Patent US4723832A successfully refreshed from Google Patents.
US4723832A
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Composite overhead cable structure for electric and optical transmission
Assignee: Fujikura Ltd
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Filing: 1985-09-11
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Granted: 1988-02-09
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Expires: 2005-09-11
Abstract
Abstract A composite overhead cable structure for electric and optical transmission comprising a pipe, at least one layer of stranded metallic elongated conductor surrounding the outer periphery of said pipe in close contact with said outer periphery, and an optical fiber cable tightly disposed within and extending throughout the length of said pipe through the medium of a packing comprised of at least one double packing layer of a non-metallic soft packing layer and a non-metallic rigid packing layer, thereby providing fixed package of said optical fiber cable in said pipe through said packing so that said optical fiber is unmovable relative to said pipe. With such a structure, the optical fiber cable is effectively prevented from not only occurrence of local bending or, but also from suffering excessive lateral forces, which leads to elimination of a danger that the optical fiber be damaged, thereby enabling the optical transmission properties to be stably maintained.
Inventors
- 👤 Akira Okazato
- 👤 Yoshikatsu Honma
- 👤 Hironori Yoshimura
- 👤 Toshiaki Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:48
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4422; H; H01; H01B; H01B5/00; H01B5/08; H01B5/10; H01B5/108
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
248 words
A composite overhead cable structure comprising: a pipe having a length and an outer peripheral wall and an inner peripheral wall; at least one layer of stranded metallic elongated conductor surrounding the outer peripheral wall of said pipe in close contact with said outer peripheral wall; an optical fiber cable having an outer peripheral wall and being disposed within and extending throughout the length of said pipe; and, tightly disposed within and extending throughout the length of an elongated space defined by the inner peripheral wall of said pipe and the outer peripheral wall of said optical fiber cable and superposed on the outer peripheral wall of said optical fiber cable, a packing comprised of at least one double packing layer of a non-metallic soft packing layer having a Young's modulus of 0.01 to 5 Kg/mm 2 and a non-metallic rigid packing layer having a Young's modulus of 20 to 400 Kg/mm 2 arranged in this order, said non-metallic rigid packing layer being contiguous to said non-metallic soft packing layer; said packing having its innermost and outermost layers which are composed of a non-metallic soft packing layer and a non-metallic rigid packing layer, respectively; said innermost layer being in close contact, at its surface, with the outer peripheral wall of said optical fiber cable and said outermost layer being in close contact, at its surface, with the inner peripheral wall of said pipe; thereby providing fixed package of said optical fiber cable in said pipe through said packing.
Claim 2
Dependent Claim
248 words
A composite overhead cable structure comprising: a pipe having a length and an outer peripheral wall and an inner peripheral wall; at least one layer of stranded metallic elongated conductor surrounding the outer peripheral wall of said pipe in close contact with said outer peripheral wall; an optical fiber cable having an outer peripheral wall and being disposed within and extending throughout the length of said pipe; and, tightly disposed within and extending throughout the length of an elongated space defined by the inner peripheral wall of said pipe and the outer peripheral wall of said optical fiber cable and superposed on the outer peripheral wall of said optical fiber cable, a packing comprised of at least one double packing layer of a non-metallic soft packing layer having a Young's modulus of 0.01 to 5 Kg/mm 2 and a non-metallic rigid packing layer having a Young's modulus of 20 to 400 Kg/mm 2 arranged in this order, said non-metallic rigid packing layer being contiguous to said non-metallic soft packing layer; said packing having its innermost and outermost layers which are composed of a non-metallic soft packing layer and a non-metallic rigid packing layer, respectively; said innermost layer being in close contact, at its surface, with the outer peripheral wall of said optical fiber cable and said outermost layer being in close contact, at its surface, with the inner peripheral wall of said pipe; thereby providing fixed package of said optical fiber cable in said pipe through said packing.
Claim 3
Dependent Claim
24 words
A cable structure according to claim 1, wherein said soft packing layer is in the form of a coat applied by extrusion or dipping.
