US5133034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communications cable having a strength member system disposed between two layers of waterblocking material
Assignee: Furukawa Electric North America Inc
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Filing: 1991-08-20
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Granted: 1992-07-21
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Expires: 2011-08-20
Abstract
Abstract An optical fiber cable (20) which is particularly suited for shipboard use includes a core (22) and a sheath system (30). The core includes a plurality of optical fiber cable components (24,24) each including a buffered fiber (26) and high strength aramid yarn (27). About the four optical fiber cable components which are arranged about a central organizer (25) is a waterblocking-strength member system (32) which includes at least two spaced layers (33,33) each comprising a superabsorbent material. A strength member layer (40) is disposed between each two adjacent superabsorbent layers. An outer jacket (34) comprises a plastic material which in a preferred embodiment includes a low halogen, fire-resistant material.
Inventors
- 👤 Candido J. Arroyo
- 👤 Jill B. Fluevog
- 👤 Krishnaswamy Kathiresan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:23
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/44384; G02B6/4415; G02B6/4436
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
A communications cable, which comprises: a core having a longitudinal axis and comprising at least one communications medium; a jacket which comprises a plastic material and which encloses said core: a waterblocking system which is disposed between said core and said jacket, said waterblocking system comprising at least two concentric adjacent layers of waterblocking materials each being effective to inhibit the flow of water longitudinally along the cable; and a relatively supple yarn-like strength member system which is interposed between each two adjacent layers of said waterblocking system and which is in contact with at least one surface of each of the adjacent layers of the waterblocking system.
Claim 2
Dependent Claim
108 words
A communications cable, which comprises: a core having a longitudinal axis and comprising at least one communications medium; a jacket which comprises a plastic material and which encloses said core: a waterblocking system which is disposed between said core and said jacket, said waterblocking system comprising at least two concentric adjacent layers of waterblocking materials each being effective to inhibit the flow of water longitudinally along the cable; and a relatively supple yarn-like strength member system which is interposed between each two adjacent layers of said waterblocking system and which is in contact with at least one surface of each of the adjacent layers of the waterblocking system.
Claim 3
Dependent Claim
21 words
The cable of claim 1, wherein said relatively supple strength member system includes a fibrous material having a relatively high modulus.
Claim 4
Dependent Claim
24 words
The cable of claim 1, wherein each said waterblocking layer is a laminate comprising two longitudinally extending tapes with a superabsorbent powder disposed therebetween.
Claim 5
Dependent Claim
22 words
The cable of claim 1, wherein each said waterblocking layer comprises a substrate material which has been impregnated with a superabsorbent material.
Claim 6
Dependent Claim
40 words
The cable of claim 4, wherein said superabsorbent material is selected from the group consisting of (1) polyacrylic acid; (2) polyacrylamide; (3) blends of (1) and 2); (4) salts of (1) and (2); and (5) copolymers of (1) and (2).
Claim 7
Dependent Claim
30 words
The cable of claim 1, wherein at least one of said layers of said waterblocking system includes an outer layer of a superabsorbent material and a layer of acrylic fiber.
Claim 8
Dependent Claim
16 words
The cable of claim 1, wherein said core includes a centrally disposed, longitudinally extending waterblocking member.
Claim 9
Dependent Claim
35 words
The cable of claim 7, wherein said core comprises a plurality of optical fiber units which are disposed between said centrally disposed waterblocking member and an innermost one of said layers of said waterblocking system.
Claim 10
Dependent Claim
39 words
The cable of claim 8, which also includes a plurality of longitudinally extending members each made of a fibrous material and disposed between two adjacent optical fiber units and an innermost one of said layers of said waterblocking system.
Claim 11
Dependent Claim
24 words
The cable of claim 9, wherein each of said optical fiber units is stranded with a unidirectional lay about said centrally disposed waterblocking member.
Claim 12
Dependent Claim
25 words
The cable of claim 9, wherein each of said optical fiber units is stranded with a reverse oscillated lay about said centrally disposed waterblocking member.
Claim 13
Dependent Claim
31 words
The cable of claim 1, wherein said strength member system comprises yarn-like material which has been stranded with a unidirectional lay about an innermost one of said layers of waterblocking materials.
Claim 14
Dependent Claim
31 words
The cable of claim 1, wherein said strength member system comprises a yarn-like material which has been stranded with a reverse oscillated lay about one of said layers of waterblocking materials.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |