US4454373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bushing for gas-insulated electrical equipment
Assignee: Mitsubishi Electric Corp
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Filing: 1982-11-17
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Granted: 1984-06-12
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Expires: 2002-11-17
Abstract
Abstract A bushing in which a conductor penetrates through the center of a porcelain tube of which the one end is closed, the other end of the porcelain tube is closed by a cone-shaped insulation spacer which protrudes into the porcelain tube and which also supports the conductor, a capacitor cone is disposed to surround the conductor and a predetermined portion of the insulation spacer in the porcelain tube, an insulating material is charged into the porcelain tube, the side opposite to the capacitor cone relative to the insulation spacer is coupled to a container which is filled with an insulating gas having a predetermined pressure and which accommodates electrical equipment, and the conductor is connected to the electrical equipment.
Inventors
- 👤 Mitsuhiro Kishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:14
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/36
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A bushing for gas-insulated electrical equipment comprising: a porcelain tube having one closed end; a central conductor which penetrates through the center of said porcelain tube; an insulation spacer having a conical shape protruding into said porcelain tube and closing the other end of said porcelain tube, and which supports said central conductor and increases the dielectric strength of said bushing; a cone-shaped capacitor which surrounds said insulation spacer and a portion of said central conductor; means, including an insulation spacer-mounting flange, for supporting said porcelain tube on the upper portion of a gas-insulated container which accommodates electric equipment to be connected to said central conductor; and an insulating material contained in said porcelain tube, surrounding said capacitor.
Claim 2
Dependent Claim
118 words
A bushing for gas-insulated electrical equipment comprising: a porcelain tube having one closed end; a central conductor which penetrates through the center of said porcelain tube; an insulation spacer having a conical shape protruding into said porcelain tube and closing the other end of said porcelain tube, and which supports said central conductor and increases the dielectric strength of said bushing; a cone-shaped capacitor which surrounds said insulation spacer and a portion of said central conductor; means, including an insulation spacer-mounting flange, for supporting said porcelain tube on the upper portion of a gas-insulated container which accommodates electric equipment to be connected to said central conductor; and an insulating material contained in said porcelain tube, surrounding said capacitor.
Claim 3
Dependent Claim
41 words
A bushing for gas-insulated electrical equipment according to claim 1, wherein said insulating material is a gas which is the same as the insulating gas in said gas-insulated container, and which has a pressure smaller than the gas in said container.
Claim 4
Dependent Claim
20 words
A bushing for gas-insulated electrical equipment according to claim 1, wherein said insulating material is an insulating substance having elasticity.
Claim 5
Dependent Claim
25 words
A bushing for gas-insulated electrical equipment according to claim 1, wherein said insulating material is an insulating substance which is composed of a foamed material.
References Cited (Backward Citations)
JPS5418720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |