Patent US4082026A successfully refreshed from Google Patents.
Patent US4246696A successfully refreshed from Google Patents.
US4246696A
Expired / Lapsed
US
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Process for manufacturing open-air compound insulators
Assignee: Ceramtec GmbH
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Filing: 1978-10-16
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Granted: 1981-01-27
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Expires: 1998-10-16
Abstract
Abstract Open-air compound insulators are made treating a prefabricated glass-filter rod with silane, extruding a rubber layer on the rod, strengthening the rubber layer and bonding prefabricated screens to the rubber layer by vulcanization.
Inventors
- 👤 Ewald Bauer
- 👤 Martin Kuhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:07
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/66; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/131; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5324; B29C66/53241; B29C66/70; B29C66/72; B29C66/721; B29C66/7212; H; H01; H01B; H01B17/00; H01B17/32; H01B19/00; B29C66/71; B29L; B29L2031/00; B29L2031/34; B29L2031/3412; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49227
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
47 words
A process for manufacturing a sparkover-safe, open air compound insulator consisting essentially of surface treating a prefabricated glass fiber rod with a silane, extruding a rubber layer on said treated rod, strengthening said rubber layer, assembling radially preexpanded prefabricated screens to said rod and vulcanizing said assembly.
Claim 2
Dependent Claim
47 words
A process for manufacturing a sparkover-safe, open air compound insulator consisting essentially of surface treating a prefabricated glass fiber rod with a silane, extruding a rubber layer on said treated rod, strengthening said rubber layer, assembling radially preexpanded prefabricated screens to said rod and vulcanizing said assembly.
Claim 3
Dependent Claim
48 words
Process according to claim 1, characterized in that to increase the adhesive power of the bonding by silanes, a dispersion of a solvent and a silicone rubber is applied prior to the extrusion to the surface of prefabricated glass fiber rod, and in that said surface is roughened.
Claim 4
Dependent Claim
31 words
Process according to claim 1, characterized in that the means used for strengthening the extruded layer comprises pyrogenically obtained silicic acid being present in said layer and aging said extruded layer.
Claim 5
Dependent Claim
41 words
Process according to claim 1, characterized in that the means used for strengthening said extruded rubber layer is at least two cross-linking agents having differential starting temperatures being present in said layer and subjecting said extruded layer to an elevated temperature.
Claim 6
Dependent Claim
19 words
Process according to claim 1 characterized in that fittings are attached to the ends of the glass fiber rod.
Claim 7
Dependent Claim
26 words
Compound insulator according to claim 7, characterized in that the thickness of extruded rubber layer on the fiber reinforced rod ranges from 1 to 10 mm.
Claim 8
Dependent Claim
50 words
Open-air compound insulator for use in external layer-endangered high-voltage installations having pollution limits rated at coating conductivities exceeding 40-micron layers characterized by a silane treated prefabricated glass fiber rod, a strengthened extruded rubber layer vulcanized on said rod, and a plurality of pre-expanded prefabricated screens vulcanized on said extruded layer.
Claim 9
Dependent Claim
50 words
Open-air compound insulator for use in external layer-endangered high-voltage installations having pollution limits rated at coating conductivities exceeding 40-micron layers characterized by a silane treated prefabricated glass fiber rod, a strengthened extruded rubber layer vulcanized on said rod, and a plurality of pre-expanded prefabricated screens vulcanized on said extruded layer.
Claim 10
Dependent Claim
20 words
Compound insulator according to claim 7, characterized in that rubber layer and screens are of the same material of construction.
Claim 11
Dependent Claim
21 words
Compound insulator according to claim 8 characterized in that said rubber and screens are made of a hot cross-linked silicone rubber.
Claim 12
Dependent Claim
51 words
Open-air compound insulator for use in areas having coating conductivities of less than 40-micron layers according to claim 7, characterized in that extruded rubber layer is present in a cross-linked state and at the screen and rubber layers joint is means of a slidable, electrically high-rated sealant material of paste-like consistency.
Claim 13
Dependent Claim
28 words
Compound insulator according to claim 10, characterized in that extruded rubber layer is a hot cross-linked silicone rubber and that said screens are manufactured from an ethylene-propylene rubber.
Claim 14
Dependent Claim
30 words
Compound insulator according to claim 10 characterized in that the joint-sealant material of paste-like consistency used in a vinyl group containing poly dimethylsiloxane, which is filled with high-dispersive silicic acid.
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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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |