Patent US4670814A successfully refreshed from Google Patents.
US4670814A
Expired / Lapsed
US
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High-tension capacitor
Assignee: Risho Kogyo Co Ltd
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Filing: 1985-11-12
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Granted: 1987-06-02
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Expires: 2005-11-12
Abstract
Abstract An improved high-tension capacitor is proposed which uses no insulation oil or gas. Not only the dielectric layers in the capacitor elements are impregnated with synthetic resin, but also the capacitor elements are insulated with synthetic resin by impregnating the insulation material around the capacitor elements with synthetic resin. The insulating layer around the capacitor elements is formed with a plurality of air ducts.
Inventors
- 👤 Goro Matsui
- 👤 Katsuyoshi Kiba
- 👤 Kiyoshi Terasaka
- 👤 Yuichi Aoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:41
CPC Classifications
H; H01; H01G; H01G2/00; H01G2/08; H01G2/12; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
147 words
A high-tension capacitor comprising: a plurality of capacitor elements extending parallel to and spaced from one another and each of which is comprised of alternating layers of electrode and dielectric each of which has a closed looped cross-section, said dielectric being impregnated with a synthetic resin; an insulating layer molded to and surrounding a substantial portion of the outer periphery of each of said plurality of capacitor elements for forming an integral high-tension capacitor comprised of said plurality of capacitor elements and said insulating layer, said insulating layer being of electrical insulating material impregnated with a synthetic resin; and said insulating layer having a plurality of air ducts extending therethrough, said air ducts each extending parallel to said plurality of capacitor elements and located between the outer peripheries of at least two of said capacitor elements for allowing air to pass therethrough to cool said capacitor elements.
Claim 2
Dependent Claim
147 words
A high-tension capacitor comprising: a plurality of capacitor elements extending parallel to and spaced from one another and each of which is comprised of alternating layers of electrode and dielectric each of which has a closed looped cross-section, said dielectric being impregnated with a synthetic resin; an insulating layer molded to and surrounding a substantial portion of the outer periphery of each of said plurality of capacitor elements for forming an integral high-tension capacitor comprised of said plurality of capacitor elements and said insulating layer, said insulating layer being of electrical insulating material impregnated with a synthetic resin; and said insulating layer having a plurality of air ducts extending therethrough, said air ducts each extending parallel to said plurality of capacitor elements and located between the outer peripheries of at least two of said capacitor elements for allowing air to pass therethrough to cool said capacitor elements.
Claim 3
Dependent Claim
24 words
A high-tension capacitor as claimed in claim 1 wherein, said air ducts are opened to portions of the outer periphery of said capacitor elements.
References Cited (Backward Citations)
US1511935A
Cited
US1816641A
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US2162475A
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US3331910A
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US3441816A
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US3454842A
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US3689811A
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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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |