US4660926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical cable
Assignee: Siemens AG
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Filing: 1984-10-03
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Granted: 1987-04-28
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Expires: 2004-10-03
Abstract
Abstract In an optical cable having a core which includes a high transverse pressure-resistant tube containing the optical waveguides and is concentrically surrounded by a support member characterized by the tube having an inner and outer layer with the inner layer consisting of aromatic polyamide and the outer layer consisting of polyester. Preferably, the outer support member includes aromatic polyamide fibers which are not saturated with resin.
Inventors
- 👤 Ernst Mayr
- 👤 Ulrich Oestreich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:28
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4422; G02B6/4427
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
84 words
In an optical cable having a central core including a tube containing optical waveguides and a concentric outer supporting member, said tube being a high transverse pressure-resistant tube, the improvements comprising said tube having a double wall with an inner layer and an outer layer, said inner layer being constructed of an extruded aromatic polyamide and the outer layer being constructed of an extruded polyester, said tube being filled with a soft filling compound and said optical waveguides being disposed in said filling compound.
Claim 2
Dependent Claim
84 words
In an optical cable having a central core including a tube containing optical waveguides and a concentric outer supporting member, said tube being a high transverse pressure-resistant tube, the improvements comprising said tube having a double wall with an inner layer and an outer layer, said inner layer being constructed of an extruded aromatic polyamide and the outer layer being constructed of an extruded polyester, said tube being filled with a soft filling compound and said optical waveguides being disposed in said filling compound.
Claim 3
Dependent Claim
25 words
In an optical cable according to claim 1, wherein the concentric outer supporting member consists of aromatic polyamide fibers which are not saturated with resin.
Claim 4
Dependent Claim
26 words
In an optical cable according to claim 2, wherein the aromatic polyamide fibers are disposed in a highly compressed state and are covered by a film.
Claim 5
Dependent Claim
15 words
In an optical cable according to claim 2, wherein said aromatic polyamide fibers are prestretched.
Claim 6
Dependent Claim
25 words
In an optical cable according to claim 4, wherein the aromatic polyamide fibers are held in a compressed state by an outer film wrapped thereon.
Claim 7
Dependent Claim
17 words
In an optical cable according to claim 1, wherein the filling compound is a partially cross-linked compound.
Claim 8
Dependent Claim
28 words
In an optical cable according to claim 6, wherein the waveguides are disposed in the tube in a spiral arrangement with an excess length of up to 1%.
Claim 9
Dependent Claim
20 words
In an optical cable according to claim 1, wherein the outer supporting member includes an outer cladding consisting of polypropylene.
Claim 10
Dependent Claim
42 words
In an optical cable according to claim 1, wherein the ratio of the wall thickness of the inner layer to the wall thickness of the outer layer of the tube is selected to lie in a range of between 1:1 and 3:1.
Claim 11
Dependent Claim
54 words
In an optical cable according to claim 1, wherein the outside diameter of the inner layer of the tube is selected to be in a range of 1.2 to 5 mm and the outside diameter of the outer layer of the tube is selected to be in a range between 2 to 9 mm.
Claim 12
Dependent Claim
26 words
In an optical cable according to claim 1, wherein the light waveguides are disposed in a spiral and have an excess length of up to 1%.
Claim 13
Dependent Claim
37 words
In an optical cable according to claim 1, wherein the outer support member includes at least one layer of aromatic polyamide fibers wrapped on the tube and free of resin and an outer covering consisting of polypropylene.
Claim 14
Dependent Claim
15 words
In an optical cable according to claim 12, wherein the aromatic polyamide fibers are prestretched.
Claim 15
Dependent Claim
96 words
In an optical cable having a central core including a tube containing optical waveguides and a concentric outer supporting member, said tube being a high transverse pressure-resistant tube, the improvements comprising said tube having a double wall with an inner layer and an outer layer, said inner layer being constructed of an aromatic polyamide and the outer layer being constructed of a polyester, a ratio of the wall thickness of the inner layer to the wall thickness of the outer layer of the tube being selected to lie in a range of between 1:1 and 3:1.
Claim 16
Dependent Claim
96 words
In an optical cable having a central core including a tube containing optical waveguides and a concentric outer supporting member, said tube being a high transverse pressure-resistant tube, the improvements comprising said tube having a double wall with an inner layer and an outer layer, said inner layer being constructed of an aromatic polyamide and the outer layer being constructed of a polyester, a ratio of the wall thickness of the inner layer to the wall thickness of the outer layer of the tube being selected to lie in a range of between 1:1 and 3:1.
Claim 17
Dependent Claim
104 words
In an optical cable having a central core including a tube containing optical waveguides and a concentric outer supporting member, said tube being a high transverse pressure-resistant tube, the improvements comprising said tube having a double wall with an inner layer and an outer layer, said inner layer being constructed of an aromatic polyamide and the outer layer being constructed of a polyester, the inner layer having an outside diameter being selected to lie in a range of between 1.2 to 5 mm and the outer layer having an outside diameter being selected to lie in a range of between 2 and 9 mm.
Claim 18
Dependent Claim
104 words
In an optical cable having a central core including a tube containing optical waveguides and a concentric outer supporting member, said tube being a high transverse pressure-resistant tube, the improvements comprising said tube having a double wall with an inner layer and an outer layer, said inner layer being constructed of an aromatic polyamide and the outer layer being constructed of a polyester, the inner layer having an outside diameter being selected to lie in a range of between 1.2 to 5 mm and the outer layer having an outside diameter being selected to lie in a range of between 2 and 9 mm.
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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) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |