US4589939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating multiple-conductor cables using coated insert means
Assignee: Tyco International Ltd Bermuda
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Filing: 1985-02-15
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Granted: 1986-05-20
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Expires: 2005-02-15
Abstract
Abstract The conductors of multi-conductor, medium voltage, power cables, at locations where the cable insulation has been removed, are insulated by positioning between the conductors or cores, an insert, at least the surface of which comprises a first void-filling material capable of forming a substantially void-free interface with each conductor, placing a second void-filling material over the conductors and recovering a dimensionally recoverable polymeric sleeve over the resulting assembly. The method is particularly useful to provide insulation between conductors of a joint between two multi-conductor, medium voltage power cables.
Inventors
- 👤 Manoochehr Mohebban
- 👤 Willem M. Versteegh
- 👤 Lester T. Toy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:58
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/10; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S428/00; Y10S428/91; Y10S428/913; Y10S439/00; Y10S439/932; Y10S439/933
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
104 words
A method of insulating the cores of a multiconductor, medium voltage power cable, at a location where the cable insulation is removed, said method comprising: (a) selecting an insert shaped such that when it is positioned between the conductors of the cable it lies between each of the conductors, at least the surface of said insert comprising a first void-filling material capable of forming a void-free interface with each conductor; (b) positioning the insert between the conductors such that it lies between each of the conductors; (c) positioning a dimensionally recoverable polymeric sleeve over the resulting assembly; and (d) causing the sleeve to recover.
Claim 2
Independent Claim
104 words
A method of insulating the cores of a multiconductor, medium voltage power cable, at a location where the cable insulation is removed, said method comprising: (a) selecting an insert shaped such that when it is positioned between the conductors of the cable it lies between each of the conductors, at least the surface of said insert comprising a first void-filling material capable of forming a void-free interface with each conductor; (b) positioning the insert between the conductors such that it lies between each of the conductors; (c) positioning a dimensionally recoverable polymeric sleeve over the resulting assembly; and (d) causing the sleeve to recover.
Claim 3
Dependent Claim
21 words
A method in accordance with claim 1, which further comprises the step of positioning a second void-filling material around the conductors.
Claim 4
Dependent Claim
29 words
A method in accordance with claim 2, wherein the second void-filling material is positioned by placing the void filling material over the conductors in the form of shaped profiles.
Claim 5
Dependent Claim
30 words
A method in accordance with claim 1, wherein the dimensionally recoverable sleeve is heat shrinkable and the step of causing the sleeve to recover comprises applying heat to the sleeve.
Claim 6
Dependent Claim
22 words
A method in accordance with claim 4, wherein the heat shrinkable sleeve comprises an inner elastomeric layer and an outer conductive layer.
Claim 7
Dependent Claim
21 words
A method in accordance with claim 1, which further comprises applying a stress grading material to areas of high electrical stress.
Claim 8
Dependent Claim
24 words
A method in accordance with claim 1, which further comprises applying an initial insulating layer around each of the connectors and adjacent conductor regions.
Claim 9
Dependent Claim
29 words
A method in accordance with claim 7, in which the initial insulating layer is applied by positioning dimensionally recoverable sleeves over the connector and causing the sleeve to recover.
Claim 10
Independent Claim
140 words
A method of insulating a joint between multiple-conductor, medium voltage power cables, each of said cables having at least three conductors each surrounded by a dielectric layer a portion of which has been removed to expose an end region of the conductor, the conductors of one cable being connected to the corresponding conductors of a second such cable, said method comprises: (a) selecting an insert shaped such that when it is positioned between the conductors of the cables it lies between each of the conductors, at least the surface of said insert comprising a first void-filling material capable of forming a void-free interface with each conductor; (b) positioning the insert between the conductors such that it lies between each of the conductors; (c) positioning a dimensionally recoverable polymeric sleeve over the resulting assembly; and (d) causing the sleeve to recover.
Claim 11
Independent Claim
140 words
A method of insulating a joint between multiple-conductor, medium voltage power cables, each of said cables having at least three conductors each surrounded by a dielectric layer a portion of which has been removed to expose an end region of the conductor, the conductors of one cable being connected to the corresponding conductors of a second such cable, said method comprises: (a) selecting an insert shaped such that when it is positioned between the conductors of the cables it lies between each of the conductors, at least the surface of said insert comprising a first void-filling material capable of forming a void-free interface with each conductor; (b) positioning the insert between the conductors such that it lies between each of the conductors; (c) positioning a dimensionally recoverable polymeric sleeve over the resulting assembly; and (d) causing the sleeve to recover.
Claim 12
Dependent Claim
21 words
A method in accordance with claim 9, which further comprises the step of positioning a second void-filling material around the conductors.
Claim 13
Dependent Claim
29 words
A method in accordance with claim 10, wherein the second void-filling material is positioned by placing the void filling material over the conductors in the form of shaped profiles.
Claim 14
Dependent Claim
30 words
A method in accordance with claim 9, wherein the dimensionally recoverable sleeve is heat shrinkable and the step of causing the sleeve to recover comprises applying heat to the sleeve.
Claim 15
Dependent Claim
22 words
A method in accordance with claim 12, wherein the heat shrinkable sleeve comprises an inner elastomeric layer and an outer conductive layer.
Claim 16
Dependent Claim
21 words
A method in accordance with claim 9, which further comprises applying a stress grading material to areas of high electrical stress.
Claim 17
Dependent Claim
24 words
A method in accordance with claim 9, which further comprises applying an initial insulating layer around each of the connectors and adjacent conductor regions.
Claim 18
Dependent Claim
29 words
A method in accordance with claim 15, in which the initial insulating layer is applied by positioning dimensionally recoverable sleeves over the connector and causing the sleeve to recover.
Claim 19
Dependent Claim
17 words
A method in accordance with claim 9, which further comprises positioning a liner over the recovered sleeve.
Claim 20
Dependent Claim
18 words
A method in accordance with claim 17, which further comprises applying an outer protective jacket over the joint.
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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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |