US5034719A
Expired / Lapsed
US
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Radio frequency interference suppression ignition cable having a semiconductive polyolefin conductive core
Assignee: General Cable Industries Inc
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Filing: 1989-04-04
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Granted: 1991-07-23
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Expires: 2009-04-04
Abstract
Abstract An ignition cable having a layer of semi-conductive cross-linkable polyolefin extruded over a nonmetallic strength member to form a conductive core. An insulating layer is extruded over the conductive core and overlaid with a braid of glass yarn. A final layer of insulating material is applied over the braid of glass yarn to provide an external jacket. In an alternate embodiment, the braid of glass yarn is omitted.
Inventors
- 👤 Karl M. Brown
- 👤 Bruce D. Balcerski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:25
CPC Classifications
H; H01; H01B; H01B7/00; D; D04; D04C; D04C1/00; D04C1/06; D04C1/12; H01B7/0063
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
33 words
An ignition cable comprising: a nonmetallic fiber strength member; a concentric layer of a semi-conductive cross-linked polyolefin overcoating said strength member; and a concentric insulating layer overcoating said layer of semiconductive cross-linked polyolefin.
Claim 2
Dependent Claim
33 words
An ignition cable comprising: a nonmetallic fiber strength member; a concentric layer of a semi-conductive cross-linked polyolefin overcoating said strength member; and a concentric insulating layer overcoating said layer of semiconductive cross-linked polyolefin.
Claim 3
Dependent Claim
19 words
The ignition cable of claim 1 wherein said semi-conductive polyolefin has a volume resistivity between 1 and 40 ohms-centermeter.
Claim 4
Dependent Claim
20 words
The ignition cable of claim 2 wherein said layer of semiconductive polyolefin has a resistance between 100 and 30,000 ohms/foot.
Claim 5
Dependent Claim
15 words
The ignition cable of claim 1 wherein said nonmetallic strength member is a glass roving.
Claim 6
Dependent Claim
12 words
The ignition cable of claim 4 wherein said glass roving is conductive.
Claim 7
Dependent Claim
26 words
The ignition cable of claim 5 wherein the combined resistance of said conductive glass roving and said semi-conductive polyolefin layer is between 100 and 30,000 ohms/foot.
Claim 8
Dependent Claim
16 words
The ignition cable of claim 1 wherein said nonmetallic strength member is a single non-conductive element.
Claim 9
Dependent Claim
14 words
The ignition cable of claim 1 having an insulating jacket overcoating said insulating layer.
Claim 10
Dependent Claim
19 words
The ignition cable of claim 8 having a braid of yarn intermediate said insulating layer and said insulating jacket.
Claim 11
Dependent Claim
63 words
An ignition cable comprising: a fiber roving forming a strength member; a layer of semi-conductive cross-linked polyolefin extruded over said fiber roving to form a conductive core having a resistance between 100 and 30,000 ohms/foot; a layer of insulating material extruded over said conductive polyolefin layer; a glass yarn braided over said insulating layer; and an insulator jacket overlaying said glass fiber braid.
Claim 12
Dependent Claim
63 words
An ignition cable comprising: a fiber roving forming a strength member; a layer of semi-conductive cross-linked polyolefin extruded over said fiber roving to form a conductive core having a resistance between 100 and 30,000 ohms/foot; a layer of insulating material extruded over said conductive polyolefin layer; a glass yarn braided over said insulating layer; and an insulator jacket overlaying said glass fiber braid.
Claim 13
Dependent Claim
19 words
The ignition cable of claim 10 wherein said semi-conductive polyolefin has a volume resistivity between 1 and 40 ohms-centermeter.
Claim 14
Dependent Claim
16 words
The ignition cable of claim 11 wherein said nonmetallic fiber roving is a conductive glass roving.
Claim 15
Dependent Claim
50 words
An ignition cable comprising: a nonmetallic fiber roving forming a strength member; a layer of semi-conductive cross-linked polyolefin having a volume resistivity between 1 and 40 ohms-centermeter extruded over said fiber roving; an insulating layer extruded over said layer of semi-conductive polyolefin; and an insulator jacket overlaying said insulating layer.
Claim 16
Dependent Claim
50 words
An ignition cable comprising: a nonmetallic fiber roving forming a strength member; a layer of semi-conductive cross-linked polyolefin having a volume resistivity between 1 and 40 ohms-centermeter extruded over said fiber roving; an insulating layer extruded over said layer of semi-conductive polyolefin; and an insulator jacket overlaying said insulating layer.
Claim 17
Dependent Claim
20 words
The ignition cable of claim 13 having a braid of glass yarn intermediate said insulating layer and said insulator jacket.
Claim 18
Independent Claim
47 words
A method for making an ignition cable comprising the steps of: extruding a layer of a semi-conductive cross-linkable polyolefin concentrically over a nonmetallic strength member; cross-linking said semi-conductive polyolefin layer by curing; and concentrically extruding a layer of an insulating material over said layer of semi-conducting polyolefin.
Claim 19
Independent Claim
47 words
A method for making an ignition cable comprising the steps of: extruding a layer of a semi-conductive cross-linkable polyolefin concentrically over a nonmetallic strength member; cross-linking said semi-conductive polyolefin layer by curing; and concentrically extruding a layer of an insulating material over said layer of semi-conducting polyolefin.
Claim 20
Dependent Claim
20 words
The method of claim 15 further including the step of over-coating said layer of insulating material with an insulator jacket.
Claim 21
Dependent Claim
28 words
The method of claim 15 further including the steps of braiding a glass yarn over said insulating layer and overcoating said braided glass yarn with an insulator jacket.
Claim 22
Dependent Claim
14 words
The method of claim 15 wherein said strength member is a non-metallic fiber roving.
Claim 23
Dependent Claim
15 words
The method of claim 18 wherein said nonmetallic fiber roving is a glass fiber roving.
Claim 24
Dependent Claim
15 words
The method of claim 18 wherein said nonmetallic fiber roving is an aramide fiber roving.
Claim 25
Dependent Claim
14 words
The method of claim 15 wherein said strength member is a single nonmetallic element.
Claim 26
Dependent Claim
15 words
The method of claim 18 wherein said nonmetallic fiber roving is a conductive fiber roving.
Claim 27
Dependent Claim
18 words
The method of claim 15 wherein said semi-conductive polyolefin has a volume resistivity of 1 to 40 ohms-centermeter.
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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) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |