US4741594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical transmisson line and multiconductor flat cable incorporating same
Assignee: Junkosha Co Ltd
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Filing: 1984-10-02
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Granted: 1988-05-03
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Expires: 2004-10-02
Abstract
Abstract An optical transmission line is provided comprising an elongate light guide surrounded by a layer of a porous plastic, preferably expanded, porous polytetrafluoroethylene, and having at least one reinforcing strand, such as a wire, positioned outside of the porous plastic layer, this entire assembly encased in a resin sheath having a rectangular cross-section such that the light guide is positioned at the center of the cross-section of the resin sheath along the length of this transmission line. Multiconductor flat cable is provided by bonding a multiplicity of these optical transmission lines together. The transmission line is useful for transmitting optical energy signals.
Inventors
- 👤 Hirosuke Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:39
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/443; G02B6/4432; G02B6/4403; G02B6/4404; G02B6/4415; G02B6/4416
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
An optical signal transmission line comprising an elongate light guide surrounded along its length by a buffer layer of a porous plastic material, and having at least one elongate reinforcing strand positioned externally with respect to said buffer layer in substantially parallel relationship to said light guide, this assembly of light guide, buffer layer and reinforcing strand encased in a resin sheath having a rectangular cross-section, said light guide being positioned at the geometric center of said sheath along the length of said transmission line.
Claim 2
Dependent Claim
85 words
An optical signal transmission line comprising an elongate light guide surrounded along its length by a buffer layer of a porous plastic material, and having at least one elongate reinforcing strand positioned externally with respect to said buffer layer in substantially parallel relationship to said light guide, this assembly of light guide, buffer layer and reinforcing strand encased in a resin sheath having a rectangular cross-section, said light guide being positioned at the geometric center of said sheath along the length of said transmission line.
Claim 3
Dependent Claim
28 words
The transmission line of claim 1 having two reinforcing strands symetrically positioned within said sheath with respect to said light guide along the length of said transmission line.
Claim 4
Dependent Claim
32 words
The transmission line of claims 1 or 2 wherein said light guide and reinforcing strand or strands are arranged in a plane parallel to two opposite sides of said rectangular resin sheath.
Claim 5
Dependent Claim
14 words
The transmission line of claim 1 wherein said reinforcing strand is a metal wire.
Claim 6
Dependent Claim
17 words
The transmission line of claim 1 wherein said buffer layer is a layer of expanded, porous polytetrafluoroethylene.
Claim 7
Dependent Claim
17 words
The transmission line of claim 1 wherein said resin sheath is a sheath of a fluoroplastic resin.
Claim 8
Dependent Claim
44 words
The transmission line of claim 1, 2, 4, 5 or 6 wherein said light guide maintains a plane of polarization, and a positional relationship between said plane of polarization and said reinforcing strand or strands is fixed along the length of said transmission line.
Claim 9
Dependent Claim
22 words
A flat cable comprising a plurality of the transmission lines of claim 1 bonded together along the length of said transmission lines.
Claim 10
Dependent Claim
100 words
A flat cable comprising at least one transmission line of claim 1 bonded along its length to at least one electrical signal transmission line comprising at least one electrical signal conductor having a porous plastic cover and having at least one elongate reinforcing strand positioned externally with respect to said cover in substantially parallel relationship to said signal conductor, this assembly of signal conductor with cover and reinforcing strand encased in a resin sheath having a rectangular cross-section, said signal conductor being positioned at the geometric center of said resin sheath along the length of said electrical signal transmission line.
References Cited (Backward Citations)
US4468089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |