Abstract: The actuator (10) comprises a body (12) formed by a single strip of ferromagnetic material, U-shaped and including a first and a second lateral branch (14, 16) facing each other and interconnected by an intermediate branch or portion (18). A first lateral branch (14) of the body (12) has a frustoconical formation (30) which extends in the region outside the body (12). A coil (22) is fixed in the body (12), and its axis (A-A) extends in a direction essentially orthogonal to the lateral branches (14, 16) of this body (12). A ferromagnetic core (28) is mounted so as to be translatable inside the coil (22), from a rest position to a working position, as an effect of the energizing of the coil (22). One end (32) of the core (28), facing towards the first branch (14) of said body (12), has a frustoconical shape essentially complementary to the internal shape (30b) of the formation (30). The frustoconical formation (30) of the first branch (14) of said body (12) is blind and has a planar distal bottom wall (30a).

Abstract: The actuator (10) comprises a body (12) formed by a single strip of ferromagnetic material, U-shaped and including a first and a second lateral branch (14, 16) facing each other and interconnected by an intermediate branch or portion (8). A first lateral branch (14) of the body (12) has a frustoconical formation (30) which extends in the region outside the body (12). A coil (22) is fixed in the body (12), and its axis (A-A) extends in a direction essentially orthogonal to the lateral branches (14, 16) of this body (12). A ferromagnetic core (28) is mounted so as to be translatable inside the coil (22), from a rest position to a working position, as an effect of the energising of the coil (22). One end (32) of the core (28), facing towards the first branch (14) of said body (12), has a frustoconical shape essentially complementary to the internal shape (30b) of the formation (30). The frustoconical formation (30) of the first branch (14) of said body (12) is blind and has a planar distal bottom wall (30a).

Abstract: A multilayer metallic high-pressure conduit for a high-pressure medium, particularly for a fuel injection system in motor vehicles, comprises a metallic inner tube, at least one metallic intermediate layer and a metallic outer tube. These metallic tubes or layers are connected to one another without soldering. At least one end connector element is welded to one end of the conduit.

Abstract: An automotive fluid tubing, especially for gasoline, diesel fuel or hydraulic fluid, and composed of metal can be provided with a tube coating of aluminum and then a polyamide 12 layer which is extruded onto the aluminum coating. The polyamide extruded layer greatly improves the wear-resistance and corrosion-resistance of the tubing.

Abstract: An automotive fluid tubing, especially for gasoline, diesel fuel or hydraulic fluid, and composed of metal can be provided with a tube coating of aluminum and then a polyamide 12 layer which is extruded onto the aluminum coating. The polyamide extruded layer greatly improves the wear-resistance and corrosion-resistance of the tubing.

Abstract: A pipe for pressurized-fluid feed systems, such as a diesel engine fuel pipe, has a wall of predetermined thickness with an internal surface and an external surface and an internal bore with a predetermined diameter for through-flow of the fluid. The internal surface and/or external surface are subjected to a nitriding or carbonitriding treatment, so as to obtain an increase in the hardness and/or the mechanical strength of the pipe, with regard to both stresses due to the pressure of the fluid and axial stresses due to flexing of the pipe.

Abstract: A clamp for clamping pipes, especially but not exclusively for combustion engine supply pipes, comprises a body (1) with at least two housing seats (2) which are adjacent and provided with two sidepieces (102, 202) which encompass a pipe (3) laterally. A coupling notch (4) for a catch-type distance piece (5) is provided between the adjacent sidepieces (102, 202) of two adjacent housing seats (2), the catch-type distance piece being borne by a clamping bracket (6) which can be clamped against the body (1) itself. According to the invention the catch-type distance pieces (5) and at least one of the associated external surfaces of at least one sidepiece (102, 202) have respectively at least a complementary tooth (105, 302) or respectively a tooth and a complementary reciprocal clamping notch.