A connection system for a cryogenic tank with a tank wall formed with a first material. A connector is provided for a component to be connected to the tank. The connector is formed with a second material, and the connector is positioned on an exterior side of the tank and essentially congruent with a passage opening of the tank wall. At least one sealing element is provided, and the first and the second material have different thermal expansion coefficients. A counterpart formed with the second material is positioned on an interior side of the tank, and is connected with the connector via at least two fastening elements, such that the tank wall is clamped between the counterpart, the connector and the at least one sealing element, and a slight displaceability of the connector and the counterpart parallel to the tank wall remains to compensate for thermally induced mechanical stresses.

A high pressure tank includes: a supplying/discharging hole; and a cap having formed therein a cap-side path which is a part of a flow path. A repelling coating interposes between a liner-side end surface facing a resin-made liner, of a flange section configuring the cap, or a flange section-facing outer surface facing the flange section, of the liner. The repelling coating is formed of a material that repels a matrix resin of a fiber-reinforced resin configuring a reinforced layer.

A liner includes a covering portion that covers an inner surface over the entire circumference of the inner surface of a flange portion of a mouthpiece. A covering opposing portion, which is the inner surface of the flange portion and covered with the covering portion, includes a holding groove and a seal groove provided on the radially outer side of the flange portion than on the holding groove. At an axial cross-section of a pressure container, the holding groove is provided to extend, from a groove opening toward a groove bottom, in a direction inclined toward a radially inner side of the flange portion with respect to an axial direction of the boss portion, and the seal groove is provided to extend, from the groove opening toward the groove bottom, in a direction different from a direction in which the holding groove extends. The covering portion includes a holding rib fitted into the holding groove so as to be movable forward and backward within the holding groove, and a seal rib fitted into the seal groove.

A high-pressure container that includes a cylinder composed of a plastic, at least one half-shell composed of a plastic, a sleeve, a valve, and a seal member. The cylinder is to serve as a central member. The at least one half-shell is arranged at one axial end of the cylinder, and includes a substantially rotationally symmetrical insert as a boss member and a foot member at the end thereof facing an interior of the high-pressure container and which is embedded in the plastic of the at least one half-shell to substantially form a hollow cone or hollow cylinder. The sleeve is arranged within an inner circumference of the foot member such that the plastic of the half-shell is arranged between the sleeve and the inner circumference of the foot member. The valve is arranged in the boss member, and includes a stem portion arranged in the sleeve. The seal member includes a ring seal forming a seal between the stem portion of the valve and the sleeve.

A tank for pressurized gas such as hydrogen, comprises a paste sealant, a sealing envelope, and a base comprising a recess accommodating a neck. A substantially annular external cavity is between a convex surfaces of the neck and a concave surfaces of the recess A substantially annular inner cavity is between a concave surface of the neck and a convex surface of the recess. The paste sealant occupies the annular external and annular inner cavities uniformly and thus ensures the mechanical strength and the gas seal between the sealing envelope and the base. The sealing envelope comprises a body and a neck on the surfaces of which at least two angularly equidistant protrusions extend radially.

A method of manufacturing a high-pressure fluid vessel includes forming a first portion of a high-pressure fluid vessel with a molding process. The high-pressure fluid vessel includes a stack of capsules. Each capsule includes a first domed end, a second domed end, and a semicylindrical portion extending between and connecting the first domed end to the second domed end. The method further includes forming a second portion of a high-pressure fluid vessel with the molding process. The second portion of the high-pressure fluid vessel is positioned adjacent to the first portion of the high-pressure fluid vessel. The second portion of the high-pressure fluid vessel is welded to the first portion of the high-pressure fluid vessel.

A fluid tank includes polymeric liner comprising an upper wall and a lower wall. The upper wall and the lower wall define a cavity therebetween. A weld joint joins the upper and lower walls together. A method for assembling a fluid tank includes overlapping surfaces of an upper wall and a lower wall to form a liner defining a cavity. The method includes joining the surface of the upper wall and the surface of the lower wall together by welding to form a weld joint between the upper wall and the lower wall. The method can include cooling the weld joint to control warpage of the liner at the weld joint.

The present invention relates to improved personal flotation devices and their methods of use. Advantageously, the devices and methods of the invention eliminate the need for a pyrotechnical firing mechanism, and compared to current devices, are less apt to be spontaneously activated by deterioration that is caused by storage in a humid environment or the passage of time. Instead, the devices and methods of use of the present invention incorporate electronic circuitry to activate automatic operation.

A storage tank comprises a gas storage chamber and at least one device to hold a component in the storage chamber.

A fusible plug for a high pressure gas cylinder includes a communication hole filled with a low melting point alloy, a porous metal sintered body is press-fitted in at least a part of the communication hole in a length direction, all or a part of the porous metal sintered body is impregnated with the low melting point alloy to solidify and composite the low melting point alloy. It is preferable that: the low melting point alloy has a melting point of 110° C.; the porous metal sintered body to be press-fitted is a porous metal sintered body having pores with an area ratio of 30% or more and 50% or less and having pores with a diameter exceeding 5 μm among the pores of 80% or more in terms of area ratio to all the pores; and the porous metal sintered body is a porous austenitic stainless steel sintered body.