Patent US4529986A successfully refreshed from Google Patents.
US4332976A
Expired / Lapsed
US
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Coaxial cables
Assignee: Champlain Cable Corp
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Filing: 1980-06-05
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Granted: 1982-06-01
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Expires: 2000-06-05
Abstract
Abstract A dielectric system for coaxial electrical conductors is provided. The dielectric system separates an inner and outer conductor and is composed of a first layer of braided high tensile strength polymeric fluorocarbon filaments in an open weave surrounding the inner conductor. Surrounding the layer of braided filaments is a layer of cellular polyparabanic acid tape which is helically wound along the length of the cable with a negative overlap. Circumferentially surrounding these two layers along the length of the cable is a continuous layer of polymeric film which is in turn surrounded by a continuous layer of a crosslinkable polymeric lacquer.
Inventors
- 👤 Richard E. Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:26
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1834
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
A coaxial cable comprising: (a) an inner conductor; (b) a dielectric system comprising: (i) a first layer of braided high tensile strength polymeric fluorocarbon filaments surrounding said inner conductor in an open weave along the length of the inner conductor; (ii) a second layer of cellular polyparabanic acid tape surrounding circumferentially said first layer, said second layer being helically wound with a negative overlap along the length of the inner conductor so as to leave spaces between wraps of said tape about said first layer; (iii) a third layer circumferentially surrounding said second layer, said third layer comprising a high strength polymeric film that remains stable at temperatures up to 150° C. providing a continuous skin enclosing said first and second layers; and (iv) a fourth layer surrounding the third layer of polymeric film, said fourth layer comprising a crosslinked polymeric lacqurer; (c) an outer conductor being disposed coaxially and circumferentially about the dielectric system; and (d) an outer protective layer surrounding circumferentially said outer conductor.
Claim 2
Dependent Claim
166 words
A coaxial cable comprising: (a) an inner conductor; (b) a dielectric system comprising: (i) a first layer of braided high tensile strength polymeric fluorocarbon filaments surrounding said inner conductor in an open weave along the length of the inner conductor; (ii) a second layer of cellular polyparabanic acid tape surrounding circumferentially said first layer, said second layer being helically wound with a negative overlap along the length of the inner conductor so as to leave spaces between wraps of said tape about said first layer; (iii) a third layer circumferentially surrounding said second layer, said third layer comprising a high strength polymeric film that remains stable at temperatures up to 150° C. providing a continuous skin enclosing said first and second layers; and (iv) a fourth layer surrounding the third layer of polymeric film, said fourth layer comprising a crosslinked polymeric lacqurer; (c) an outer conductor being disposed coaxially and circumferentially about the dielectric system; and (d) an outer protective layer surrounding circumferentially said outer conductor.
Claim 3
Dependent Claim
37 words
A coaxial cable of claim 1 in which the negative overlap of said second layer leaves spaces of 30% to 60% of the width of said cellular polyparabanic acid tape along the length of the inner conductor.
Claim 4
Dependent Claim
29 words
A coaxial cable of claim 1 or 2 in which the third layer comprises a high strength polymeric film which remains stable at temperatures of up to 150° C.
Claim 5
Dependent Claim
20 words
A coaxial cable of claim 1 or 2 in which the third layer of polymeric film is polyparabanic acid film.
Claim 6
Dependent Claim
17 words
A coaxial cable of claim 1 or 2 in which the third layer is a polyimide film.
Claim 7
Dependent Claim
16 words
A coaxial cable of claim 1 or 2 in which the third layer is polyester film.
Claim 8
Dependent Claim
33 words
A coaxial cable of claim 1 or 2 in which the high strength polymeric fluorocarbon filaments have a tensile strength of at least 40,000 psi and a dielectric constant of less than 2.8.
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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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |