US5180884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielded wire and cable
Assignee: Champlain Cable Corp
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Filing: 1991-11-18
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Granted: 1993-01-19
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Expires: 2011-11-18
Abstract
Abstract The present invention features a shielded wire and cable article capable of meeting stringent aerospace specifications and requirements, particularly that of low weight. The article generally comprises an inner conductive core of one or more wires that can be bare or individually insulated, and that can be straight, twisted or braided within the core. The core can also comprise a multicore consisting of a plurality of core members. The conductive core is surrounded by one or more thin layer(s) of insulation about which the shielding of this invention is applied. The shielding comprises a braided or served mesh or woven yarn of metallically coated fibers, characterized by high tensile strength and flexibility. Where the fibers themselves are braided, the resulting mesh can be braided more tightly about the interior insulation surface than can conventional meshes. Also, the high tensile strength requirement for the yarn permits a thinner fiber to be utilized, wherein a greater shield weight reduction can be realized. This thinner metal coating greatly reduces the shielding weight of the shield mesh.
Inventors
- 👤 Mahmoud Aldissi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:49
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/02; H01B11/06; H01B11/10; H01B11/1033
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
119 words
A cable article having shielding against EMI and RFI, comprising: a conductive core member; at least one layer of insulation disposed over said conductive core member; a layer of shield material consisting of metallic coated aramid fibers that are served into a mesh to provide a protective shield layer disposed over the insulated conductive core member, said served mesh forming a shield layer that exceeds 96% coverage of said at least one layer of insulation and providing shielding effectiveness of at least approximately between 10 1 and 10 -3 ohms/meter of impedance across a frequency range of between 100 KHz and 1 GHz; and a jacket disposed over said protective shield layer comprising at least one layer of material.
Claim 2
Dependent Claim
119 words
A cable article having shielding against EMI and RFI, comprising: a conductive core member; at least one layer of insulation disposed over said conductive core member; a layer of shield material consisting of metallic coated aramid fibers that are served into a mesh to provide a protective shield layer disposed over the insulated conductive core member, said served mesh forming a shield layer that exceeds 96% coverage of said at least one layer of insulation and providing shielding effectiveness of at least approximately between 10 1 and 10 -3 ohms/meter of impedance across a frequency range of between 100 KHz and 1 GHz; and a jacket disposed over said protective shield layer comprising at least one layer of material.
Claim 3
Dependent Claim
18 words
The cable article in accordance with claim 1, wherein said protective shield layer comprises fibers coated with silver.
Claim 4
Dependent Claim
25 words
The cable article in accordance with claim 1, wherein said conductive core member comprises a plurality of metallic wires that are straight, served or twisted.
Claim 5
Dependent Claim
23 words
The cable article in accordance with claim 1, wherein said conductive core member comprises a plurality of metallic wires that ar individually insulated.
Claim 6
Dependent Claim
15 words
The cable article in accordance with claim 1, formed into a twin pair of cables.
Claim 7
Dependent Claim
17 words
The cable article in accordance with claim 1, wherein said conductive core member comprises a multicore member.
Claim 8
Dependent Claim
35 words
The cable article in accordance with claim 1, wherein said jacket is selected from at least one material from a group of materials consisting of: fluoropolymer; fluorocopolymer; polyimide; halogen-free insulation; and irradiated, cross-linked ethylene-tetrafluoroethylene polymer.
Claim 9
Dependent Claim
39 words
The cable article in accordance with claim 1, wherein said at least one insulation layer is selected from at least one material from a group of materials consisting of: fluoropolymer; fluorocopolymer; polyimide; halogen-free insulation; and irradiated, cross-linked ethylene-tetrafluoroethylene polymer.
Claim 10
Dependent Claim
27 words
The cable article of claim 1, wherein the aramid fibers are coated with a metal layer comprising approximately between 15% to 40% by weight of the fiber.
Claim 11
Dependent Claim
28 words
The cable article of claim 1, wherein said shield layer further comprises metal wires served with said aramid fibers to provide a combination mesh of wire and fiber.
Claim 12
Dependent Claim
118 words
A light weight cable article having shielding against EMI and RFI, comprising: a conductive core member; at least one layer of insulation disposed over said conductive core member; a layer of shield material consisting of metallic coated aramid fibers having a diameter of approximately between 50 and 10,000 denier, that are served into a mesh to provide a protective shield layer disposed over the insulated conductive core member and covering said insulated conductive core member in excess of approximately 96% to provide shielding effectiveness of at least approximately between 10 1 and 10 -3 ohms/meter of impedance across a frequency range of between 100 KHz and 1 GHz; and a jacket layer disposed over said protective shield layer.
Claim 13
Dependent Claim
118 words
A light weight cable article having shielding against EMI and RFI, comprising: a conductive core member; at least one layer of insulation disposed over said conductive core member; a layer of shield material consisting of metallic coated aramid fibers having a diameter of approximately between 50 and 10,000 denier, that are served into a mesh to provide a protective shield layer disposed over the insulated conductive core member and covering said insulated conductive core member in excess of approximately 96% to provide shielding effectiveness of at least approximately between 10 1 and 10 -3 ohms/meter of impedance across a frequency range of between 100 KHz and 1 GHz; and a jacket layer disposed over said protective shield layer.
Claim 14
Dependent Claim
18 words
The cable article in accordance with claim 11, wherein said protective shield layer comprises fibers coated with silver.
Claim 15
Dependent Claim
24 words
The cable article in accordance with claim 11, wherein said conductive core member comprises a plurality of metallic wires that are served or twisted.
Claim 16
Dependent Claim
27 words
The cable article of claim 11, wherein the aramid fibers are coated with a metal layer comprising approximately between 15% to 40% by weight of the fiber.
Claim 17
Dependent Claim
28 words
The cable article of claim 11, wherein said shield layer further comprises metal wires served with said aramid fibers to provide a combination mesh of wire and fiber.
References Cited (Backward Citations)
DE1019727B
Cited
GB999545A
Cited
DE2622297A1
Cited
JPS5340886A
Cited
US4301428A
Cited
US4408089A
Cited
US4506235A
Cited
US4684762A
Cited
DD244008A1
Cited
US4822950A
Cited
US4920233A
Cited
US4960965A
Cited
US5103067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-19 | 1996-07-20 | 1997-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-19 | 2000-07-20 | 2001-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-19 | 2004-07-20 | 2005-01-19 | $7700.00 | Window Closed / Lapsed |