Integral pipe and fitting assembly of polymer material, and method of making same

Abstract

A hose and fitting assembly comprising a hose of a first thermoplastic polymer material having an end portion (9) with an inner surface (8) and an outer surface (15) and a fitting (3) of a second polymer material for connection with an external point of use. The fitting (3) has a central tubular projection (4) with an axial fluid passageway (6). The central tubular projection (4) has an inner wall (5) which defines the fluid passageway (6) and an outer wall (7), at least partly integrally coupled to the inner surface (8) of the end portion (9) of the hose (2). The hose and fitting assembly comprises reinforcement means (11) of a third polymer material at the periphery of the end portion (9) of the hose (2) for restraining radial deformations of the hose and providing the assembly with a good mechanical and / or hydraulic sealing capability. A method of making such assembly.

Description

FIELD OF THE INVENTION[0001]The present invention finds application in the field of flexible hoses, and particularly relates to an integral hose and fitting assembly of polymer material.[0002]The invention further relates to a method of making such hose and fitting assembly.BACKGROUND OF THE INVENTION[0003]Hose and fitting assemblies are known, specifically in the field of household appliances, industrial applications and gardening, which comprise a flexible hose of a thermoplastic polymer material and a fitting, also made from a polymer material, which is integrally associated thereto. The fitting is designed for connection to an external point of use, such as a tap, for transfer of liquids and various fluids.[0004]An example of these prior art assemblies is disclosed in European patent EP-B1-1108937 by the same Applicant.[0005]One drawback of these prior art solutions is that they do not provide an adequate mechanical and / or hydraulic sealing capability of the assembly.[0006]In te...

AI Technical Summary

Benefits of technology

[0009]The object of this invention is to overcome the above drawbacks, by providing a hose and fitting assembly that is highly efficient and relatively cost-effective.

[0010]A particular object is to provide an assembly that provides a good mechanical and / or hydraulic seal between hose and fitting.

[0011]A further object is to provide a method for making an assembly, which maximizes productivity and minimizes scrap parts.

[0014]Thanks to this particular configuration, the assembly of the invention has an excellent mechanical and / or hydraulic sealing capability.

[0015]The provision of reinforcement means at the periphery of the end portion of the hose restrains radial deformations of the hose and provides improved mechanical and / or hydraulic sealing capability as compared with prior art hose assemblies.

Problems solved by technology

One drawback of these prior art solutions is that they do not provide an adequate mechanical and / or hydraulic sealing capability of the assembly.

In terms of mechanical features, inner pressure and wear can cause radial expansions and deformations to various extents at the coupling until a “burst”, i.e. mechanical failure thereof occurs.

Also, in terms of hydraulic features, fluid leakages and dripping may occur, thereby causing flooding and increasing costs.

These drawbacks become even more serious with material ageing and wear.

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