Motor Vehicle Hose

Abstract

A motor vehicle hose consisting of plastic material, where the interior surface of the hose consists at least in segments of an electrically conducting plastic material. The invention provides for a section of electrically conducting plastic material that extends at least over a portion of the circumference of the hose and which is connected to the electrically conducting interior surface of the hose. The section extends in a radial direction into a layer of non-conducting plastic material. The section extends at least in segments in the longitudinal direction of the hose.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a longitudinal cross sectional view of a motor vehicle hose with a flange;

FIG. 2 a is an enlarged section of the wall of the motor vehicle hose prior to the production of the flange

FIG. 2 b is an enlarged section of the wall of the motor vehicle hose after the production of the flange;

FIG. 3 is a cross section through a motor vehicle hose of the invention in a first embodiment; and

FIG. 4 is the object of FIG. 3 in a second embodiment.

Claims

1. A hose made of polymeric material having a wall with an interior surface defining a flow passage, said wall of said hose comprising: at least one layer of non-conductive polymeric material;at least one section of conductive polymeric material extending radially partially into said non-conductive polymeric material;said section of conductive polymeric material extending circumferentially only a portion of the circumference of said hose;and at least a segment of the interior surface of said hose defined by electrically conductive polymeric material.

2. A hose as claimed in claim 1 wherein said non-conductive layer and said section of conductive polymeric material define said interior surface of said hose.

3. A hose as claimed in claim 1 wherein said hose includes an interior layer of conductive polymeric material in contact with said non-conductive layer and said conductive layer defines said interior surface of said hose.

4. A hose as claimed in any one of claims 2 or 3 wherein said section of conductive polymeric material extends at least to the neutral fiber of said hose.

5. A hose as claimed in any one of claims 2 or 3 wherein said section of conductive polymeric material extends at least to the radial center of said wall of said hose.

6. A hose as claimed in any one of claims 2 or 3 wherein said section of conductive polymeric material extends longitudinally of said hose.

7. A hose as claimed in any one of claims 2 or 3 wherein said hose includes a flange formed therein and said section of conductive polymeric material extends past said flange.

8. A hose as claimed in any one of claims 2 or 3 wherein said hose includes a friction weld area from which a portion of the radial thickness of the hose is removed and said section of conductive polymeric material extends into said friction weld area and has a radial thickness that exceeds the radial thickness of said removed portion.

9. A hose as claimed in any one of claims 2 or 3 wherein said at least one section of conductive polymeric material extends from at least 40% to no more than 85% of the radial thickness of said at least one layer of non-conductive material.

10. A hose as claimed in any one of claims 2 or 3 wherein said at least one section of conductive polymeric material extends from between 5% to 30% of the circumference of said hose.

11. A hose as claimed in claim 3 wherein the radial thickness of said at least one section of conductive polymeric material is at least more than half the radial thickness of said layer of electrically conductive polymeric material and less than the radial thickness thereof.