US4383133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Above-ground conductor unit with corona noise reducing covering
Assignee: Pirelli and C SpA
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Filing: 1981-06-17
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Granted: 1983-05-10
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Expires: 2001-06-17
Abstract
Abstract An overhead conductor unit used for transmitting high voltage, alternating current, electrical energy which comprises one conductor or several metallic wires grouped together and a thin plastic cladding, a resin or resin-rubber, around the conductor or wires. The plastic cladding includes at least one conductive composition, generally, carbon black, in an amount of 5-40 parts by weight and at least one hydrorepellent composition present in 1-10 parts by weight. The thus obtained overhead conductor unit reduces, or prevents, corona noises when the unit becomes wet.
Inventors
- 👤 Attilio Lanfranconi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:53
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285; H01B5/00; H01B5/16; Y; Y02; Y02A; Y02A30/00; Y02A30/14; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/269; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/2933; Y10T428/294; Y10T428/296; Y10T428/2962
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A conductor unit for overhead lines for transmitting high voltage, alternating, electric current, said unit comprising one or more electric conductors and a thin, outermost, semi-conductive layer surrounding and in contact, at its inner surface, with the periphery of said conductor or of the plurality of conductors, said layer comprising a mixture of an insulating material, at least one conductive material in an amount of 5 to 40 parts by weight of the total weight of the mixture and at least one hydrorepellent material in an amount from 1 to 10 parts by weight of the total weight of the mixture, said unit having the characteristic that during rainfall or significant atmospheric humidity, corona noise is suppressed or is drastically reduced as compared to the same unit without a hydrorepellent material in the semi-conductive layer.
Claim 2
Dependent Claim
135 words
A conductor unit for overhead lines for transmitting high voltage, alternating, electric current, said unit comprising one or more electric conductors and a thin, outermost, semi-conductive layer surrounding and in contact, at its inner surface, with the periphery of said conductor or of the plurality of conductors, said layer comprising a mixture of an insulating material, at least one conductive material in an amount of 5 to 40 parts by weight of the total weight of the mixture and at least one hydrorepellent material in an amount from 1 to 10 parts by weight of the total weight of the mixture, said unit having the characteristic that during rainfall or significant atmospheric humidity, corona noise is suppressed or is drastically reduced as compared to the same unit without a hydrorepellent material in the semi-conductive layer.
Claim 3
Dependent Claim
16 words
A conductor unit as set forth in claim 1 wherein said conductive material is carbon black.
Claim 4
Dependent Claim
27 words
A conductor unit as set forth in claim 1 or 2 wherein the thickness of the semi-conductive layer is in the range from 1 to 3 millimeters.
Claim 5
Dependent Claim
17 words
A conductor unit as set forth in claim 1 or 2 wherein said hydrorepellent material is methyltrietoxysilan.
Claim 6
Dependent Claim
22 words
A conductor unit as set forth in claim 1 or 2 wherein said hydrorepellent material is methylpolysiloxanic resin 100% in powder form.
Claim 7
Dependent Claim
24 words
A conductor unit as set forth in claim 1 or 2 wherein said hydrorepellent material is dimethylpolysiloxan oil having a viscosity of 20 centistokes.
Claim 8
Dependent Claim
24 words
A conductor unit as set forth in claim 1 or 2 wherein said hydrorepellent material is dimethylpolysiloxan oil having a viscosity of 500,000 centistokes.
Claim 9
Dependent Claim
24 words
A conductor unit as set forth in claim 1 or 2 wherein said hydrorepellent material is dimethylpolysiloxan oil having a viscosity of 1,000,000 centistokes.
Claim 10
Dependent Claim
25 words
A conductor unit as set forth in claim 1 or 2 wherein said hydrorepellent material is polyethylene wax having a dropping point of 100°-200° C.
Claim 11
Dependent Claim
26 words
A conductor unit as set forth in claim 1 or 2 wherein said hydrorepellent material is a paraffinic mixture having a dropping point of 60°-80° C.
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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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |