US4970352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple core coaxial cable
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1989-03-14
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Granted: 1990-11-13
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Expires: 2009-03-14
Abstract
Abstract A multicore coaxial cable includes a conductor layer, an insulator layer surrounding the conductor layer, plastic tape surrounding the insulator and a metal shield surrounding the plastic tape. The exterior surface of the plastic tape is coated with a metal layer to contact the metal shield to reduce the electrostatic noises in the cable.
Inventors
- 👤 Kazuhiro Satoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 00:24
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/20; G; G01; G01R; G01R31/00; G01R31/50; G01R31/58; H01B11/1808; H01B11/1817
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A coaxial cable comprising: an electrical conductor; an insulator enclosing the conductor; a metal-coated plastic layer enclosing the insulator, the layer having an interior surface made of a non-metallic layer integrated with the insulator, and having an exterior surface made of a metallic layer not less than 0.2 μm thick; a metal shield enclosing the metal-coated plastic layer and contacting the exterior surface of the metal-coated plastic layer.
Claim 2
Dependent Claim
68 words
A coaxial cable comprising: an electrical conductor; an insulator enclosing the conductor; a metal-coated plastic layer enclosing the insulator, the layer having an interior surface made of a non-metallic layer integrated with the insulator, and having an exterior surface made of a metallic layer not less than 0.2 μm thick; a metal shield enclosing the metal-coated plastic layer and contacting the exterior surface of the metal-coated plastic layer.
Claim 3
Dependent Claim
70 words
A coaxial cable comprising: an electrical conductor; an insulator enclosing said conductor; a plastic tape having an exterior surface coated with a metal layer, said plastic tape being wound around and integrated with said insulator; and a metal shield enclosing said plastic tape so that said metal layer of said plastic tape comes into contact with said metal shield, said metal shield comprising a spiral covering about said plastic tape.
Claim 4
Dependent Claim
70 words
A coaxial cable comprising: an electrical conductor; an insulator enclosing said conductor; a plastic tape having an exterior surface coated with a metal layer, said plastic tape being wound around and integrated with said insulator; and a metal shield enclosing said plastic tape so that said metal layer of said plastic tape comes into contact with said metal shield, said metal shield comprising a spiral covering about said plastic tape.
Claim 5
Dependent Claim
23 words
A coaxial cable according to claim 2, wherein: the metal layer is an evaporation coated metal layer not less than 0.2 μm thick.
Claim 6
Dependent Claim
23 words
A coaxial cable according to claim 2, wherein: the metal layer is a sputtering coated metal layer not less than 0.2 μm thick.
Claim 7
Dependent Claim
89 words
A multi-core cable comprising: a plurality of coaxial shielded cables each including an electrical conductor; and a plurality of insulators enclosing said conductors in a one-to-one correspondence, a plurality of plastic tapes having exterior surfaces coated with metal layers not less than 0.2 μm thick and being wound around and integrated with said insulators in a one-to-one correspondence; and a plurality of metal shields enclosing said plastic tapes on a one-to-one correspondence so that said metal layers of said plastic tapes come into contact with said corresponding metal shields.
Claim 8
Dependent Claim
89 words
A multi-core cable comprising: a plurality of coaxial shielded cables each including an electrical conductor; and a plurality of insulators enclosing said conductors in a one-to-one correspondence, a plurality of plastic tapes having exterior surfaces coated with metal layers not less than 0.2 μm thick and being wound around and integrated with said insulators in a one-to-one correspondence; and a plurality of metal shields enclosing said plastic tapes on a one-to-one correspondence so that said metal layers of said plastic tapes come into contact with said corresponding metal shields.
Claim 9
Dependent Claim
23 words
A multicore cable according to claim 5, wherein: the metal layer is an evaporation coated metal layer not less than 0.2 μm thick.
Claim 10
Dependent Claim
23 words
A multicore cable according to claim 5, wherein: the metal layer is a sputtering coated metal layer not less than -.2 μm thick.
References Cited (Backward Citations)
US2019297A
Cited
US1922726A
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FR1267659A
Cited
GB570380A
Cited
DE2601608A1
Cited
US4358636A
Cited
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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) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |