Patent US4861945A successfully refreshed from Google Patents.
US4861945A
Expired / Lapsed
US
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Yieldably extensible self-retracting shielded cable
Assignee: TE Connectivity Corp
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Filing: 1988-12-09
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Granted: 1989-08-29
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Expires: 2008-12-09
Abstract
Abstract A yieldably extensible, self-retracting cable comprises a flexible center conductor surrounded by a primary dielectric material with a flexible wire shield exterior thereof and a thermoplastic or thermosetting elastomeric outer jacket formed permanently in a helical shape. The primary dielectric insulation comprises materials such as polymeric fluorocarbon or irradiated polyethylene having an exceptionally low dielectric constant. The low dielectric constant is maintained despite the permanently coiled configuration of the cable by ensuring that the plasticizing or curing temperature of the jacket is less than the melting or other degradation temperature of the dielectric material, and by utilizing unbraided wire shielding comprising a pair of concentric layers of wire wound helically in mutually-opposite directions to avoid mechanical injury of the dielectric material.
Inventors
- 👤 Arthur G. Buck
- 👤 Ronald A. Olson
- 👤 Doris A. Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:19
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/06; H01B7/065
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A yieldably extensible, self-retracting cable comprising: electrical conductor; primary dielectric material (b) a flexible primary dielectric material surrounding said conductor, said dielectric material having a dielectric constant suitable for high frequency signal transmission and having a predetermined degradation temperature above which its electrical insulating capability is significantly decreased; (c) a flexible wire shield surrounding said primary dielectric material, said shield comprising at least a pair of concentric layers of electrically-conductive wire wound helically in mutually-opposite directions, one layer being exterior of the other; and (d) a dielectric jacket surrounding said wire shield, said dielectric jacket comprising a heat-settable elastomeric dielectric material permanently formed in a yield ably extensible helical shape which likewise forms said conductor, said primary dielectric material, and said wire shield in a yieldably extensible helical shape, said elastomeric dielectric material of said jacket having a setting temperature which is less than said degradation temperature of said primary dielectric material.
Claim 2
Dependent Claim
152 words
A yieldably extensible, self-retracting cable comprising: electrical conductor; primary dielectric material (b) a flexible primary dielectric material surrounding said conductor, said dielectric material having a dielectric constant suitable for high frequency signal transmission and having a predetermined degradation temperature above which its electrical insulating capability is significantly decreased; (c) a flexible wire shield surrounding said primary dielectric material, said shield comprising at least a pair of concentric layers of electrically-conductive wire wound helically in mutually-opposite directions, one layer being exterior of the other; and (d) a dielectric jacket surrounding said wire shield, said dielectric jacket comprising a heat-settable elastomeric dielectric material permanently formed in a yield ably extensible helical shape which likewise forms said conductor, said primary dielectric material, and said wire shield in a yieldably extensible helical shape, said elastomeric dielectric material of said jacket having a setting temperature which is less than said degradation temperature of said primary dielectric material.
Claim 3
Dependent Claim
24 words
The cable of claim 1 wherein said primary dielectric material is selected from the group consisting of polymeric fluorocarbon, irradiated polyethylene, and mixtures thereof.
Claim 4
Dependent Claim
23 words
The cable of claim 1 wherein said pair of concentric layers of electrically-conductive wire in said shield have substantially the same current-carrying capacities.
Claim 5
Dependent Claim
16 words
The cable of claim 1 wherein said wire shield is substantially free of any braided wire.
Claim 6
Dependent Claim
22 words
The cable of claim 1 wherein said primary dielectric material, shield and jacket have annular circular cross sections concentrically surrounding said conductor.
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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) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |