US3767838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas insulated flexible high voltage cable
Assignee: ABB Inc USA
•
Filing: 1972-01-17
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Granted: 1973-10-23
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Expires: 1992-01-17
Abstract
Abstract A gas insulated flexible high voltage cable in which an annular conductor is positioned within an annular conductive enclosure. Spacer means position and maintain the conductor within the annular conductive enclosure. The spacer means comprises a plurality of gas permeable support layers of porous material, spaced one from another, and a plurality of perforated conductive layers alternately positioned between each pair of support layers. The spacer means is saturated by a volume of compressed insulating gas, such as sulfur hexafluoride.
Inventors
- 👤 Connell L Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:05
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/02; H01B7/0233; H01B9/00; H01B9/06; H01B9/0644; H01B9/0655
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
The gas insulated flexible high voltage cable of claim 1 including a gas under controlled positive pressure dispersed throughout said spacer means and adsorbed in said gas permeable support layers, said gas permeable support layers being in gas-transfer communication, one with another.
Claim 2
Dependent Claim
16 words
The gas insulated flexible high voltage cable of claim 2 wherein said gas is sulfur hexafluoride.
Claim 3
Dependent Claim
39 words
The gas insulated flexible high voltage cable of claim 1 wherein said porous material from which said gas permeable support layers are formed is selected from the group consisting of open cell flexible foam resins, cloth, paper and felt.
Claim 4
Dependent Claim
29 words
The gas insulated flexible high voltage cable of claim 1 wherein said annular conductor comprises an annular conductive housing; and a plurality of stranded conductors confined within said housing.
Claim 5
Dependent Claim
45 words
The gas insulated flexible high voltage cable of claim 1 wherein said annular conductive enclosure comprises a conductive inner jacket impervious to said gas; an outer jacket surrounding said conductive inner jacket; and conductive, non-magnetic banding between said conductive inner jacket and said outer jacket.
Claim 6
Dependent Claim
30 words
The gas insulated flexible high voltage cable of claim 1 wherein said porous material from which said gas permeable support layers are formed is an open cell flexible urethane foam.
Claim 7
Dependent Claim
47 words
The gas insulated flexible high voltage cable of claim 1 wherein the dielectric constant of the individual layers of said spacer means is varied such that it approaches 1.05 at the outermost layer thereof and approaches 2.0 at the innermost layer thereof proximate to said annular 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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |