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US 11,152,138 B2Granted
Fire rated radio frequency cable
OwnerAsaad Elsaadani, Mihirraj Joshi +4inventors
InventorsAsaad Elsaadani, Mihirraj Joshi, Joel Cacopardo, Erhard Mahlandt, Thomas McKeon, Yin-Shing Chong
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Abstract
A coaxial cable (10) includes an outer barrier (12, 14, 16) that seals the coaxial cable from air and protects the cable's conductors (18, 20) form oxidation in a fire. Such an outer protective barrier may include a fire retardant tape. A dielectric (22) separates the conductors and may comprise a ceramic (23) embedded in a dielectric material (25), or ceramic beads in a braided ceramic mesh.
Claims22
A coaxial cable, comprising:
- an inner conductor;
- an outer conductor annularly arranged around the inner conductor;
- a dielectric separator arranged around at least a portion of the inner conductor so as to hold the outer conductor substantially separate from the inner conductor, wherein the dielectric separator comprises ceramic beads;
- and
- a tape layer including at least one layer of tape annularly arranged around the outer conductor, wherein the tape layer prevents the entry of air into the cable in the event of fire.
2 more elements
A coaxial cable, comprising:
- an inner conductor;
- an outer conductor annularly arranged around the inner conductor;
- a dielectric separator arranged around at least a portion of the inner conductor so as to hold the outer conductor substantially separate from the inner conductor;
- and
- a tape layer including at least a first tape layer and a second tape layer, the first tape layer and second tape layer being annularly arranged around the outer conductor
- wherein the first tape layer is comprised of at least one of the group consisting of:
- woven glass and a mica tape;
- and
- the second tape layer is a metal layer adjacent to and wrapped around the first tape layer, wherein the second tape layer partly overlaps itself and self-bonds in presence of heating in a fire to thereby seal itself so as to prevent the entry of air into the cable.
6 more elements
A coaxial cable, comprising:
- an inner conductor;
- an outer conductor annularly arranged around the inner conductor, wherein the outer conductor is formed of copper clad stainless steel and arranged such that the copper is facing the inner conductor;
- a dielectric separator arranged around at least a portion of the inner conductor so as to hold the outer conductor substantially separate from the inner conductor;
- and
- a tape layer including at least one layer of tape annularly arranged around the outer conductor adjacent to its stainless steel, wherein the tape layer is comprised of a layer of material adjacent to the outer conductor that is at least one of the group consisting of:
- woven glass and a mica tape;
- and
- wherein the tape layer prevents the entry of air into the cable in the event of fire.
5 more elements
Dependencies are inferred from the claim text.