US4894490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High tension cable and method of manufacture thereof
Assignee: Sumitomo Wiring Systems Ltd
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Filing: 1987-12-28
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Granted: 1990-01-16
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Expires: 2007-12-28
Abstract
Abstract A method for the manufacture of a high tension ignition cable wherein a tension member is passed through an extruder to form a settable plastic layer thereon. This extrusion takes place under conditions such that substantially no setting of the plastic layer occurs. Thereafter, winding a resistive conductor around the plastic layer to form a plurality of coils at least partially embedded in the layer. The coils are then coated with an insulation layer and a plastic layer is caused to set, thereby fixing the coils in position so that they do not move. The cable made by the foregoing process is also described.
Inventors
- 👤 Terutsugu Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:34
CPC Classifications
H; H01; H01B; H01B13/00; H01B7/00; H01B7/0063; H01B13/28; H01B13/285
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
70 words
A method of making a cable comprising passing a tension member through an extruder to form a settable plastic layer thereon under conditions such that substantially no setting of said plastic layer occurs, thereafter, winding a wire around said plastic layer to form a plurality of coils at least partially embedded in said plastic layer, thereafter extruding an insulation layer over said coils, and causing said plastic layer to set.
Claim 2
Independent Claim
70 words
A method of making a cable comprising passing a tension member through an extruder to form a settable plastic layer thereon under conditions such that substantially no setting of said plastic layer occurs, thereafter, winding a wire around said plastic layer to form a plurality of coils at least partially embedded in said plastic layer, thereafter extruding an insulation layer over said coils, and causing said plastic layer to set.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein said insulating layer is settable, said extruding takes place without setting said insulating layer, and said causing also sets said insulating layer.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said wire is a resistive conductor.
Claim 5
Dependent Claim
24 words
The method of claim 1 wherein said winding takes place under sufficient tension to at least partially embed said conductor in said plastic layer.
Claim 6
Dependent Claim
14 words
The method of claim 1 further comprising covering said insulating layer with a braid.
Claim 7
Dependent Claim
14 words
The method of claim 5 wherein said braid is of organic and/or inorganic yarn.
Claim 8
Dependent Claim
14 words
The method of claim 5 further comprising applying an outer sheath to said braid.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein said tension member is yarn or strands of polymeric material.
Claim 10
Dependent Claim
17 words
The method of claim 1 wherein said plastic layer is caused to set by vulcanization and/or crosslinking.
Claim 11
Dependent Claim
20 words
The method of claim 1 wherein said plastic layer comprises a fluoro elastomer, a vulcanizing agent, and powdered ferromagnetic material.
Claim 12
Dependent Claim
35 words
The method of claim 10 wherein said plastic layer comprises, per 100 parts by weight of said elastomer, 200 to 600 parts by weight of ferrite powder and 0.5 to 3 parts of vulcanizing agent.
Claim 13
Dependent Claim
18 words
The method of claim 11 wherein there is also present 1 to 3 parts by weight of antioxidant.
Claim 14
Dependent Claim
14 words
The method of claim 1 wherein said conductor is Nichrome, Manganin and/or stainless steel.
Claim 15
Dependent Claim
26 words
The method of claim 1 wherein said insulation layer is a settable resin taken from the class consisting of polyethylene, ethylene propylene dienes, and silicone resins.
Claim 16
Dependent Claim
24 words
The method of claim 1 wherein said extruding of said insulation layer takes place under conditions which cause complete setting of said plastic layer.
Claim 17
Dependent Claim
14 words
The method of claim 1 wherein said cable is a high tension ignition cable.
Claim 18
Dependent Claim
12 words
A cable which is the product of the method of claim 1.
Claim 19
Dependent Claim
17 words
The method of claim 9 wherein said vulcanization takes place at elevated temperatures in a steam atmosphere.
Claim 20
Dependent Claim
16 words
The method of claim 1 wherein said wire is only partially embedded in said plastic layer.
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) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |