US4748436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise prevention high voltage resistance wire
Assignee: Yazaki Corp
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Filing: 1987-05-21
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Granted: 1988-05-31
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Expires: 2007-05-21
Abstract
Abstract To reduce resistance change due to heat and external force, the noise prevention high-voltage resistance wire comprises a non-metallic reinforcing core wire; a conductive composite including gaseous phase growth carbon fiber, in particular; and at least one insulating layer. The gaseous phase growth carbon fiber is obtained by thermal decomposition of hydrocarbon compound with a catalyzer within a reducing atmosphere. Further, the conductive composite further comprises preferably conductive carbon powder such as conductive carbon black or graphite.
Inventors
- 👤 Yasuo Kanamori
- 👤 Masahiro Kanda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:10
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/0063; H01B1/00; H01B1/04; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
57 words
In a noise prevention high voltage resistance wire including: a non-metallic reinforcing core wire; a conductive composite including carbon conductive material and formed so as to cover said reinforcing core wire; and at least one insulating layer formed so as to cover said conductive composite, the improvement wherein said conductive composite includes gaseous phase growth carbon fiber.
Claim 2
Dependent Claim
57 words
In a noise prevention high voltage resistance wire including: a non-metallic reinforcing core wire; a conductive composite including carbon conductive material and formed so as to cover said reinforcing core wire; and at least one insulating layer formed so as to cover said conductive composite, the improvement wherein said conductive composite includes gaseous phase growth carbon fiber.
Claim 3
Dependent Claim
35 words
The noise prevention high voltage resistance wire as set forth in claim 1, wherein said gaseous phase growth carbon fiber is obtained by thermal decomposition of hydrocarbon compound with a catalyzer within a non-oxidizing atmosphere.
Claim 4
Dependent Claim
97 words
The noise prevention high voltage resistance wire as set forth in claim 2, wherein said gaseous phase growth carbon fiber is obtained in accordance with the following steps of: (a) placing a carrier substrate on which fine particles of one of transition metal and transition metal compound are attached as a catalyzer, within a mullite reaction tube arranged in a furnace; and (b) introducing a gas mixture of a carrier and hydrocarbon compound into the furnace at a temperature of 1000° to 1400° C. to grow carbon fiber by thermodecomposing the hydrocarbon in contact with the substrate.
Claim 5
Dependent Claim
81 words
The noise prevention high voltage resistance wire as set forth in claim 2, wherein said gaseous phase growth carbon fiber is obtained in accordance with the following steps of: (a) placing a substrate of ceramics including silicon within a mullite reaction tube arranged in a furnace; (b) introducing a gas mixture of a carrier, hydrocarbon compound and sulfur including substance at a temperature of 1200° to 1400° C. to grow carbon fiber by thermodecomposing the hydrocarbon in contact with the substrate.
Claim 6
Dependent Claim
30 words
The noise prevention high voltage resistance wire as set forth in claim 1, wherein said gaseous phase growth carbon fiber is 1 μm in diameter and several cm in length.
Claim 7
Dependent Claim
22 words
The noise prevention high voltage resistance wire as set forth in claim 1, wherein said conductive composite further comprises conductive carbon powder.
Claim 8
Dependent Claim
54 words
The noise prevention high voltage resistance wire as set forth in claim 6, wherein said conductive composite comprises: (a) base polymer of 100 weight proportion; and (b) carbon conductive material of 10 to 120 weight proportion including 30 to 90 wt.% gaseous phase growth carbon fiber and 10 to 70 wt.% conductive carbon powder.
Claim 9
Dependent Claim
23 words
The noise prevention high voltage resistance wire as set forth in claim 7, wherein said base polymer is a flexible high molecular compound.
Claim 10
Dependent Claim
22 words
The noise prevention high voltage resistance wire as set forth in claim 7, wherein said conductive carbon powder is conductive carbon black.
Claim 11
Dependent Claim
20 words
The noise prevention high voltage resistance wire as set forth in claim 7, wherein said conductive carbon powder is graphite.
Claim 12
Dependent Claim
26 words
The noise prevention high voltage resistance wire as set forth in claim 7, wherein said conductive carbon powder is 10 to 50 μm in particle diameter.
Claim 13
Dependent Claim
18 words
The noise prevention high voltage resistance wire as set forth in claim 7, which further comprises an antioxidant.
Claim 14
Dependent Claim
19 words
The noise prevention high voltage resistance wire as set forth in claim 7, which further comprises a crosslinking agent.
Claim 15
Dependent Claim
18 words
The noise prevention high voltage resistance wire as set forth in claim 7, which further comprises an assistant.
Claim 16
Dependent Claim
26 words
The noise prevention high voltage resistance wire as set forth in claim 1, wherein said conductive composite is extrusion coated around said non-metallic reinforcing core wire.
Claim 17
Dependent Claim
25 words
The noise prevention high voltage resistance wire as set forth in claim 1, wherein said conductive composite is dip-applied around said non-metallic reinforcing core wire.
References Cited (Backward Citations)
US3284751A
Cited
US3518606A
Cited
US3683309A
Cited
US3870987A
Cited
US4435692A
Cited
US4689601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |