Abstract: A hose that includes an inner layer and an outer layer made of an elastic polymeric material, and a textile reinforcement layer interposed between the inner and the outer layers. The inner layer and the outer layer are reciprocally coupled to form a unitary tubular member, within which the textile reinforcement layer is embedded. The unitary tubular member has an elasticity such to automatically elongate under the working pressure given by the liquid flowing therethrough to increase its original length and to automatically recover once the working pressure stops. The textile reinforcement layer is adapted to move from a rest configuration when the working pressure stops to a working configuration when the unitary tubular member elongates under the working pressure, and vice versa.

Abstract: A method for manufacturing a hose/connector assembly of polymeric material includes the steps of: providing a flexible hose of a first thermoplastic material; providing the connector of a second thermoplastic material having a hardness greater than the first thermoplastic material and a first end for coupling with a liquid source and a second end with a seat for receiving one end of the hose; translating the end of the flexible hose to engage the seat of the connector; rotating the connector to cause a rotational friction welding with the flexible hose; and periodically comparing the welding torque with the maximum allowable torque for the hose and the connector. The step of rotating the connector with respect to the hose is interrupted if the welding torque is equal to or greater than the maximum allowable torque.

Abstract: A flexible hose for transporting a fluid, particularly a flexible garden hose for transporting water, includes an outer sheath and an inner tube. The inner tube has an inner layer made of a first elastic polymeric material and an outer layer made of a second elastic polymeric material with a textile reinforcement layer embedded within the inner tube to form a unitary tubular member. The elasticity of the unitary tubular member is such that it automatically elongates under the working pressure provided by a liquid flowing therethrough and automatically recovers its original length when the working pressure stops. The textile reinforcement layer is adapted to move from a rest configuration when there is no working pressure, to a working configuration when the unitary tubular member elongates under the working pressure.

Abstract: A hose and fitting assembly includes a hose of a first thermoplastic polymer material having an end portion with an inner surface and an outer surface and a fitting of a second polymer material for connection with an external point of use. The fitting has a central tubular projection with an axial fluid passageway. The central tubular projection has an inner wall which defines the fluid passageway and an outer wall, at least partly integrally coupled to the inner surface of the end portion of the hose. The hose and fitting assembly includes a reinforcement member of a third polymer material at the periphery of the end portion of the hose 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.

Abstract: A flexible hose structure includes at least one inner tubular layer of a first polymeric material defining a longitudinal axis, at least one meshed intermediate reinforcement layer arranged on the inner layer and having at least one first series of yarns defining first chained wales and first courses arranged according to a helical progression with a first pitch of predetermined length, and at least one second series of yarns defining second chained wales and second courses arranged according to a helical progression with a second pitch of predetermined length. The first pitch is a multiple of the second pitch, and the first wales (and the second wales are mutually interlaced with respective meshes not in a chain to exert an independent resistance to radial expansion on the inner layer.

Abstract: A flexible hose structure includes at least one inner tubular layer of a first polymeric material defining a longitudinal axis, at least one meshed intermediate reinforcement layer arranged on the inner layer and having at least one first series of yarns defining first chained wales and first courses arranged according to a helical progression with a first pitch of predetermined length, and at least one second series of yarns defining second chained wales and second courses arranged according to a helical progression with a second pitch of predetermined length. The first pitch is a multiple of the second pitch, and the first wales (and the second wales are mutually interlaced with respective meshes not in a chain to exert an independent resistance to radial expansion on the inner layer.

Abstract: A hose and fitting assembly includes a hose of a first thermoplastic polymer material having an end portion with an inner surface and an outer surface and a fitting of a second polymer material for connection with an external point of use. The fitting has a central tubular projection with an axial fluid passageway. The central tubular projection has an inner wall which defines the fluid passageway and an outer wall, at least partly integrally coupled to the inner surface of the end portion of the hose. The hose and fitting assembly includes a reinforcement member of a third polymer material at the periphery of the end portion of the hose 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.