Claim 4
Dependent Claim
45 words
A cable structure according to claim 1, wherein said soft packing layer is in the form of a layer of helically wound yarn, strand or tape or in the form of a layer of laminated tape applied along the length of the optical fiber cable.
Claim 5
Dependent Claim
24 words
A cable structure according to claim 1, wherein said rigid packing layer is in the form of a coat applied by extrusion or dipping.
Claim 6
Dependent Claim
45 words
A cable structure according to claim 1, wherein said rigid packing layer is in the form of a layer of helically wound yarn, strand or tape or in the form of a layer of laminated tape applied along the length of the optical fiber cable.
Claim 7
Dependent Claim
28 words
A cable structure according to claim 1, wherein said packing is composed of a plurality of soft packing layers and a plurality of rigid packing layers arranged alternately.
Claim 8
Dependent Claim
38 words
A cable structure according to claim 1, wherein said optical fiber cable is in the form of a buffered optical fiber comprising an optical element composed of a core and a clad and a buffer coating formed thereon.
Claim 9
Dependent Claim
45 words
A cable structure according to claim 1, wherein said optical fiber cable is in the form of a sheathed optical fiber comprising an optical element composed of a core and a clad and, applied thereonto in the following order, a buffer coating and a sheath.
Claim 10
Dependent Claim
45 words
A cable structure according to claim 1, wherein said optical fiber cable is in the form of a plurality of buffered optical fibers stranded, each buffered optical fiber comprising an optical element composed of a core and a clad and a buffer coating formed thereon.
Claim 11
Dependent Claim
52 words
A cable structure according to claim 1, wherein said optical fiber cable is in the form of a plurality of sheathed optical fibers stranded, each sheathed optical fiber comprising an optical element composed of a core and a clad and, applied thereonto in the following order, a buffer coating and a sheath.
Claim 12
Dependent Claim
19 words
A cable structure according to claim 9, wherein said buffered optical fibers are stranded around an elongated central member.
Claim 13
Dependent Claim
19 words
A cable structure according to claim 10, wherein said sheathed optical fibers are stranded around an elongated central member.
Claim 14
Dependent Claim
34 words
A cable structure according to claim 9, wherein said buffered fibers are stranded, together with at least one elongated filling member made of a relatively high tensile strength material, around an elongated central member.
Claim 15
Dependent Claim
35 words
A cable structure according to claim 10, wherein said sheathed optical fibers are stranded, together with at least one elongated filling member made of a relatively high tensile strength material, around an elongated central member.
Claim 16
Dependent Claim
87 words
A cable structure according to claim 1, wherein said optical fiber cable is in the form of a plurality of optical fiber cable units stranded around an elongated central member, each optical fiber cable unit being composed of a plurality of buffered optical fibers stranded around an elongated central core and, laid therearound in the following order, a soft packing layer and a rigid packing layer, each buffered optical fiber comprising an optical element composed of a core and a clad and a buffer coating formed thereon.
Claim 17
Dependent Claim
94 words
A cable structure according to claim 1, wherein said optical fiber cable is in the form of a plurality of optical fiber cable units stranded around an elongated central member, each optical fiber cable unit being composed of a plurality of sheathed optical fibers stranded around an elongated central core and, laid therearound in the following order, a soft packing layer and a rigid packing layer, each sheathed optical fiber comprising an optical element composed of a core and a clad and, applied thereonto in the following order, a buffer coating and a sheath.
Claim 18
Dependent Claim
48 words
A cable structure according to any one of claims 9 to 16, wherein said optical fiber cable has, on its periphery, recesses formed by the stranding, each recess being filled with a corresponding portion of the soft packing layer positioned in close contact with said optical fiber cable.
References Cited (Backward Citations)
FR2239742A1
Cited
GB1457808A
Cited
FR2265103A1
Cited
JPS5145291A
Cited
US4359598A
Cited
US4416508A
Cited
US4272155A
Cited
US4392714A
Cited
US4375313A
Cited
US4541686A
Cited
US4515435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |