Abstract: A pressure compensator for regulating the pressure in a bubble of liquid entirely enclosed in a forming volume of ice, atop which is a volume of gas, and which is contained in a reservoir closed by walls. The compensator includes a plunger formed of a head atop a body. The faces of the body of the plunger have a taper which is positive or zero in an essentially vertical, top to bottom direction.

Abstract: A pressure compensator for regulating the pressure in a bubble of liquid entirely enclosed in a forming volume of ice, atop which is a volume of gas, and which is contained in a reservoir closed by walls. The compensator includes a plunger formed of a head atop a body. The faces of the body of the plunger have a taper which is positive or zero in an essentially vertical, top to bottom direction.

Abstract: A system for storing an ammonia precursor including a tank configured to hold the ammonia precursor; a filler opening closed by a cap, the cap being removable for refilling the tank; and a semi-permeable membrane positioned within the cap. The semi-permeable membrane is configured to block liquid from the ammonia precursor and configured to allow air and vapors from the ammonia precursor to pass therethrough when the cap is closing the filler opening. When the cap is closing the filler opening, a pathway allowing a substantial amount of vapors to escape from the tank to the atmosphere is provided so that the total internal volume of the reservoir in liters divided by the flow rate in liters per hour through the membrane at 10 mbar is lower than 20 hours.

Abstract: A hollow body (1) comprises an accessory module (2) fastened to the wall (13) thereof by being inserted by sliding into a slide (12) formed in said wall. The module (2) comprises a housing (20) and two flat and flexible wings (23) that extend from the housing in opposite directions, the distant edges (24) of said wings extending substantially parallel and being inserted respectively into the opposite grooves (14) of the slide, and the module also comprises at least one flexible fin (25) that extends from the housing, said fin (25) being shaped so that it is bent elastically during the sliding insertion of the module (2) into the slide (12) and so that its end (26) is facing a stop member (151) of the slide when the fin is not bent and is situated beyond the end of said slide in the direction of sliding.

Abstract: A system for storing an ammonia precursor, comprising: a tank configured to hold the ammonia precursor; a filler opening closed by a cap, said cap being removable for refilling the tank; and a semi-permeable membrane positioned within said cap, wherein the semi-permeable membrane is configured to block liquid from the ammonia precursor and configured to allow air and vapors from the ammonia precursor to pass there through when the cap is closing the filler opening, and wherein when the cap is closing the filler opening, a pathway allowing a substantial amount of vapors to escape from the tank to the atmosphere is provided so that the total internal volume of the reservoir (l) divided by the flow rate through the membrane at 10 mbar (l/h) is lower than 20 h.

Abstract: A hollow body (1) comprises an accessory module (2) fastened to the wall (13) thereof by being inserted by sliding into a slide (12) formed in said wall. The module (2) comprises a housing (20) and two flat and flexible wings (23) that extend from the housing in opposite directions, the distant edges (24) of said wings extending substantially parallel and being inserted respectively into the opposite grooves (14) of the slide, and the module also comprises at least one flexible fin (25) that extends from the housing, said fin (25) being shaped so that it is bent elastically during the sliding insertion of the module (2) into the slide (12) and so that its end (26) is facing a stop member (151) of the slide when the fin is not bent and is situated beyond the end of said slide in the direction of sliding.