US 2016/0105930 A1 · Voltage-Leveling Heater Cable

Abstract

A heater cable produces a substantially level voltage across its cross-section, providing a uniform and controllable thermal output along its length. The heater cable includes at least one center bus wire extending axially along a central axis of the heater cable, and at least one radial bus wire extending axially through the heating cable and positioned adjacent to the center bus wire. The heater cable further includes a thermally and electrically conductive interstitial material disposed around the at least one center bus wire and the at least one radial bus wire, and a jacket disposed about the interstitial material, the at least one center bus wire, and the at least one radial bus wire.

Claims20

Dependent claims

A heater cable comprising:

a center bus wire extending axially along the heater cable;
a first radial bus wire extending axially along the heating cable and positioned adjacent to the center bus wire;
a first cover encapsulating the first radial bus wire, the first cover comprising a first positive temperature coefficient (PTC) material;
and
a thermally and electrically conductive coating disposed on the first cover, the coating forming one or more electrical paths for an electric current carried by the center bus wire to be conducted to the first radial bus wire through the first cover with a substantially uniform distribution of the electric current within the first PTC material of the first cover;
the first PTC material having a substantially higher resistance than the center bus wire, the first radial bus wire, and the coating.

3 more elements

Dependencies are inferred from the claim text.

Voltage-Leveling Heater Cable

Life of this patent

Voltage-Leveling Heater Cable

Life of this patent

Abstract

Claims20