Patent US4538022A successfully refreshed from Google Patents.
US4538022A
Expired / Lapsed
US
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Flexible electric cable
Assignee: Siemens AG
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Filing: 1982-12-21
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Granted: 1985-08-27
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Expires: 2002-12-21
Abstract
Abstract In order to improve the mechanical strength of power and control cables which are subjected to high mechanical stresses in operation, the conductors are elastically fixed to a structural element of the cable. To this end, the conductor insulation is joined in a material-bonded manner to the structural element which consists of a soft elastomer. The conductors are provided, for instance, with a thin cover layer of polyethylene which can be cross-linked peroxidically and is cross-linked after the inner jacket is applied, and in the process makes a material-bonded connection to the inner jacket which consists of a vulcanizable mixture of ethylene-propylene rubber and natural rubber.
Inventors
- 👤 Max Barnicol-Ottler
- 👤 Martin Loczenski
- 👤 Norbert Mieschke
- 👤 Gerhard Ott
- 👤 Gerhard Przybylski
- 👤 Dietmar Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:10
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/18; H01B7/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
In a flexible electric multiconductor cable, comprising a core; insulated conductors twisted about the core in one or more layers; and a plastic or rubber jacket surrounding the insulated conductors, the improvement comprising: a structural element which extends over the entire length of the cable and consists, at least in a region adjacent to the outer surface of the insulated conductors, of a rubber-elastic material with a Shore-A hardness of at most 75; and each insulated conductor having the outer surface of its insulation joined in a material-bonded manner to said structure.
Claim 2
Dependent Claim
92 words
In a flexible electric multiconductor cable, comprising a core; insulated conductors twisted about the core in one or more layers; and a plastic or rubber jacket surrounding the insulated conductors, the improvement comprising: a structural element which extends over the entire length of the cable and consists, at least in a region adjacent to the outer surface of the insulated conductors, of a rubber-elastic material with a Shore-A hardness of at most 75; and each insulated conductor having the outer surface of its insulation joined in a material-bonded manner to said structure.
Claim 3
Dependent Claim
33 words
The improvement according to claim 1 wherein said jacket comprises an inner jacket disposed adjacent said conductors and an outer jacket surrounding said inner jacket and said structural element is the inner jacket.
Claim 4
Dependent Claim
27 words
The improvement according to claim 1 wherein two conductor layers are provided with an intermediate jacket between said layers and said structural element is said intermediate jacket.
Claim 5
Dependent Claim
18 words
The improvement according to claim 1 wherein said structural element is a dummy conductor arranged in the core.
Claim 6
Dependent Claim
33 words
The improvement according to claim 1, 2, 3, or 4 wherein said structural element is a cross-linkable or vulcanizable material selected from the group consisting of ethylene-propylene rubber, natural rubber and styrene-butadiene rubber.
Claim 7
Dependent Claim
62 words
The improvement according to claim 2, wherein the conductors are connected to the inner jacket in a material-bonded manner and said inner jacket is made from a vulcanizable mixture with an ethylene-propylene rubber base mixed with natural rubber and every conductor is coated with a thin cover layer of polyethylene which is cross-linkable peroxidically, said cover layer cross-linked to said inner jacket.
Claim 8
Dependent Claim
49 words
The improvement according to claim 2 wherein said inner jacket is made from a vulcanizable mixture with an ethylene-propylene rubber base mixed with natural rubber and every conductor is coated with a thin cover layer of polyethylene which is cross-linkable peroxidically, said cover layer cross-linked to said inner jacket.
Claim 9
Dependent Claim
24 words
The improvement according to claim 1, 2, 3 or 4 wherein a fusion-adhesive foil is arranged between each conductor and the rubber-elastic structural element.
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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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |