Patent US3639671A successfully refreshed from Google Patents.
US3639671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter arrangement in compressed-gas-insulated electrical conductors
Assignee: ABB Inc USA
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Filing: 1970-08-31
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Granted: 1972-02-01
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Expires: 1990-08-31
Abstract
Abstract A microporous filter is located within the hollow inner conductor of a high-voltage gas-insulated transmission system including two concentric conductors. The filter prevents metallic dust particles, which may be present in the conductors, from migrating through the system to prevent any reduction in the dielectric breakdown voltage level of the system.
Inventors
- 👤 Robert M Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:08
CPC Classifications
H; H02; H02G; H02G5/00; H02G5/06; H02G5/066
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A bus run comprising: an elongated hollow conductor; an elongated metallic enclosure surrounding said conductor and being airtightly sealed over its entire length; insulating spacer means arranged at spaced intervals within said enclosure and positioning and maintaining said conductor spaced from said enclosure; plural filter means positioned at spaced intervals within the hollow interior of said conductor to divide the interior region of said conductor into a plurality of sections; said conductor having openings at spaced intervals for communicating the region exterior of said conductor to the region interior of said conductor; the regions interior and exterior of said conductor containing an insulating gas free to migrate between said interior and exterior regions; each of said filter means being of a porosity so as to prevent particles which may be present within any section between adjacent filter means from migrating to an adjacent section while having a porosity sufficient to enable the insulating medium to move freely through any of said filter means.
Claim 2
Dependent Claim
163 words
A bus run comprising: an elongated hollow conductor; an elongated metallic enclosure surrounding said conductor and being airtightly sealed over its entire length; insulating spacer means arranged at spaced intervals within said enclosure and positioning and maintaining said conductor spaced from said enclosure; plural filter means positioned at spaced intervals within the hollow interior of said conductor to divide the interior region of said conductor into a plurality of sections; said conductor having openings at spaced intervals for communicating the region exterior of said conductor to the region interior of said conductor; the regions interior and exterior of said conductor containing an insulating gas free to migrate between said interior and exterior regions; each of said filter means being of a porosity so as to prevent particles which may be present within any section between adjacent filter means from migrating to an adjacent section while having a porosity sufficient to enable the insulating medium to move freely through any of said filter means.
Claim 3
Dependent Claim
41 words
The assembly of claim 1 wherein said filter means is comprised of a metallic microporous wafer having a porosity sufficient to permit passage of said insulating gas but insufficient to permit passage of particles between adjacent sections of the bus run.
Claim 4
Dependent Claim
46 words
The bus run of claim 1 wherein each of said filter means is comprised of a circular-shaped filter member mounted within the central opening of an annular shaped plug member; said plug member being positioned at a predetermined location within the interior of said hollow conductor.
Claim 5
Dependent Claim
11 words
The assembly of claim 1 wherein said compressed gas is sulphur-hexafluoride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |