US3569610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-propylene rubber insulated cable with cross-linked polyethylene strand shielding
Assignee: General Cable Corp
•
Filing: 1969-10-15
•
Granted: 1971-03-09
•
Expires: 1989-10-15
Abstract
Abstract A high-tension cable is made with a strand shield of crosslinked, conductive polyethylene compound and with insulation that is a proprietary compound of ethylene-propylene rubber. The insulation is approximately 48 percent ethylene-propylene amorphous copolymer; approximately 12 percent crystalline polyethylene homopolymer; and reinforcing fillers to provide adequate physical properties. The shield and insulation are extruded and cured simultaneously to obtain void-free bonding.
Inventors
- 👤 Oscar G Garner
- 👤 George S Eager Jr
- 👤 Louis A Bopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:28
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/14; H01B13/141; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/06; B29C48/25; B29C48/30; B29C48/304; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H01B7/00; H01B7/02; B29C48/05; B29K; B29K2101/00; B29K2101/10; B29K2105/00; B29K2105/06; B29K2105/20; B29K2301/00; B29K2301/10; B29L; B29L2031/00; B29L2031/34; B29L2031/3462; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49123
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
35 words
An electrical cable comprising a conductor, semiconducting polydetin shield on the conductor, and insulation surrounding the shield and said insulation comprising an ethylene-propylene rubber compound containing also a polyolefin that fusion bonds to the shield.
Claim 2
Dependent Claim
35 words
An electrical cable comprising a conductor, semiconducting polydetin shield on the conductor, and insulation surrounding the shield and said insulation comprising an ethylene-propylene rubber compound containing also a polyolefin that fusion bonds to the shield.
Claim 3
Dependent Claim
26 words
The electrical cable described in claim 1 characterized by the shield being polyethylene and the ethylene-propylene rubber compound containing polyethylene that fusion bonds to the shield.
Claim 4
Dependent Claim
26 words
The electrical cable described in claim 2 characterized by the ethylene-propylene copolymer of the insulation compound being amorphous and the polyethylene of the insulation being crystalline.
Claim 5
Dependent Claim
51 words
The electrical cable described in claim 1 characterized by the conductor being stranded, the shield being a smooth coating on the conductor, and the ethylene-propylene rubber compound being cured and bonded to the shield but free of radial pressure sufficient to force the shield into the interstices of the stranded conductor.
Claim 6
Dependent Claim
41 words
The electrical cable described in claim 3 characterized by the ethylene-propylene rubber compound containing approximately 20 to 80 percent by weight of ethylene-propylene copolymer and approximately 0 to 46 percent by weight of polyethylene, the balance being reinforcing and filler materials.
Claim 7
Dependent Claim
29 words
The electrical cable described in claim 5 characterized by the ethylene-propylene copolymer being approximately 48 percEnt of the insulation and the polyethylene being approximately 12 percent of the insulation.
Claim 8
Dependent Claim
34 words
The electrical cable described in claim 1 characterized by the conductor shield being a cross linked polyethylene having a higher softening point than that of the insulation before curing of the shield and insulation.
Claim 9
Dependent Claim
29 words
The electrical cable described in claim 1 characterized by both the shield and the insulation being circumferentially and longitudinally continuous layers extruded over the conductor and the shield, respectively.
Claim 10
Dependent Claim
40 words
The electrical cable described in claim 2 characterized by the materials for the shield and for the insulation being both formulated with a dicumyl peroxide curative system so that the shield and the insulation are cross linked to one another.
Claim 11
Dependent Claim
27 words
The electrical cable described in claim 2 characterized by an insulating shield of material from the group consisting of conducting cross linked polyethylene, conducting ethylene-propylene, and rubber.
References Cited (Backward Citations)
CA653518A
Cited
CA703930A
Cited
US2304210A
Cited
US3100136A
Cited
US3187071A
Cited
US3446883A
Cited
US3441660A
Cited
GB1150690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |