Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...
Patent
1991-04-12
1993-01-26
Robinson, Ellis P.
Stock material or miscellaneous articles
Hollow or container type article
Glass, ceramic, or sintered, fused, fired, or calcined metal...
428 359, 428 362, 428 363, 428 364, 428 367, 428 3691, 428366, 428371, 428377, 428442, 428448, 428450, 428451, 428521, 428429, 428704, 428921, 138124, 138133, 138138, 138144, 138153, 138174, F16L 1108, B27N 900
Patent
active
051821478
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a hose and to a method of making such a hose. More particularly, the present invention relates to a flexible hose intended primarily, but not essentially, to carry flammable fuels and oils.
BACKGROUND OF THE INVENTION
Known hoses are generally manufactured in one of two ways. If the material employed is rubber or a synthetic rubber, the hose is generally made by extrusion or by being built-up on a rotating mandrel. In the latter case, the final step of the manufacturing process is a vulcanization stage. A hose produced from these materials may be fire-retardant but not fire-proof. A major disadvantage of such a hose is, however, the difficulty of incorporating other materials therein to vary the characteristics of the finished hose.
The problems associated with natural or synthetic rubber hoses, can, to some extent, be overcome by employing composite hoses. A composite hose, unlike a rubber hose, is built up in unvulcanised layers. Generally speaking, such a hose is produced by initially providing a wire helix which forms, effectively, a hollow internal former. Sheets of fabric and/or plastics material films are then successively wound onto the wire former. Amongst plastics materials which may be employed as the films are polypropylene, polyesters and polytetrafluoroethylene. A further helical wire is then wound around the outermost film or sheet of fabric. This outer wire helix binds the fabric layers and film layers together.
The wound layers of fabric and/or films give the composite hose thus produced greater flexibility than a hose made from natural or synthetic rubber. This is of particular advantage if the intended use of the hose is for loading and unloading petrol tankers and the like or for transferring fuels and oils between a ship and the shore. In addition to the additional flexibility, the advantages of a composite hose over a rubber hose are that it is lighter in weight, cheaper to manufacture and, depending upon the composition of the layers employed, it has a winder range of resistance to chemical corrosion. However, composite hoses have one major disadvantage compared with natural or synthetic rubber hoses. This is the extreme flammability of conventional composite hoses.
SUMMARY OF THE INVENTION
Accordingly, the present invention seeks to provide a composite hose which maintains all of the above-mentioned advantages of composite hoses over natural or synthetic rubber hoses but which is considerably more fireproof than such known composite hoses. Whilst it is impossible to guarantee that any material will be fireproof under all circumstances, the present invention seeks to provide a composite hose chiefly intended for carrying flammable materials which is sufficiently fireproof to ensure that in the event of any danger due to fire occurring, an operator has a sufficient period of time to isolate the area in which the danger has occurred.
According to the present invention there is provided a composite hose comprising an inner helical core of a metallic material, a plurality of layers of plastics material fibers and films wound on said inner core, at least one layer of glass cloth and at least one layer of aluminium foil disposed adjacent one another and wound onto the layers of plastics material fibers and/or films and an outer helical former made of metallic material wound around the layers of glass cloth and aluminium foil.
Also according to the present invention, there is provided a composite hose comprising an inner helical core of a metallic material, a plurality of layers of plastics material fibers and films wound around the helical core, at least one layer of ceramic fibers in woven or felt form wound around the plastics material layers, at least one protective layer wound around the at least one layer of ceramic fibers to protect the fibers from external damage and an outer helical former of a metallic material disposed around the at least one protective layer.
In such a case, it is preferred if at least one winding layer of a glass cloth is
REFERENCES:
patent: 3554237 (1971-01-01), Pelley
patent: 3901281 (1975-08-01), Morrisey
patent: 3980106 (1976-09-01), Wiggins
patent: 4351364 (1982-09-01), Cocks
patent: 4587145 (1986-05-01), Kanao
Dantec Ltd.
Dye Rena
Robinson Ellis P.
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