US3760089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical bushing assembly having resilient means enclosed within sealing means
Assignee: ABB Inc USA
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Filing: 1972-04-27
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Granted: 1973-09-18
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Expires: 1992-04-27
Abstract
Abstract Mechanical stress-relieving means for high-voltage bushings. Resilient means is located between a first member attached to the bushing lead tube and a second member which is adjacent to the upper weather casing of the bushing. Different rates of thermal expansion of the bushing components are compensated for by the resilient means. Bushing dielectric seal between the first and second members is provided by either a gasket member or a semiflexible band.
Inventors
- 👤 J Hildenbrand
- 👤 L Wagenaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:48
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
An electrical bushing assembly comprising a lead tube, casing means including an upper casing member concentrically positioned around said lead tube, a substantially circular cap having an opening therein into which said lead tube extends, a substantially circular cup having a bottom with an opening therein and a flange extending outwardly from said cup, compressed coil springs each having first and second ends, the first ends of said coil springs being adjacent to said circular cap, the second ends of said coil springs being adjacent to the bottom of said circular cup, the flange of said circular cup extending between said circular cap and said upper casing member, and an O-ring positioned between the flange and said cup and said cap.
Claim 2
Dependent Claim
121 words
An electrical bushing assembly comprising a lead tube, casing means including an upper casing member concentrically positioned around said lead tube, a substantially circular cap having an opening therein into which said lead tube extends, a substantially circular cup having a bottom with an opening therein and a flange extending outwardly from said cup, compressed coil springs each having first and second ends, the first ends of said coil springs being adjacent to said circular cap, the second ends of said coil springs being adjacent to the bottom of said circular cup, the flange of said circular cup extending between said circular cap and said upper casing member, and an O-ring positioned between the flange and said cup and said cap.
Claim 3
Dependent Claim
131 words
An electrical bushing assembly comprising a lead tube, casing means including an upper casing member concentrically positioned around said lead tube, a substantially circular bushing support member, a telescoping member positioned with a portion thereof located between said bushing support member and said upper casing member, compressed coil springs each having first and second ends, the first ends of said coil springs being adjacent to said bushing support member, the second ends of said coil springs being adjacent to said sEcond telescoping member, a flexible metallic band having first and second edges, the first edge of said band being attached to the telescoping member and the second edge of said band being attached to said bushing support member, said flexible band being positioned substantially around the outside of said telescoping member.
Claim 4
Dependent Claim
131 words
An electrical bushing assembly comprising a lead tube, casing means including an upper casing member concentrically positioned around said lead tube, a substantially circular bushing support member, a telescoping member positioned with a portion thereof located between said bushing support member and said upper casing member, compressed coil springs each having first and second ends, the first ends of said coil springs being adjacent to said bushing support member, the second ends of said coil springs being adjacent to said sEcond telescoping member, a flexible metallic band having first and second edges, the first edge of said band being attached to the telescoping member and the second edge of said band being attached to said bushing support member, said flexible band being positioned substantially around the outside of said telescoping member.
Claim 5
Dependent Claim
43 words
The electrical bushing assembly of claim 2 wherein the telescoping member comprises a substantially circular channel having channel sides and a bottom portion, said channel sides having a sufficient separation distance to permit telescoping of said circular channel with the bushing support member.
Claim 6
Dependent Claim
38 words
The electrical bushing assembly of claim 2 wherein the telescoping member comprises a circular ring having inner and outer sides which form a slot therebetween, said slot having sufficient dimensions to permit telescoping with the bushing support member.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |