Continental Gummi-werke Aktiengesellschaft

Continental Aktiengesellschaft

Contitech Schlauch Gmbh

Anton Besche

Rolf Hecker

Klaus Schwarze

Jost Sterling

Hans-Jürgen Kuhn

The invention relates to a flexible hose line, in particular, a high-pressure hose line which is subjected to a pressurized forming process, preferably for variable levels of pressure. Said flexible hose line consists of several layers, at least one of which is configured as a reinforcing layer. The hose line is characterised by an inner layer ( ) with a profile which can be elastically stressed in at least the longitudinal direction of the hose. Said inner layer is the only layer whose length can be modified. The hose line is also characterized by a reinforcing layer ( ) which is configured to absorb the tensile forces acting on the hose in the longitudinal direction, by a compensation zone ( ) which is located between the inner layer ( ) and the reinforcing layer ( ) and which compensates the movement of these two layers in relation to one another and acts as a radial support for the inner layer ( ) on the reinforcing layer ( ); and by connecting areas ( ) for connecting the inner layer ( ) to the reinforcing layer ( ). Said areas are used to define the variable length of the inner layer ( ) as a predetermined utilization length, determined by the length of the reinforcing layer ( ) between the connecting areas ( ).

Flexible hose line, in particular, high pressure hose line which is subjected to a pressurized forming process

To convey corrosive liquids, rubber hoses are customarily provided with an inner lining that is made of a synthetic material which is resistant to solvent. In order to achieve the previously unobtainable smooth, fold-free application of the thin plastic foil against the inner rubber layer of a hose, the present invention utilizes an extremely thin-walled contractible foil sleeve that is smoothly contracted upon a rigid fabrication mandrel. This foil sleeve then forms the base for the further build-up of the hose.

Method of producing hoses with contractable inner linings

A flexible, very high pressure hose as a flexible conducting member in hydraulic systems. The wall of the hose contains filamentary load-carrying cords which are embedded in two or more layers. The load-carrying cords are combined to form a plurality of strips which cross one another or are braided with one another. The present invention deviates from the heretofore known symmetrical arrangement where the strips of a given layer have the same number of load-carrying cords in both directions, and instead provides an asymmetrical layer construction including strips which in one direction have a different number of load-carrying cords than do the strips which extend in the opposite direction. While the local resistance to pressure remains the same, the advantages of the present invention are distinct improvements, primarily in the flexibility and the service life of the novel hoses.

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Korbach, Germany

Anton Besche