US4840454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical cable and method of manufacturing
Assignee: Siemens AG
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Filing: 1987-08-17
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Granted: 1989-06-20
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Expires: 2007-08-17
Abstract
Abstract A light waveguide bundle is saturated with an adhering first filling compound and is then inserted into a cladding of an optical cable. The first filling compound is selected so that it guarantees the cohesion of the light waveguides forming the bundle and still allows individual light waveguides to be separated from the light waveguide bundle. The remianing space within the outer cladding is filled with a second filling compound, whose viscosity is significantly lower than the viscosity of the first filling compound used for the saturation of each of the light waveguide bundles.
Inventors
- 👤 Ernst Mayr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:43
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/4483
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
In an optical cable having an outer cladding containing at least one light waveguide bundle containing a plurality of light waveguides and a filling compound providing longitudinal tightness of the bundle in the cable, the improvements comprising each light waveguide bundle being saturated with an adhering, first filling compound which has a viscosity and still holds together the light waveguides of each light waveguide bundle and wherein the remaining space within the outer cladding being filled with a second filling compound having a viscosity that is lower than the viscosity of the first filling compound.
Claim 2
Dependent Claim
95 words
In an optical cable having an outer cladding containing at least one light waveguide bundle containing a plurality of light waveguides and a filling compound providing longitudinal tightness of the bundle in the cable, the improvements comprising each light waveguide bundle being saturated with an adhering, first filling compound which has a viscosity and still holds together the light waveguides of each light waveguide bundle and wherein the remaining space within the outer cladding being filled with a second filling compound having a viscosity that is lower than the viscosity of the first filling compound.
Claim 3
Dependent Claim
19 words
In an optical cable according to claim 1, wherein the first filling compound is composed of a cross-linking resin.
Claim 4
Dependent Claim
15 words
In an optical cable according to claim 2, wherein said resin is a silicone resin.
Claim 5
Dependent Claim
26 words
In an optical cable according to claim 1, wherein the first filling compound forms only an enveloping coating on the individual light waveguides of each bundle.
Claim 6
Dependent Claim
30 words
In an optical cable according to claim 4, wherein the first filling compound makes up, at most, 30% to 50% of the overall cross section of each light waveguide bundle.
Claim 7
Dependent Claim
31 words
In an optical cable according to claim 1, wherein the volume share of the first filling compound is selected to be lower than the volume share of the second filling compound.
Claim 8
Dependent Claim
33 words
In an optical cable according to claim 6, wherein the first filling compound has a volume share which is approximately 1/10-1/100 of the volume share of the second filling compound in the cable.
Claim 9
Dependent Claim
33 words
In an optical cable according to claim 1, wherein the second filling compound is thixotropic and is composed of a thixotropic material selected from a group consisting of thixotropic oil and thixotropic polyglycol.
Claim 10
Dependent Claim
20 words
In an optical cable according to claim 1, wherein the second filling compound is composed of an essentially cross-linked material.
Claim 11
Dependent Claim
30 words
In an optical cable according to claim 1, wherein the viscosity of the second filling compound is selected between 1/10 and 1/100 of the viscosity of the first filling compound.
Claim 12
Dependent Claim
25 words
In an optical cable according to claim 1, wherein the first filling compound is selected from a group consisting of silicone resins and polyurethane acrylics.
Claim 13
Dependent Claim
25 words
In an optical cable according to claim 11, wherein the second filling compound is selected from a group consisting of thixotropic oils and thixotropic polyglycol.
References Cited (Backward Citations)
CA1104394A
Cited
US4705571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |