EP0174424A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Water-blocked optical fiber cable
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1985-02-28
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Granted: —
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Expires: 2005-02-28
Abstract
Abstract A water-tight optical fiber cable constructed without the need of a viscous water-blocking compound. At least one water-absorbing fibrous braid (2) is placed adjacent each optical fiber (1) to absorb any water which may be present in or enter the cable. Additionally, one or more water-absorbing fibrous braids (2) may be disposed between a tape layer (4) and the surrounding protective sheath (5) of the cable.
Inventors
- 👤 Fumikiyo C/O Yokohama Works Of Sumitomo Uchioke
- 👤 Ichiro C/O Yokohama Works Of Sumitomo Ogasawara
- 👤 Shuzo C/O Yokohama Works Of Sumitomo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 17:59
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/44384; G02B6/4415; G02B6/4427
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
17 words
An optical fiber cable comprising: at least one optical fiber, and at least one water-absorbing fibrous braid.
Claim 2
Dependent Claim
17 words
An optical fiber cable comprising: at least one optical fiber, and at least one water-absorbing fibrous braid.
Claim 3
Dependent Claim
35 words
The optical fiber cable of claim 1, wherein said cable further comprises a central tension member, and wherein a plurality of said fibers are provided and are arranged around a periphery of said tension member.
Claim 4
Dependent Claim
25 words
The optical fiber cable of claim 2, wherein said at least one water-absorbing fibrous braid is arranged between each two adjacent ones of said fibers.
Claim 5
Dependent Claim
29 words
Tne optical fiber cable of claim 2, further comprising at least one string, said at least one water-absorbing fibrous braid being arranged between said optical fiber and said string.
Claim 6
Dependent Claim
25 words
The optical fiber cable of claim 4, wherein said at least one water-absorbing fibrous braid is arranged between each two adjacent ones of said strings.
Claim 7
Dependent Claim
24 words
The optical fiber cable of claim 2, further comprising further water-absorbing fibrous braids arranged around said fibers and said first mentioned water-absorbing fibrous braids.
Claim 8
Dependent Claim
26 words
The optical fiber cable of claim 1, wherein said cable further comprises a grooved spacer having a plurality of generally helically extending grooves arranged radially therein.
Claim 9
Dependent Claim
25 words
The optical fiber cable of claim 7, wherein at least one said optical fiber and one said-water-absorbing fibrous braid are disposed in each said groove.
Claim 10
Dependent Claim
24 words
9 . The optical fiber cable of claim 8, wherein only a single water absorbing fibrous braid is disposed in one of said groove.
Claim 11
Dependent Claim
31 words
The optical fiber cable of claim 1, wherein said cable further comprises a central tension member, and a plurality of U-shaped spacer tapes arranged around a periphery of said tension member.
Claim 12
Dependent Claim
30 words
ll. The optical fiber cable of claim 10, wherein at least one said optical fiber and one said water-absorbing fiborous braid are disposed in each of said U-shaped spacer tapes.
Claim 13
Dependent Claim
27 words
The optical fiber cable of claim 11, wherein only a single water absorbing fibrous braid is disposed between each two adjacent ones of said U-shaped spacer tapes.
Claim 14
Dependent Claim
39 words
The optical fiber cable of claim 12, further comprising a string disposed instead of the combination of said U-shaped tape, said fiber and said braid, said string being disposed between each two adjacent ones of said water-absorbing fibrous braids.
Claim 15
Dependent Claim
32 words
The optical fiber cable of claim 2, further comprsing a plurality of tubes, at least one said optical fiber and one said water-absorbing fibrous braid being disposed in each of said tube.
Claim 16
Dependent Claim
45 words
The optical fiber cable of any one of claims 1 through 14, wherein said cable further comprises a tape layer surrounding said optical fibers and a sheath surrounding said tape layer, and at least one water-absorbing fibrous-braid disposed between said tape layer and said sheath.
Claim 17
Dependent Claim
17 words
The optical fiber cable of claim 15, wherein said tape layer is a water absorbing fibrous tape.
Claim 18
Dependent Claim
53 words
The optical fiber cable of any..one of claims 1 through 14, wherein said water-absorbing fibrous braids are made of material having an ability to absorb water in an amount at least more than 10 times a volume thereof, and comprise at least one twisted fiber having a finecess of more than 200 denier.
References Cited (Backward Citations)
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