US4704596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion coated ignition wire
Assignee: Essex Technology Inc
•
Filing: 1986-11-19
•
Granted: 1987-11-03
•
Expires: 2006-11-19
Abstract
Abstract Automotive ignition wire with a high temperature rating, excellent electrical insulating properties, heat resistance, oil resistance and abrasion resistance is described. The wire utilizes a conductor made up of a glass fiber-cotton fiber braid on a graphite impregnated glass layer. Overcoating the conductor is an adhesion promoting polymer layer, an extruded thermosetting semiconducting polymer layer overcoated with a glass braid layer and a polymer jacket material. The polymer jacket material comprises a polymeric mixture of ethylene vinyl acetate and ethylene-propylene-diene monomer stabilized with a mixture of a phenolic antioxidant and a metal salt antioxidant.
Inventors
- 👤 Ronald J. Coffey
- 👤 Christo M. Wassouf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:12
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/0063; H01B7/17; H01B7/29
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
Electrically conductive ignition wire comprising a graphite impregnated glass fiber core overbraided with a glass and cotton fiber braid, which is overcoated with an adhesion promoting polymer layer, an extruded layer of thermosetting semiconducting polymer, and a polymer jacket layer extruded over the thermosetting semiconducting polymer layer, the polymer jacket comprising a mixture of ethylene-propylene-diene monomer containing polymer with ethylene vinyl acetate stabilized with a mixture of a phenolic antioxidant and a metal salt antioxidant.
Claim 2
Dependent Claim
75 words
Electrically conductive ignition wire comprising a graphite impregnated glass fiber core overbraided with a glass and cotton fiber braid, which is overcoated with an adhesion promoting polymer layer, an extruded layer of thermosetting semiconducting polymer, and a polymer jacket layer extruded over the thermosetting semiconducting polymer layer, the polymer jacket comprising a mixture of ethylene-propylene-diene monomer containing polymer with ethylene vinyl acetate stabilized with a mixture of a phenolic antioxidant and a metal salt antioxidant.
Claim 3
Dependent Claim
45 words
The wire of claim 1 wherein the ethylene vinyl acetate polymer contains 40% by weight vinyl acetate and the antioxidant mixture is present in an amount of about 3.5% by weight and the weight ratio of phenolic antioxidant to metal salt antioxidant is about 1:2.
Claim 4
Dependent Claim
16 words
The wire of claim 2 wherein the thermosetting semiconducting polymer layer is a methyl vinyl silicone.
Claim 5
Independent Claim
82 words
The method of making electrically conductive ignition wire comprising overbrading a graphite impregnated glass fiber core with a glass and cotton fiber braid, overcoating the braid with an adhesion promoting polymer layer, extruding a layer of thermosetting semiconducting polymer on the adhesion promoting polymer layer, extruding a polymer jacket layer over the thermosetting semiconducting polymer layer, the polymer jacket comprising a mixture of ethylene-propylene-diene-monomer containing polymer with ethylene vinyl acetate stabilized with a mixture of phenolic antioxidant and a metal salt antioxidant.
Claim 6
Independent Claim
82 words
The method of making electrically conductive ignition wire comprising overbrading a graphite impregnated glass fiber core with a glass and cotton fiber braid, overcoating the braid with an adhesion promoting polymer layer, extruding a layer of thermosetting semiconducting polymer on the adhesion promoting polymer layer, extruding a polymer jacket layer over the thermosetting semiconducting polymer layer, the polymer jacket comprising a mixture of ethylene-propylene-diene-monomer containing polymer with ethylene vinyl acetate stabilized with a mixture of phenolic antioxidant and a metal salt antioxidant.
Claim 7
Dependent Claim
45 words
The method of claim 4 wherein the ethylene vinyl acetate polymer contains 40% by weight vinyl acetate and the antioxidant mixture is present in an amount of about 3.5% by weight and the weight ratio of phenolic antioxidant to metal salt antioxidant is about 1:2.
Claim 8
Dependent Claim
16 words
The method of claim 5 wherein the thermosetting semiconducting polymer layer is a methyl vinyl silicone.
References Cited (Backward Citations)
US3284751A
Cited
US3692925A
Cited
US3680027A
Cited
US3697670A
Cited
US3818412A
Cited
US3870987A
Cited
US4209425A
Cited
US4342880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |