Patent US3585278A successfully refreshed from Google Patents.
US3585278A
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Electrical bushings having insulating means including a cured elastomer containing mineral oil
Assignee: Westinghouse Electric Corp
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Filing: 1969-10-06
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Granted: 1971-06-15
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Expires: 1989-10-06
Abstract
Abstract An electrical bushing having insulating means surrounding an electrical conductor. At least a portion of the insulating means is formed of gelled transformer or mineral oil, held in solution by a thermoset elastomeric binder, which adheres tenaciously to the structural members of the bushing, and has excellent electrical insulating qualities. A method of constructing a bushing is also disclosed in which the thermosettable elastomeric material containing the mineral oil is disposed between a solid insulating body portion of a bushing formed of a synthetic resin, and a weather shed formed of porcelain, with the elastomeric material being cured to form a bond between the elastomeric material and the porcelain, and between the elastomeric material and the solid insulating body portion of the bushing.
Inventors
- 👤 James F Quirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:32
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/306
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
An electrical bushing comprising: an enclosure having first and second ends, and an opening which extends between its ends, said enclosure defining at least a portion of the outer surface of the electrical bushing, a conductor disposed through the opening in said enclosure, and insulating means disposed to surround a predetermined longitudinal dimension of said conductor, extending from said conductor to said enclosure, said insulating means including at least one circumferential layer of a cured elastomeric material which comprises a mixture of mineral oil, a binder, and cross-linking means for said binder, said binder being a carboxylic elastomer and said cross-linking means being an epoxide.
Claim 2
Dependent Claim
105 words
An electrical bushing comprising: an enclosure having first and second ends, and an opening which extends between its ends, said enclosure defining at least a portion of the outer surface of the electrical bushing, a conductor disposed through the opening in said enclosure, and insulating means disposed to surround a predetermined longitudinal dimension of said conductor, extending from said conductor to said enclosure, said insulating means including at least one circumferential layer of a cured elastomeric material which comprises a mixture of mineral oil, a binder, and cross-linking means for said binder, said binder being a carboxylic elastomer and said cross-linking means being an epoxide.
Claim 3
Dependent Claim
26 words
The electrical bushing of claim 1 wherein the mineral oil is in an amount ranging from 10 to 75 percent by weight of the elastomeric material.
Claim 4
Dependent Claim
102 words
An electrical bushing comprising: an enclosure having first and second ends, and an opening which extends between its ends, said enclosure defining at least a portion of the outer surface of the electrical bushing, a conductor disposed through the opening in said enclosure, and insulating means disposed to surround a predetermined longitudinal dimension of said conductor, extending from said conductor to said enclosure, said insulating means including at least one circumferential layer of a cured elastomeric material which comprises a mixture of mineral oil, a binder, and cross-linking means for said binder, said binder being an elastomer prepared from isobutylene and isoprene.
Claim 5
Dependent Claim
102 words
An electrical bushing comprising: an enclosure having first and second ends, and an opening which extends between its ends, said enclosure defining at least a portion of the outer surface of the electrical bushing, a conductor disposed through the opening in said enclosure, and insulating means disposed to surround a predetermined longitudinal dimension of said conductor, extending from said conductor to said enclosure, said insulating means including at least one circumferential layer of a cured elastomeric material which comprises a mixture of mineral oil, a binder, and cross-linking means for said binder, said binder being an elastomer prepared from isobutylene and isoprene.
Claim 6
Dependent Claim
26 words
The electrical bushing of claim 3 wherein the mineral oil is in an amount ranging from 10 to 60 percent by weight of the elastomeric material.
Claim 7
Dependent Claim
139 words
An electrical bushing comprising: an enclosure having first and second ends, and an opening which extends between its ends, said enclosure defining at least a portion of the outer surface of the electrical bushing, a conductor disposed through the opening in said enclosure, and insulating means disposed to surround a predetermined longitudinal dimension of said conductor, extending from said conductor to said enclosure, said insulating means including a solid body member formed of an epoxy resin and at least one circumferential layer of a cured elastomeric material which comprises a mixture of mineral oil, a binder, and cross-linking means for said binder, said elastomeric material being disposed between and bonded to the inner wall of the enclosure and the outer surface of said solid body member, said binder being a carboxylic elastomer, and the cross-linking means being an epoxide.
Claim 8
Dependent Claim
139 words
An electrical bushing comprising: an enclosure having first and second ends, and an opening which extends between its ends, said enclosure defining at least a portion of the outer surface of the electrical bushing, a conductor disposed through the opening in said enclosure, and insulating means disposed to surround a predetermined longitudinal dimension of said conductor, extending from said conductor to said enclosure, said insulating means including a solid body member formed of an epoxy resin and at least one circumferential layer of a cured elastomeric material which comprises a mixture of mineral oil, a binder, and cross-linking means for said binder, said elastomeric material being disposed between and bonded to the inner wall of the enclosure and the outer surface of said solid body member, said binder being a carboxylic elastomer, and the cross-linking means being an epoxide.
Claim 9
Dependent Claim
13 words
The electrical bushing of claim 5 wherein the enclosure is formed of porcelain.
Claim 10
Dependent Claim
132 words
An electrical bushing comprising: an enclosure having first and second ends, and an opening which extends between its ends, said enclosure defining at least a portion of the outer surface of the electrical bushing, a conductor disposed through the opening in said enclosure, and insulating means disposed to suRround a predetermined longitudinal dimension of said conductor, extending from said conductor to said enclosure, said insulating means including a solid body member and at least one circumferential layer of a cured elastomeric material which comprises a mixture of mineral oil, a binder, and cross-linking means for said binder, said elastomeric material the enclosure disposed between and bonded to the inner wall of the enclosure and the outer surface of said solid body member, said binder being an elastomer prepared from isobutylene and isoprene.
Claim 11
Dependent Claim
132 words
An electrical bushing comprising: an enclosure having first and second ends, and an opening which extends between its ends, said enclosure defining at least a portion of the outer surface of the electrical bushing, a conductor disposed through the opening in said enclosure, and insulating means disposed to suRround a predetermined longitudinal dimension of said conductor, extending from said conductor to said enclosure, said insulating means including a solid body member and at least one circumferential layer of a cured elastomeric material which comprises a mixture of mineral oil, a binder, and cross-linking means for said binder, said elastomeric material the enclosure disposed between and bonded to the inner wall of the enclosure and the outer surface of said solid body member, said binder being an elastomer prepared from isobutylene and isoprene.
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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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |