Insulated cable and method of making same
AssigneeRaychem Corporation
InventorsJohn L. Kemp, Alan S. Yeung
Life of this patent
Estimating the term…
Abstract
An insulated cable which combines good roundness and good strippability includes one or more insulated conductors, an inner lining of polymeric tape wrapped around the conductors, and an outer jacket of polymeric insulation melt extruded around the inner lining. The level of adhesion between the inner lining and the conductors is less than the level of adhesion between the inner lining and the outer jacket. The insulated cable is particularly useful in anti-lock braking systems. A process for making the cable is also disclosed.
Claims19
An insulated cable which comprises:
- (a) two or more conductors, at least two of said conductors being a metallic conductor which is individually surrounded by a first layer of polymeric insulation;
- (b) an inner lining of polymeric insulation which surrounds said two or more conductors collectively, and which comprises a polymeric tape wrapped around the conductors;
- and
- (c) an outer jacket of polymeric insulation comprising a polymeric composition which has been melt-extruded around the inner lining;
- the level of adhesion between the conductors and the inner lining being less than the level of adhesion between the inner lining and the outer jacket.
An insulated cable which has a roundness of at least 96% and which comprises
- (a) two insulated metallic conductors which are twisted together and each of which is surrounded by a first layer of polymeric insulation;
- (b) an inner lining of polymeric insulation which (i) surrounds but is not bonded to the insulated conductors, and (ii) comprises a polymeric tape wrapped around the conductors;
- and
- (c) an outer jacket of polymeric insulation which (i) comprises a polymeric composition which has been pressure-extruded around the inner lining and (ii) is bonded to the inner lining.
An assembly which comprises
- (1) a cable which has a roundness of at least 90% and which comprises
- (a) two insulated metallic conductors which are twisted together and each of which is surrounded by a first layer of polymeric insulation;
- (b) an inner lining of polymeric insulation which (i) surrounds but is not bonded to the insulated conductors, and (ii) comprises a polymeric tape wrapped around the conductors;
- and
- (c) an outer jacket of polymeric insulation which (i) comprises a polymeric composition which has been pressure-extruded around the inner lining and (ii) is bonded to the inner lining;
- and
- said cable having a terminal portion in which
- (i) the outer jacket and the inner lining have been removed to expose end portions of the insulated conductors,
- (ii) the first layer of insulation has been removed from part of each of the exposed end portions,
- (2) two terminals which are individually connected to the exposed end portions of the conductors;
- and
- (3) a molded body of an insulating polymeric composition which is molded around the terminal portion of the cable and the terminals and thus provides a water-impermeable seal around the terminal portion of the cable, the electrical connections between the cable and the sensor, and at least a part of each of the terminals.
A process for making an insulated cable which comprises:
- (1) providing two or more conductors, at least two of the conductors being a metallic conductor which is individually surrounded by a first layer of polymeric insulation;
- (2) wrapping a polymeric tape around the conductors;
- and
- (3) melt-extruding a polymeric composition around the polymeric tape to form an outer jacket, the composition being extruded at a temperature such that the outer jacket becomes melt-bonded to the polymeric tape.
Dependencies are inferred from the claim text.