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US 5,210,377 AGranted
Coaxial electric signal cable having a composite porous insulation
AssigneeW. L. Gore & Associates, Inc.
InventorsFrancis A. Kennedy, William G. Hardie, Jack J. Hegenbarth
Life of this patent
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Abstract
A crush-resistant high signal propagation velocity coaxial cable insulated with a low-density expanded PTFE insulation surrounded by an extruded closed-cell polymer foam.
Claims15
A coaxial electric signal cable comprising from inside to outside:
- (a) an electrically conductive signal conductor;
- (b) a first layer of microporous insulation surrounding said conductor;
- and
- (c) a second layer of closed-cell polymer foam insulation surrounding said first layer of insulation.
1 more element
A process for preparing a coaxial electric signal cable comprising the steps:
- (a) enclosing an electrically conductive signal conductor with a first insulation layer of porous expanded polytetrafluoroethylene;
- (b) enclosing said first insulation layer with a second insulation comprising a closed-cell polymer foam;
- (c) enclosing said second insulation layer with a layer of electrically conductive metal shielding;
- (d) optionally positioning an electrically conductive drain wire adjacent to and in contact with said shielding;
- and
- (e) optionally enclosing said shielding layer with a protective polymeric jacket.
3 more elements
Dependencies are inferred from the claim text.