US4820014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical cable
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-02-25
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Granted: 1989-04-11
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Expires: 2008-02-25
Abstract
Abstract A tape and slot type optical cable having a core with groove dimensions that hold tape shaped optical fibers and also improve the transmission and mechanical strength characteristics of the optical cable. The dimensions require that for a groove having a depth D S and a width W S and a predetermined plurality n of optical fiber bundles of thickness T and width W T that the equations following equations be satisfied: 1.2<(W.sub.S /W.sub.T)<1.45 1.3<(D.sub.S /nT)<1.55
Inventors
- 👤 Akira Nishimura
- 👤 Shuzo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:15
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/441; G02B6/4411; G02B6/4407; G02B6/4408
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
An optical cable comprising: a predetermined plurality n of tape-shaped optical fiber bundles having a thickness T and a width W T ; and at least one core having at least one groove therein, said groove having a width W S and a depth D S satisfying the equations: 1.2<(W.sub.S /W.sub.T)<1.45 1.3<(D.sub.S /nT)<1.55 said bundles being disposed in said groove.
Claim 2
Dependent Claim
60 words
An optical cable comprising: a predetermined plurality n of tape-shaped optical fiber bundles having a thickness T and a width W T ; and at least one core having at least one groove therein, said groove having a width W S and a depth D S satisfying the equations: 1.2<(W.sub.S /W.sub.T)<1.45 1.3<(D.sub.S /nT)<1.55 said bundles being disposed in said groove.
Claim 3
Dependent Claim
15 words
An optical cable according to claim 1 further including a tape which covers said core.
Claim 4
Dependent Claim
12 words
An optical cable according to claim 2 further including an outer sheath.
Claim 5
Dependent Claim
19 words
An optical cable according to claim 3 further including a tensile member disposed through the center of said core.
Claim 6
Dependent Claim
45 words
An optical cable according to claim 1 wherein said core has at least two grooves therein, said plurality of tape-shaped optical fiber bundles being disposed in one of said grooves, said cable further including a pair of stranded copper wires disposed in said other groove.
Claim 7
Dependent Claim
101 words
An optical cable comprising: a rod shaped tensile member; a predetermined plurality n of tape-shaped optical fiber bundles, each of said bundles having a thickness T and a width W T ; a plurality of cores, each core having at least one groove therein, said groove having a width W S and a depth D S satisfying the equations: 1.2<(W.sub.S /W.sub.T)<1.45 1.3<(D.sub.S /nT)<1.55 said bundles being disposed within each of said grooves; a tape wrapped around each core having said bundles in said grooves; and a sheath which covers all of said cores wrapped with said tape and said tensile member.
Claim 8
Dependent Claim
101 words
An optical cable comprising: a rod shaped tensile member; a predetermined plurality n of tape-shaped optical fiber bundles, each of said bundles having a thickness T and a width W T ; a plurality of cores, each core having at least one groove therein, said groove having a width W S and a depth D S satisfying the equations: 1.2<(W.sub.S /W.sub.T)<1.45 1.3<(D.sub.S /nT)<1.55 said bundles being disposed within each of said grooves; a tape wrapped around each core having said bundles in said grooves; and a sheath which covers all of said cores wrapped with said tape and said tensile member.
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |