Corrugated flexible pipe with a built-in electric cable

Abstract

A flexible corrugated pipe, of a type comprising a plurality of overlapping material layers, comprises at least a coiled wire, and at least an electric cable, the coils or turns of said at least a wire and said at least an electric cable being arranged on a same plane, inside the wall of the pipe.

Description

BRIEF DESCRIPTION OF THE DRAWING

The above mentioned aim and objects, as well as yet other objects, advantages and features of the invention will become more apparent hereinafter from the following disclosure of a preferred embodiment of the inventive pipe, which is shown, by a broken-away schematic exemplary view, in the sole figure of the accompanying drawing.

More specifically, the corrugated pipe according to the present invention comprises a flexible corrugated pipe, having an innermost layer or sub-layer made of a rubber material.

On said sub-layer 1 are overlapped, successively, a first layer 2 made of a pressure resistant fabric material, and a rubber layer

Said rubber layer 3 is furthermore overlapped by metal wire coils or turns 4 and 4b and the coils 5 of an electric cable 9 thereby providing, substantially at the same level as the pipe wall, wire turns or coils 4a, 4b and electric cable 9 coils 5 alternatively arranged.

The level or wall portion of the pipe thickness housing the above mentioned metal wire and electric cable 9 coils or turns, is then filled-in by a third rubber layer 6, in turn protected at first by a second fabric layer 7 and, finally, by an outer rubber covering layer 8.

The above disclosed arrangement of the electric cable 9 inside the pipe wall, at the same height or same level as the wires 4a, 4b, favors a formation of embossed corrugated patterns on the body of the pipe, with an increasing of the pipe flexibility with respect to an embodiment thereof providing the electric cable 9 arranged on a different layer.

Advantageously, according to the invention, the flexibility of resilient properties of the pipe can be further increased by including in said pipe a larger diameter electric cable adapted to be fitted to the pipe size.

The invention, as herein disclosed by way of a non limitative example, can be subjected to several variations and modifications, all of which will enter the scope of the accompanying claims.

Thus, for example, the pipe of the invention can be made starting from different materials, arrangements of the individual layers forming the pipe, while holding unaltered the mutual positions of the metal wire and electric cable turns, the coils of which are alternatively arranged at the same height or level of the pipe wall.

Furthermore, the pipe could also comprise a different number of metal wires (for example only one instead of two) which moreover can consists of coiled wires or threads made of any desired materials (for example a plastic material), provided that they are suitable for the intended application.

Claims

1. A corrugated flexible pipe, of a type comprising a plurality of overlapping material layers, and comprising at least a coiled wire and at least an electric cable, characterized in that said at least a coiled wire comprises a plurality of wire coils and said electric cable comprises a plurality of electric cable coils which coils are arranged on a same plane, inside the wall of said pipe.

2. A pipe according to claim 1, characterized in that the coils of said at least a wire are embedded in the wall of the pipe, and being alternately arranged with the corresponding coils of said electric cable.

3. A pipe according to claim 2, characterized in that said pipe comprises: a first inner layer or sub-layer;at least a fabric layer;a rubber layer arranged above said at least a fabric layer;a plurality of alternating coils of at least a wire and at least an electric cable;a filling-in rubber layer for filling-in the spaces between said coils; anda covering layer.

4. A pipe according to claim 1, characterized in that said at least an electric cable has a diameter larger than that of said at least a coiled wire.