Abstract: A flexible hose, as viewed from the inside, includes at least one first inner layer made of a first thermoplastic polymer material, at least one reinforcement layer composed of a plurality of yarns knitted together to form a plurality of stitches of tricot type, and at least one second layer made of a second thermoplastic polymer material. At least one first yarn of the yarns that form the at least one reinforcement layer is a high tenacity fiber and at least one second yarn is a polyester fiber yarn or the like interwoven with the first yarn. A method of making such hose.

Abstract: A flexible hose for transporting food liquids, particularly for irrigation or the like, comprising at least one outer protective layer (2) of a first flexible polymer material and at least one inner layer (3) in direct contact with the fluid to be transported, made of a second flexible polyvinyl chloride (PVC)-containing polymer material. The second polymer material includes a plasticizer agent having as low a migration level as to maintain the flexibility of said second polymer material substantially unaltered with time. The plasticizer agent is selected from the group comprising non-phthalate additives, so that it can be non-toxic and non-polluting for the food products to be transported.

Abstract: A multilayer flexible irrigation hose includes an inner layer made of a first thermoplastic polymer material, an outer layer made of a second thermoplastic polymer material, and a first textile reinforcement layer and a second textile reinforcement layer in mutually overlapping relation. The first and second textile reinforcement layers are knitted with stitches of the tricot type, having wales of stitches and lines of stitches. The lines of stitches of said first and second textile layers have opposite inclinations to the longitudinal axis of the hose, and the wales of stitches of at least one of said first and second textile layers are substantially parallel to said longitudinal axis. A method of making said hose, a line for manufacturing same and a knitting apparatus for making such hose are also disclosed.

Abstract: A flexible hose, particularly for transporting food liquids, comprising at least one outer protective layer (2) of a first flexible polymer material (A) and at least one inner layer (3) of a second flexible polymer material (B). The second polymer material (B) comprises a thermoplastic compound (C1) of polyolefin nature and an elastomer compound (C2) in such a weight percentage as to impart a Shore A hardness of less than 85. Also, the second polymer material (B) is selected from polymer materials substantially free of liquid plasticizer agents.

Abstract: A flexible hose for transporting food liquids, particularly for irrigation or the like, comprising at least one outer protective layer (2) of a first flexible polymer material and at least one inner layer (3) in direct contact with the fluid to be transported, made of a second flexible polyvinyl chloride (PVC)-containing polymer material. The second polymer material includes a plasticizer agent having as low a migration level as to maintain the flexibility of said second polymer material substantially unaltered with time. The plasticizer agent is selected from the group comprising non-phthalate additives, so that it can be non-toxic and non-polluting for the food products to be transported.

Abstract: A reinforced flexible hose includes at least one inner tubular layer (2) of plastic or rubber, a knitted reinforcement (3), which has substantially, parallel rows (4) and lines (5) of substantially parallel stitches, with respective stitch counts per unit length of the hose (Nm, Nr); and an outer layer (6) which is superimposed on the reinforcement layer (3) to protect it. The knitted reinforcement layer (3) is provided in the form of a single tubular layer and is wrapped around the outer surface of the inner tubular layer (2); the rows (4) and lines (5) of stitches are substantially helical, with respective longitudinal pitches (Pm, Pr) and inclinations which are mutually opposite with respect to the longitudinal axis (Y).

Abstract: The invention discloses a hose (10) which comprises at least one tubular layer (3) of plastic or rubber material, a mesh-network (4) of the chain type presenting mesh lines (5) and mesh rows (6) having a tubular shape being wound on the external surface of said inner layer, a possible external layer (7), and is characterized in that said mesh rows are slanted in relation to the longitudinal axis of the hose. According to a preferred embodiment the lines (5) of said meshes are slanted in relation to the longitudinal axis Y of the hose, following a direction opposite to the direction of the mesh rows (6).