Abstract: A method for measuring mechanical strength of a pressurized gas storage tank for a vehicle is provided, the method including providing a tank having at least one opening, introducing an expandable element into the tank via the opening, connecting the expandable element to a pipe for a liquid, filling the expandable element with liquid, exerting a pressure, Pint, on all interior walls of the tank by means of the expandable element filled with liquid, measuring a possible deformation of the tank, emptying the liquid contained in the expandable element, and removing the expandable element from the tank via the opening. Also provided is a device for measuring mechanical strength of a pressurized gas storage tank for a vehicle.

Abstract: A process for winding a filament around a winding support. The winding support has a cylindrical shape with dome-shaped longitudinal ends and a roll axis, and is held by a holding device fixed to a base. The process includes the following, occurring in synchronization, feeding a filament, by means of at least one feeding device, towards the winding support, rotating the winding support with respect to the base around a pitch axis of the winding support, rotating unlimitedly the at least one feeding device around a yaw axis of the winding support with respect to the base, and/or rotating unlimitedly the winding support around the yaw axis of the winding support with respect to the base, and rotating unlimitedly the winding support with respect to the base around the roll axis of the winding support.

Abstract: A process for winding a filament around a winding support. The winding support has a cylindrical shape with dome-shaped longitudinal ends and a roll axis, and is held by a holding device fixed to a base. The process includes the following, occurring in synchronization, feeding a filament, by means of at least one feeding device, towards the winding support, rotating the winding support with respect to the base around a pitch axis of the winding support, rotating unlimitedly the at least one feeding device around a yaw axis of the winding support with respect to the base, and/or rotating unlimitedly the winding support around the yaw axis of the winding support with respect to the base, and rotating unlimitedly the winding support with respect to the base around the roll axis of the winding support.

Abstract: An automatic obstruction device for closing a filling circuit for filling a tank with fluid includes: a movable element movable between a non-obstruction position of the filling circuit, in which the movable element offers resistance to the fluid compatible with the filling of the tank, and an obstruction position of the filling circuit, in which the movable offers a resistance to the fluid that is incompatible with the filling of the tank; a holding element of the movable element holding the movable element in the non-obstruction position, and allowing movement of the movable element toward the obstruction position; and a first device of non-reversible movement or of non-reversible modification of the holding element allowing movement of the movable element toward the obstruction position, and being controllable by a control device.

Abstract: An automatic obstruction device for closing a filling circuit for filling a tank with fluid includes: a movable element movable between a non-obstruction position of the filling circuit, in which the movable element offers resistance to the fluid compatible with the filling of the tank, and an obstruction position of the filling circuit, in which the movable offers a resistance to the fluid that is incompatible with the filling of the tank; a holding element of the movable element holding the movable element in the non-obstruction position, and allowing movement of the movable element toward the obstruction position; and a first device of non-reversible movement or of non-reversible modification of the holding element allowing movement of the movable element toward the obstruction position, and being controllable by a control device.

Abstract: A reinforcement element, suitable for composite pressure vessel, may be configured to be inserted and to fill in a hollow shaft of a plastic liner of the composite pressure vessel, the hollow shaft connecting opposite walls of the liner. The reinforcement element may include a central part and two external parts constituted by a plurality of continuous fibres impregnated with a first resin. The central part of the reinforcement element may have a dimension substantially equal to the dimension of the hollow shaft and being a full part. The two external parts may be able to be unfolded and fixed on the external surface of opposite walls of the liner. A composite pressure vessel may include such a reinforcement element.

Abstract: A gas discharge device, for a vehicle powered by compressed gas, includes: a gas manifold having a hollow body and including at least one port configured to be in fluid communication with a compressed gas tank, and an opening for discharging gas into the atmosphere; and a pipe configured to connect the port to the compressed gas tank. The pipe is freely translatable in the port to enable a first end of the pipe to move translationally along an axis in the port.

Abstract: A method for performing pressure tests on a composite pressure vessel, including providing a composite pressure vessel with at least one opening an injection of a liquid; injecting the liquid in the composite pressure vessel through the at least one opening to reach a threshold pressure; measuring an external volume variation of the composite pressure vessel; draining the liquid from the composite pressure vessel through the at least one opening; and drying an inside cavity of the composite pressure vessel with a drying gas. The drying the inside cavity of the composite pressure vessel is performed at a pressure inside the composite pressure vessel, which is lower than an external pressure. A device for manufacturing and pressure testing a composite pressure vessel.

Abstract: The invention relates to a pressurized fluid storage and dispensing assembly (1) for a vehicle, comprising: a plurality of pressurized fluid reservoirs (3), each reservoir (3) comprising a first end piece (13) provided with at least one fluid passage duct configured for dispensing fluid from the reservoir (3) and for filling the reservoir (3), a use collector duct (5) which comprises an opening (19) for supplying and/or dispensing fluid and a plurality of orifices, each orifice being configured to be fluidically connected to a reservoir (3) via its fluid passage duct, and an electrically operated valve (7) which is arranged at one end of the use collector duct (5) and selectively closes or opens the fluid passage through the opening (19). The invention also relates to a vehicle comprising such a storage and dispensing assembly (1).

