Abstract: A pressure regulator comprises a primary fluid inlet for connection to a source of high pressure fluid, a fluid outlet for connection to a space to receive the high pressure fluid, a convergent-divergent nozzle having an upstream convergent section, a throat and a downstream divergent section, the primary fluid inlet being in fluid communication with the convergent section of the nozzle; and an outlet pipe having an upstream end arranged around but radially spaced from the outlet of the divergent section of the nozzle, the outlet pipe arranged to receive fluid flow from the outlet of the divergent section of the nozzle and conduct the fluid flowing from the nozzle to the fluid outlet.

Abstract: The valve assembly includes a tubular rigid body that can be arranged in the upper wall of a lighter gas reservoir and a hollow rod extending along a central axis from a lower end located within the tubular body to an upper end located outside the tubular body. A retaining member (R), on which the upper end of the tubular body is crimped, surrounds a cylindrical portion of the hollow rod. Movement of the hollow rod through the retaining member from a closed position to an opened position enables gas to flow from a lower hole of the valve assembly to the upper end of the hollow rod. The retaining member (R) made of synthetic resin has an annular shape with a slit that can be circumferentially expanded. This member has a reduced thickness at a contact area with crimped portion of the tubular body.

Abstract: A method and system for venting accumulations of leakage from a vehicle cryo fuel tank system, whereby elements of the tank system like lines, valves and/or a storage container for the fuel are enveloped at least partially by a capsule, the interior of the capsule is vented regularly as a function of at least one boundary condition by a pressure differential, and the exhausted gas from the capsule is treated to reduce its environmental impact. The venting may be performed using an inert gas as the rinsing medium. The gas can be burned or oxidized catalytically, and may be disposed of by a separate burner or by an internal combustion engine of the vehicle. A blower, arranged outside the capsule may generate the pressure differential. Alternatively, the pressure differential may be generated within the capsule by convective forces or a stagnation pressure generated by movement of the vehicle.

Abstract: A method and system for venting accumulations of leakage from a vehicle cryo fuel tank system, whereby elements of the tank system like lines, valves and/or a storage container for the fuel are enveloped at least partially by a capsule, the interior of the capsule is vented regularly as a function of at least one boundary condition by a pressure differential, and the exhausted gas from the capsule is treated to reduce its environmental impact. The venting may be performed using an inert gas as the rinsing medium. The gas can be burned or oxidized catalytically, and may be disposed of by a separate burner or by an internal combustion engine of the vehicle. A blower, arranged outside the capsule may generate the pressure differential. Alternatively, the pressure differential may be generated within the capsule by convective forces or a stagnation pressure generated by movement of the vehicle.

Abstract: This device comprises a closed heating chamber (36) extending through the wall (3, 4, 5) of the tank and connected to this wall, a feed pipe (22) suitable for feeding the heating chamber (36) with a heating fluid having a temperature above the temperature of the cryogenic fluid, and an exhaust pipe (23) intended for discharging the heating fluid, each of the pipes intended for discharging the heating fluid, each of the pipes (22, 23) passing through an outer wall (20) of the heating chamber (36). The device is particularly useful in the delivery of ultrapure helium.