Coaxial cable having a fluid stop therein and method for producing a coaxial cable which is impervious to the passage of air therethrough

Claim 2

A process for rendering a coaxial cable internally moisture impervious, said cable having an inner conductor and an outer conductor in braided form separated by an insulating layer, the steps comprising expanding a portion of said braided outer conductor to provide a hollow between said insulating layer and said outer conductor, injecting a permanently pliable insulating material into said hollow to completely fill said hollow, applying an elastic clamp about at least part of said expanded portion of said braided outer conductor, and enclosing the entire expanded portion of said outer conductor with a molded resin.

Claim 3

A process as defined in claim 1 wherein said elastic clamp is positioned approximately at the center of said hollow and restricts the size of the hollow at that point so that said hollow includes respective expanded portions on either side of said clamp.

Claim 4

A process as defined in claim 1 wherein said clamp is a ring made from elastic material.

Claim 5

A process as defined in claim 1 wherein said clamp is formed from a pair of superimposed rings.

Claim 6

A process as defined in claim 1 wherein the portion of said braided outer conductor is expanded by manually pushing back the wires of the braid from the two sides toward the center of the zone to be expanded.

Claim 7

A process for rendering a coaxial cable internally moisture impervious, said cable having an inner conductor, an outer conductor in braided form, a first insulating layer separating said inner and outer conductors, and a second insulating layer surrounding said outer conductor, the steps comprising stripping said second insulating layer from said cable within a first zone, expanding a portion of said braided outer conductor within said first zone by manually pushing back the wires of the braid from the two sides toward the center of the zone, injecting a permanently pliable insulating material into the hollow formed by the expanded portion of said braided outer conductor so as to completely fill said hollow, applying an elastic clamp about at least part of said expanded portion of said braided outer conductor, and enclosing the entire first zone with a molded resin.

Claim 8

A process for rendering a coaxial cable internally moisture impervious, said cable having an inner conductor, an outer conductor in braided form, a first insulating layer separating said inner and outer conductors, and a second insulating layer surrounding said outer conductor, the steps comprising stripping said second insulating layer from said cable within a first zone, expanding a portion of said braided outer conductor within said first zone by manually pushing back the wires of the braid from the two sides toward the center of the zone, injecting a permanently pliable insulating material into the hollow formed by the expanded portion of said braided outer conductor so as to completely fill said hollow, applying an elastic clamp about at least part of said expanded portion of said braided outer conductor, and enclosing the entire first zone with a molded resin.

Claim 9

A process as defined in claim 6 wherein said cable additionally includes a third insulating layer and an outer armoring sheath surrounding said second insulating layer, and further including the step of stripping said armoring sheath and said third insulating layer in a second zone including said first zone, said molded resin enclosing said entire second zone.

Claim 10

A process as defined in claim 7 wherein said elastic clamp is positioned approximately at the center of said hollow and restricts the size of the hollow at that point so that said hollow includes respective expanded portions on either side of said clamp.

Claim 11

A process as defined in claim 7 wherein said clamp is a ring made from elastic material.

Claim 12

A process as defined in claim 7 wherein said clamp is formed from a pair of superimposed rings.

Claim 13

A coaxial cable which is internally moisture impervious, comprising an inner conductor, an outer conductor in braided form, an insulating layer separating said inner and outer conductors, a portion of said braided outer conductor being expanded to provide a hollow between said insulating layer and said outer conductor, a permanently pliable insulating material completely filling said hollow, an elastic clamp disposed about the expanded portion of said braided outer conductor so as to restrict a portion of said hollow, and a molded resin enclosing the entire expanded portion of said outer conductor.

Claim 14

A coaxial cable which is internally moisture impervious, comprising an inner conductor, an outer conductor in braided form, an insulating layer separating said inner and outer conductors, a portion of said braided outer conductor being expanded to provide a hollow between said insulating layer and said outer conductor, a permanently pliable insulating material completely filling said hollow, an elastic clamp disposed about the expanded portion of said braided outer conductor so as to restrict a portion of said hollow, and a molded resin enclosing the entire expanded portion of said outer conductor.

Claim 15

A coaxial cable as defined in claim 11 wherein said clamp is a ring made from elastic material.

Claim 16

A coaxial cable as defined in claim 11 wherein said clamp is formed from a pair of superimposEd rings.

Claim 17

A coaxial cable as defined in claim 11 wherein said pliable insulating material is made up of a mixture of polyethylene and polyisobutylene.

Claim 18

A coaxial cable as defined in claim 11 wherein said clamp is made of neoprene.