Patent US4440971A successfully refreshed from Google Patents.
US4440971A
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US
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Supersaturated vapor dielectrics
Assignee: Electric Power Research Institute
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Filing: 1982-05-24
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Granted: 1984-04-03
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Expires: 2002-05-24
Abstract
Abstract Disclosed is an apparatus which is resistant to electrical breakdown consisting of a chamber containing electrodes separated by dielectric gas supersaturated with the vapor from a dielectric liquid.
Inventors
- 👤 Ronald T. Harrold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:37
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/16; H01B3/18; H01B3/56; H02; H02B; H02B13/00; H02B13/02; H02B13/035; H02B13/055
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
38 words
Apparatus with high electrical breakdown strength comprising a chamber containing electrodes separated by a substantially droplet-free dielectric gas supersaturated with the vapors of a dielectric liquid, and means to effect said supersaturation without atomization of said dielectric liquid.
Claim 2
Dependent Claim
38 words
Apparatus with high electrical breakdown strength comprising a chamber containing electrodes separated by a substantially droplet-free dielectric gas supersaturated with the vapors of a dielectric liquid, and means to effect said supersaturation without atomization of said dielectric liquid.
Claim 3
Dependent Claim
41 words
Apparatus according to claim 1 wherein said dielectric gas is selected from the group consisting of electronegative gases, electropositive gases, and mixtures thereof, and said dielectric liquid is selected from the group consisting of chlorinated liquids, fluorinated liquids, and mixtures thereof.
Claim 4
Dependent Claim
18 words
Apparatus according to claim 2 wherein said dielectric gas is a mixture of sulfur hexafluoride and a halocarbon.
Claim 5
Dependent Claim
12 words
Apparatus according to claim 2 wherein said dielectric liquid is a fluorocarbon.
Claim 6
Dependent Claim
12 words
Apparatus according to claim 1 wherein said supersaturation is at least 1.2.
Claim 7
Dependent Claim
16 words
A composition comprising a substantially droplet-free dielectric gas, supersaturated with vapors of an unatomized dielectric liquid.
Claim 8
Dependent Claim
16 words
A composition comprising a substantially droplet-free dielectric gas, supersaturated with vapors of an unatomized dielectric liquid.
Claim 9
Dependent Claim
42 words
A composition according to claim 6 wherein said dielectric gas is selected from the group consisting of electronegative gases, electropositive gases, and mixtures thereof, and said dielectric liquid is selected from the group consisting of chlorinated liquids, fluorinated liquids, and mixtures thereof.
Claim 10
Dependent Claim
19 words
A composition according to claim 6 wherein said dielectric gas is a mixture of sulfur hexafluoride and a halocarbon.
Claim 11
Dependent Claim
13 words
A composition according to claim 6 wherein said dielectric liquid is a fluorocarbon.
Claim 12
Independent Claim
30 words
A method of reducing electrical breakdown between electrodes comprising placing a composition which comprises a substantially droplet-free dielectric gas, supersaturated with vapors of an unatomized dielectric fluid between said electrodes.
Claim 13
Independent Claim
30 words
A method of reducing electrical breakdown between electrodes comprising placing a composition which comprises a substantially droplet-free dielectric gas, supersaturated with vapors of an unatomized dielectric fluid between said electrodes.
Claim 14
Dependent Claim
58 words
Apparatus according to claim 2 wherein said electronegative gases are selected from the group consisting of SF 6 , CCl 2 F 2 , C 2 F 6 , CF 3 CL, CF 4 , and mixtures thereof, and said electropositive gases are selected from the group consisting of N 2 , CO 2 , and mixtures thereof.
Claim 15
Dependent Claim
59 words
A composition according to claim 7 wherein said electronegative gases are selected from the group consisting of SF 6 , CCl 2 F 2 , C 2 F 6 , CF 3 Cl, CF 4 , and mixtures thereof, and said electropositive gases are selected from the group consisting of N 2 , CO 2 , and mixtures thereof.
References Cited (Backward Citations)
US4162227A
Cited
US4296003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |