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US 6,474,366 B2Granted
Flexible pipe for high pressure
AssigneeCidat S.p.A.
InventorAnnibale Bruno
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AssigneeCidat S.p.A.
InventorAnnibale Bruno
Estimating the term…
A flexible-pipe (10). for high pressure is provided with. a sublayer (11) made of natural or synthetic rubber or man-made polymers in general, and with a first and a second stiffening layer (12, 14), which are superimposed and both consist of a high-resistance metal spiral, whereby the spiral can have one or more wires. Between the first (12) and the second (14) layer there is interposed a skim coat (13) made of natural or synthetic rubber or man-made polymers in general. The flexible pipe (10) for high pressure is also coated with a coating (15) made of natural or synthetic rubber or man-made polymers in general.
A flexible pipe for high pressure, of the type provided with a sublayer which defines a passage section for a fluid under pressure, and with a first and a second stiffening layer, characterized in that said first and second stiffening layers consist of a single-layer high-resistance metal spiral which have opposite directions and are separated by a skim coat of natural or synthetic rubber or man-made polymers.
A flexible pipe for high pressure which consists essentially of a sublayer which defines a passage section for a fluid in pressure, a first and a second stiffening layer, wherein said first and second stiffening layers consist of a single-layer high-resistance metal spiral which have opposite directions and are separated by a skim coat.
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
With reinforcements embedded in the wall: comprising one or more layers of a helically wound cord or wire
Comprising one or more braided layers: two layers
Pipes
Term ended 17 Jul 2021 (estimated)
The present invention relates to a flexible pipe for high pressure.
Flexible pipes for high pressure are widespread, and they are used to transport oil or hot water or other fluids.
The present invention will make particular reference to applications of a flexible pipe for high pressure to oil transport for the hydraulic actuation of lift trucks, or to applications of a flexible pipe for transporting or conveying water in pressure in industrial water cleaning machines. In all cases, the pipe of the invention can be used for other uses besides those mentioned above.
Further features and advantages of the present invention will appear more clearly from the following description and attached drawing, provided by way of an explicative and non-limiting example. In such drawing:
FIG. 1 shows an exploded axonometry view of a flexible pipe for high pressure, according to an embodiment of the present invention.
With particular reference to the mentioned figure, the flexible pipe for high pressure according to an embodiment of the present invention is globally indicated with reference-numeral 10.
The flexible pipe for high pressure 10 exhibits a sublayer 11 made of natural or synthetic rubber or man-made polymers in general, a first layer 12 consisting of a high-resistance steel spiral, and a second layer 14, also realised with a high-resistance steel spiral. In particular, spirals can have one or more wires. The spirals of the first and of the second layers have an opposite direction.
The first layer 12 and the second layer 14 are superimposed, and a skim coat 13 is arranged between them, preferably made of natural or synthetic rubber or man-made polymers in general.