Patent US3813475A successfully refreshed from Google Patents.
US3813475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grounded gas insulated bus enclosure-combined enclosure joint backup ring and contamination control device
Assignee: ABB Inc USA
•
Filing: 1973-05-21
•
Granted: 1974-05-28
•
Expires: 1993-05-21
Abstract
Abstract Gas (SF6) insulated bus systems having an outer grounded housing and an axial conductor wherein the outer housing section ends are supported in butt relation on an inner ring which also serves to position the insulator that supports the axial conductor; a butt weld may be formed between the housing ends over the ring. The butt weld and ring obviate the need for a friction fit of the housing ends within each other thereby reducing the scraping which creates impurities. The inner ring may have cylindrical extensions on each side spaced slightly from the inner wall of the housing to provide a tap which will receive and retain impurities that are created during construction or that may arise later - thereby reducing contamination of the insulating gas.
Inventors
- 👤 J Cronin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:43
CPC Classifications
H; H02; H02G; H02G5/00; H02G5/06; H02G5/066; H02G5/068; H02G5/063; H02G5/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
In a gas insulated bus having a grounded housing comprising a plurality of tubular sections connected end to end; and an axially mounted conductor; a connector for each adjacent tubular housing section; said connector comprising a cylindrical annular member, said annular member having a central circumferential projection having an outer diameter greater than that of the inner diameter of each adjacent tubular housing section; an annular extension on each side of said projection of said annular member; said annular extensions having a diameter substantially matching the inner diameter of said tubular housing sections; said annular extensions supporting and positioning said tubular housing sections; the end of each tubular housing section at said annular member extending up to and adjacent said projection of said annular member; an additional annular extension from at least one of said first mentioned annular extensions; said additional annular extension having an outer diameter less than that of the interior diameter of the tubular housing section and forming, with the adjacent tubular housing section, an annular pocket.
Claim 2
Dependent Claim
170 words
In a gas insulated bus having a grounded housing comprising a plurality of tubular sections connected end to end; and an axially mounted conductor; a connector for each adjacent tubular housing section; said connector comprising a cylindrical annular member, said annular member having a central circumferential projection having an outer diameter greater than that of the inner diameter of each adjacent tubular housing section; an annular extension on each side of said projection of said annular member; said annular extensions having a diameter substantially matching the inner diameter of said tubular housing sections; said annular extensions supporting and positioning said tubular housing sections; the end of each tubular housing section at said annular member extending up to and adjacent said projection of said annular member; an additional annular extension from at least one of said first mentioned annular extensions; said additional annular extension having an outer diameter less than that of the interior diameter of the tubular housing section and forming, with the adjacent tubular housing section, an annular pocket.
Claim 3
Dependent Claim
45 words
The gas insulated bus of claim 1 wherein the outer diameter of said projection of said annular member is less than the outer diameter of each adjacent tubular housing section; and a butt weld between the edges of said adjacent housing section over said projection.
Claim 4
Dependent Claim
21 words
The gas insulated bus of claim 2 wherein a sealing element extends between the adjacent tubular housing sections over said projection.
Claim 5
Dependent Claim
62 words
The gas insulated bus of claim 1, having a second additional annular extension from the other of said first mentioned annular extensions; said second additional annular extension having an outer diameter less than that of the interior diameter of the tubular housing section and forming, with the adjacent tubular housing section, an annular pocket on the other side of said annular member.
Claim 6
Dependent Claim
20 words
The gas insulated bus of claim 4, wherein the said pockets form a trap for impurities within the said housing.
Claim 7
Dependent Claim
53 words
The gas insulated bus of claim 1, wherein is provided an insulating member having a central opening; said axial conductor being supported in said central opening, a support for said insulating member; said support comprising means on the inner surface of said additional annular extension engageable with the edge of said insulating member.
Claim 8
Dependent Claim
56 words
The gas insulated bus of claim 1, wherein is provided a circular insulating member having a central opening; said axial conductor being supported in said central opening, a support for said circular insulating member; said support comprising means on the inner surface of said additional annular extension engageable with the edge of said circular insulating member.
Claim 9
Dependent Claim
34 words
The gas insulated bus of claim 1 wherein said additional extension has a plurality of slots therein each extending from the outer end thereof and lying substantially parallel to the axis of said housing.
Claim 10
Dependent Claim
31 words
The gas insulated bus of claim 8 wherein certain of said slots also extend into the first mentioned annular extension of said annular member to which said additional extension is connected.
References Cited (Backward Citations)
US2366579A
Cited
US3591703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |