US3800065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grounded power cable
Assignee: Ericsson Inc
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Filing: 1973-03-26
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Granted: 1974-03-26
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Expires: 1993-03-26
Abstract
Abstract An economical parallel conductor grounded cable that can, if desire, be insulated in a single operation, has the grounding wire between the phase conductors but close to one flat surface of an extrusion of insulation. This extrusion is slotted from the other flat surface to a point close to the ground and is covered by a second, non-adhering, extrusion of uniform wall thickness.
Inventors
- 👤 S Bunish
- 👤 J Faulkner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:57
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/14; H01B7/00; H01B7/08; H01B7/0823
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
A cable comprising: A. first and second parallel power conductors, B. a first polymeric extrusion of electrical insulating composition directly encasing said power conductors, said first extrusion comprising two opposite flat surfaces and two opposite curvilinear surfaces, said power conductors being symmetrically spaced from said flat and said curvilinear surfaces, C. a solid grounding conductor, parallel to said power conductors, said grounding conductor being enclosed in said first extrusion, and said grounding conductor being centered between said curvilinear surfaces and close to one of said flat surfaces, D. walls defining a narrow slot in said first extrusion extending from the other of said flat surfaces to a point close to said grounding conductor, E. a second extrusion of abrasion resistant polymeric composition directly surrounding said first extrusion, said second extrusion being of substantially uniform wall thickness and said second extrusion being free from adhesion to said first extrusion.
Claim 2
Dependent Claim
148 words
A cable comprising: A. first and second parallel power conductors, B. a first polymeric extrusion of electrical insulating composition directly encasing said power conductors, said first extrusion comprising two opposite flat surfaces and two opposite curvilinear surfaces, said power conductors being symmetrically spaced from said flat and said curvilinear surfaces, C. a solid grounding conductor, parallel to said power conductors, said grounding conductor being enclosed in said first extrusion, and said grounding conductor being centered between said curvilinear surfaces and close to one of said flat surfaces, D. walls defining a narrow slot in said first extrusion extending from the other of said flat surfaces to a point close to said grounding conductor, E. a second extrusion of abrasion resistant polymeric composition directly surrounding said first extrusion, said second extrusion being of substantially uniform wall thickness and said second extrusion being free from adhesion to said first extrusion.
Claim 3
Dependent Claim
48 words
The cable of claim 1 wherein the thickness of said first extrusion between said flat surfaces is at least 150 mils and the thickness of said first extrusion at a point of one of said flat surfaces close to said grounding conductor is between five and 20 mils.
Claim 4
Dependent Claim
41 words
The cable of claim 1 wherein the thickness of said first extrusion between said flat surfaces is at least 150 mils and the thickness of said first extrusion between said slot and said grounding conductor is between five and 20 mils.
Claim 5
Dependent Claim
41 words
The cable of claim 2 wherein the thickness of said first extrusion between said flat surfaces is at least 150 mils and the thickness of said first extrusion between said slot and said grounding conductor is between five and 20 mils.
Claim 6
Dependent Claim
15 words
The cable of claim 1 comprising a longitudinal tape separator directly surrounding said grounding conductor.
Claim 7
Dependent Claim
15 words
The cable of claim 2 comprising a longitudinal tape separator directly surrounding said grounding conductor.
Claim 8
Dependent Claim
15 words
The cable of claim 3 comprising a longitudinal tape separator directly surrounding said grounding conductor.
Claim 9
Dependent Claim
15 words
The cable of claim 4 comprising a longitudinal tape separator directly surrounding said grounding conductor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |