)日：2022-10-27

申请号：US17763950

申请日：2020-11-09

Applicant: Fujikura Ltd.

Inventor： Masatoshi Ohno ,  Okimi Mukai ,  Go Taki ,  Shogo Shimizu ,  Ryo Inagaki ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44 ,  G02B6/25

Abstract: A method of exposing a core of an optical fiber cable that includes: a core including an optical fiber; a wrapping tube wrapping the core; a jacket housing the core and the wrapping tube; and a tension-resisting member of a Fiber Reinforced Plastic (FRP) embedded in the jacket, includes: making a cut in a circumferential direction in the jacket at a position closer to a first end portion of the optical fiber cable than to a second end portion of the optical fiber cable in a longitudinal direction; bending the optical fiber cable at a portion having the cut and fracturing the tension-resisting member; and removing a removal portion of the jacket that is disposed between the cut and the first end portion.

公开(公告)号：US11262515B2

公开(公告)日：2022-03-01

申请号：US16340626

申请日：2017-11-17

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Shinnosuke Sato ,  Mizuki Isaji ,  Kouji Tomikawa ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes a core that includes an assembled plurality of optical fibers; an inner sheath that accommodates the core therein, a pair of tension members that are embedded in the inner sheath and that are disposed on opposite sides of the core, and an outer sheath that covers the inner sheath. The inner sheath is formed with a dividing portion that divides an inner peripheral surface and an outer peripheral surface of the inner sheath in a circumferential direction. The dividing portion extends along a longitudinal direction in which the optical fiber cable extends.