公开(公告)号：US20200209505A1

公开(公告)日：2020-07-02

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：US20180106977A1

公开(公告)日：2018-04-19

申请号：US15567793

申请日：2016-09-02

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Daiki Takeda ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/4495 ,  G02B6/44 ,  G02B6/4433 ,  G02B6/4435

Abstract: An optical fiber cable includes: a cable main body including a core that includes optical fibers, at least a pair of tension members that face each other with the core interposed therebetween, and an inner sheath that covers the core and the tension members; a cylindrical outer sheath that accommodates the cable main body; a reinforcing sheet provided between the cable main body and the outer sheath; and a rip cord provided between the reinforcing sheet and the cable main body. The reinforcing sheet surrounds an entire circumference of the cable main body, the reinforcing sheet includes an overlapping portion in which portions of the reinforcing sheet overlap each other in a portion in a circumferential direction of the cable main body, and the reinforcing sheet is formed of a metal.

公开(公告)号：US20250004236A1

公开(公告)日：2025-01-02

申请号：US18709020

申请日：2022-11-08

Applicant: Fujikura Ltd.

Inventor： Masatoshi Ohno ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

Abstract: An optical cable includes one or more tension members, optical fibers disposed around an outer periphery of the one or more tension members, and an outer sheath housing the one or more tension members and the optical fibers. A boundary elongation of the one or more tension members is smaller than a boundary elongation of the optical fibers. The boundary elongation of the one or more tension members and the boundary elongation of the optical fibers is a cable elongation corresponding to a boundary between an initial elongation region and an elastic region.

公开(公告)号：US20230185049A1

公开(公告)日：2023-06-15

申请号：US17925400

申请日：2021-02-16

Applicant: Fujikura Ltd.

Inventor： Masatoshi Ohno ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/4497 ,  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：US11002928B2

公开(公告)日：2021-05-11

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：US10345545B2

公开(公告)日：2019-07-09

申请号：US15823798

申请日：2017-11-28

Applicant: FUJIKURA LTD.

Inventor： Tomoaki Kaji ,  Masatoshi Ohno ,  Daiki Takeda ,  Ken Osato ,  Masayoshi Yamanaka ,  Naoki Okada

IPC: G02B6/44

Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.

公开(公告)号：US10139583B2

公开(公告)日：2018-11-27

申请号：US15567793

申请日：2016-09-02

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Daiki Takeda ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes: a cable main body including a core that includes optical fibers, at least a pair of tension members that face each other with the core interposed therebetween, and an inner sheath that covers the core and the tension members; a cylindrical outer sheath that accommodates the cable main body; a reinforcing sheet provided between the cable main body and the outer sheath; and a rip cord provided between the reinforcing sheet and the cable main body. The reinforcing sheet surrounds an entire circumference of the cable main body, the reinforcing sheet includes an overlapping portion in which portions of the reinforcing sheet overlap each other in a portion in a circumferential direction of the cable main body, and the reinforcing sheet is formed of a metal.

公开(公告)号：US09869838B2

公开(公告)日：2018-01-16

申请号：US14951750

申请日：2015-11-25

Applicant: FUJIKURA, LTD.

Inventor： Tomoaki Kaji ,  Masatoshi Ohno ,  Daiki Takeda ,  Ken Osato ,  Masayoshi Yamanaka ,  Naoki Okada

IPC: G02B6/44

CPC classification number: G02B6/4433 ,  G02B6/4405 ,  G02B6/4413 ,  G02B6/4495

Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.