Abstract: End fitting for a pressurized fluid reservoir, the reservoir comprising a liner (2) which comprises a tubular central portion (20) with a first cylindrical outer surface (21), characterized in that the end fitting (1) comprises an end portion (10) with a second cylindrical outer surface (11), the end portion (10) being configured to be positioned coaxially with respect to the tubular central portion (20), the second cylindrical outer surface (11) forming a radially flush extension of the first cylindrical outer surface (21), the end fitting (1) being configured to be mounted in a sealed manner on the outside of a neck (22) of the liner (2) by means of an annular sealing joint (4) arranged coaxially with respect to the end portion (10) in an annular groove (12) provided in an inner recess (13) of the end fitting (1) such that the internal pressure in the reservoir has a tendency to push the neck (22) radially outwards against the annular sealing joint (4).

Abstract: An automatic obstruction device for closing a filling circuit for filling a tank with fluid includes: a movable element movable between a non-obstruction position of the filling circuit, in which the movable element offers resistance to the fluid compatible with the filling of the tank, and an obstruction position of the filling circuit, in which the movable offers a resistance to the fluid that is incompatible with the filling of the tank; a holding element of the movable element holding the movable element in the non-obstruction position, and allowing movement of the movable element toward the obstruction position; and a first device of non-reversible movement or of non-reversible modification of the holding element allowing movement of the movable element toward the obstruction position, and being controllable by a control device.

Abstract: A valve for a fluid reservoir includes an inner portion configured to be arranged inside the reservoir, the inner portion including at least one portion of a sensor for measuring at least one parameter characterizing the fluid, the valve being capable of receiving information from a computer, external to the valve, the valve also includes an outer portion configured to be arranged outside the reservoir, the outer portion having an internal computer that acquires data from the at least one sensor, communicates bidirectionally with the external computer, takes into account information received from the external computer and data from the at least one sensor for controlling at least one actuator of the valve, and measures at least one current parameter in the electrical connection.

Abstract: An internal casing for a pressurized fluid storage tank for a motor vehicle includes: a hollow body includes a layer made of a first polymer material; and a neck arranged on the hollow body and delimiting an opening of the hollow body, the neck receiving an interface part mounted on the neck in a sealed manner by a gasket arranged between the neck and the interface part. The neck is made of a composite material composed of a second polymer material loaded with reinforcing fibers, the composite material having a deformation resistance than that of the first polymer material. The neck is joined to the hollow body by molecular entanglement of polymer chains of the first polymer material and polymer chains of the second polymer material. Methods for manufacturing such an internal casing, and a storage tank including such an internal casing are disclosed.

Abstract: A plastic tank liner for the storage of a pressurized fluid includes: two ends; two elongated cylindrical sections, the two cylindrical sections having different diameters; and one connecting section connecting the two cylindrical sections. The connecting section has a concave portion connected to the cylindrical section of smaller diameter, and a convex portion adjacent to the cylindrical section of larger diameter. The convex portion has an isotensoid shape. Two convex domes are located on both ends of the plastic tank liner so that each of the domes is connected to a different cylindrical section.

Abstract: The invention relates to a gas discharge device (1) for a vehicle powered by compressed gas, comprising: —a gas manifold (11) having a hollow body and comprising: ?at least one port (12) configured to be in fluid communication with a compressed gas tank; and ?an opening (13) for discharging gas into the atmosphere; —a pipe (14) configured to connect the port (12) to a compressed gas tank; the pipe (14) being freely translatable in the port (12) to enable a first end (141) of the pipe (14) to move translationally along an axis (A) in the port (12).

Abstract: The invention relates a pressure vessel (100) configured for storing a fluid under pressure, said pressure vessel comprising: a thermoplastic liner (40) having a cylindrical section (41), a first rounded end section (42) and a second rounded end section (42); a reinforcement structure (50) made of a composite material, said reinforcement structure surrounding at least the cylindrical section of the thermoplastic liner; and a local reinforcement layer (20).

Abstract: The invention is related to a tank system for storing a high pressure gas. The invention provides a system for storing a gas, the system comprising at least two tanks, a first tank and a last tank, the first tank comprising an inlet port connected to a system inlet, the last tank comprising an outlet port connected to a system outlet, each tank being provided with an on tank valve comprising an inlet port, an outlet port, and a communication line leading into the tank, each on tank valve comprising a communication line between the inlet port and the outlet port of the on tank valve, the outlet port of the on tank valve of the first tank being connected to the inlet port of the on tank valve of the last tank, the at least two tanks being serially connected.

Abstract: A composite pressure vessel that includes a monolayer liner and a reinforcing structure arranged on top of the liner. The liner is made by injection moulding and includes at least two shells weldable together. Each shell is made of a polymer composition including at least 45% by weight of an aromatic polyamide relative to the total weight of the polymer composition, and at least 10% by weight of an aliphatic polyamide relative to the total weight of the polymer composition.