Patent US3709159A successfully refreshed from Google Patents.
Patent US4703134A successfully refreshed from Google Patents.
US4703134A
Expired / Lapsed
US
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Water impervious rubber or plastic insulated power cable
Assignee: Furukawa Electric Co Ltd
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Filing: 1986-07-10
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Granted: 1987-10-27
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Expires: 2006-07-10
Abstract
Abstract In a water impervious rubber or plastic insulated power cable of the invention having a water impervious layer of a laminated tape comprising a metal foil and an electrically conductive plastic film formed directly around a cable core or through another coating layer, a hold tape layer having an excellent expanding property to follow a heat cycle of the power cable is formed on the water impervious layer.
Inventors
- 👤 Tadayuki Uematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:32
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/2825; H01B7/285; Y; Y02; Y02A; Y02A30/00; Y02A30/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
185 words
A water impervious rubber or plastic insulated power cable, comprising: a cable core; a water impervious layer formed around said cable core, said water impervious layer comprising a laminated tape which includes a metal foil and an electrically conductive plastic film; and a hold tape layer formed on said water impervious layer, said hold tape layer having an excellent expanding property to follow a heat cycle of the power cable; said hold tape layer comprising a tape comprising a synthetic resin fiber cloth and an electrically conductive rubber layer, said synthetic resin fiber cloth having a memory rate of expansion and contraction (A) of at least 30% in at least one of the transverse and longitudinal directions of said tape, said memory rate of expansion and contraction (A) being given by: A(%)=(a-b)/a×100 where, a=hank (mm) in the case of applying a load of 2/1000 gf×20 number per 1d of the indicated denier and another load of 1/10 gf×20 number per 1d of the indicated denier; and b=hank (mm) in the case of applying a load of 2/1000 gf×20 number per 1d of the indicated denier.
Claim 2
Dependent Claim
185 words
A water impervious rubber or plastic insulated power cable, comprising: a cable core; a water impervious layer formed around said cable core, said water impervious layer comprising a laminated tape which includes a metal foil and an electrically conductive plastic film; and a hold tape layer formed on said water impervious layer, said hold tape layer having an excellent expanding property to follow a heat cycle of the power cable; said hold tape layer comprising a tape comprising a synthetic resin fiber cloth and an electrically conductive rubber layer, said synthetic resin fiber cloth having a memory rate of expansion and contraction (A) of at least 30% in at least one of the transverse and longitudinal directions of said tape, said memory rate of expansion and contraction (A) being given by: A(%)=(a-b)/a×100 where, a=hank (mm) in the case of applying a load of 2/1000 gf×20 number per 1d of the indicated denier and another load of 1/10 gf×20 number per 1d of the indicated denier; and b=hank (mm) in the case of applying a load of 2/1000 gf×20 number per 1d of the indicated denier.
Claim 3
Dependent Claim
26 words
The water impervious power cable of claim 1, wherein said hold tape layer is in direct contact with said laminated tape of said water impervious layer.
Claim 4
Dependent Claim
80 words
The water impervious power cable of claim 1, wherein: said synthetic resin fiber cloth serves as a base cloth of said hold tape layer; said electrically conductive rubber layer of said hold tape layer is formed on said base cloth; and said base cloth is formed of woven filament yarn, at least part of said woven filament yarn having small crimps therein to impart said memory rate of expansion and contraction of at least 30% to said woven filament yarn.
Claim 5
Dependent Claim
78 words
The water impervious power cable of claim 1, wherein: said synthetic resin fiber cloth serves as a base cloth of said hold tape layer; said electrically conductive rubber layer of said hold tape layer is formed on said base cloth; and said base cloth is formed of a filament fiber, at least part of said filament fiber having small crimps therein to impart said memory rate of expansion and contraction of at least 30% to said filament fiber.
Claim 6
Dependent Claim
42 words
The water impervious power cable of claim 1, wherein said synthetic resin fiber cloth is made from a filament fiber, said filament fiber being a synthetic resin fiber selected from the group consisting of fiber of nylon, polyester, polybutylene-terephthalate, polyurethane, and polypropylene.
Claim 7
Dependent Claim
32 words
The water impervious power cable of claim 1, wherein said electrically conductive rubber layer of said hold tape layer is formed on at least one side of said synthetic resin fiber cloth.
Claim 8
Dependent Claim
42 words
The water impervious power cable of claim 1, wherein said synthetic resin fiber cloth is made from a filament yarn, said filament yarn being a synthetic resin fiber selected from the group consisting of fiber of nylon, polyester, polybutylene-terephthalate, polyurethane, and polypropylene.
Claim 9
Dependent Claim
58 words
The water impervious power cable of claim 1, wherein: said electrically conductive plastic film of said laminated tape of said water impervious layer comprises an electrically conductive polyolefin film; and said metal foil of said laminated tape of said water impervious layer comprises a foil of a metal selected from the group consisting of lead, copper and aluminum.
Claim 10
Dependent Claim
73 words
The water impervious power cable of claim 1, wherein: said electrically conductive plastic film of said laminated tape of said water impervious layer comprises an electrically conductive polyolefin film; and said metal foil of said laminated tape of said water impervious layer comprises a lead or lead alloy foil having a thickness of 20 to 200 μm; said electrically conductive polyolefin film being bonded on at least one side of said metal foil.
Claim 11
Dependent Claim
24 words
The water impervious power cable of claim 1, wherein said hold tape layer has a volume resistivity of not more than 5×10 6 Ω·cm.
Claim 12
Dependent Claim
32 words
The water impervious power cable of claim 1, wherein said cable core comprises an insulation layer comprised of a material selected from the group consisting of crosslinked polyethylene, polyethylene, and ethylene-propylene rubber.
Claim 13
Dependent Claim
30 words
The water impervious power cable of claim 1, wherein said cable core comprises a conductor shield and a rubber or plastic insulation layer which are sequentially formed around a conductor.
Claim 14
Dependent Claim
33 words
The water impervious power cable of claim 1, wherein said cable core comprises a conductor shield, a rubber or plastic insulation layer, and an insulation shield which are sequentially formed around a conductor.
Claim 15
Dependent Claim
19 words
The water impervious power cable of claim 1, further comprising a metal shield layer around said hold tape layer.
Claim 16
Dependent Claim
18 words
The water impervious power cable of claim 14, further comprising a jacket layer around said metal shield layer.
Claim 17
Dependent Claim
40 words
The water impervious power cable of claim 1, wherein said cable core comprises a watertight cable conductor, said watertight cable conductor comprising a plurality of stranded conductors, gaps between said stranded conductors being filled with an electrically conductive watertight compound.
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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) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |