Abstract: A tank for a cryogenic fluid, of the type comprising an inner vessel (2) intended to receive the cryogenic fluid and delimiting, with an outer vessel (8), a space (9) for the insertion of multilayer thermal insulation (7). The tank comprises multilayer thermal insulation (7) supporting the inner vessel (2) and an outer vessel (8) without a rigid connection to the inner vessel (2).

Abstract: A device for storing gas includes at least one container (1) for gas, of the high pressure type, that has an outlet conduit with which is associated a branch (5) ensuring a closeable calibrated loss. The gas is in gaseous phase in this container over a range of pressures extending from about 40 to 250 bars and preferably from 50 to 200 bars and over a range of temperatures extending from about 15° K to 210° K and preferably from 20° K to 200° K. The device includes a thermally insulating envelope (2) in which the container (1) is disposed.

Abstract: A device for storing gas includes at least one container (1) for gas, of the high pressure type, that has an outlet conduit with which is associated a branch (5) ensuring a closeable calibrated loss. The gas is in gaseous phase in this container over a range of pressures extending from about 40 to 250 bars and preferably from 50 to 200 bars and over a range of temperatures extending from about 15° K to 210° K and preferably from 20° K to 200° K. The device includes a thermally insulating envelope (2) in which the container (1) is disposed.

Abstract: A tank for a cryogenic fluid, of the type comprising an inner vessel (2) intended to receive the cryogenic fluid and delimiting, with an outer vessel (8), a space (9) for the insertion of multilayer thermal insulation (7). The tank comprises multilayer thermal insulation (7) supporting the inner vessel (2) and an outer vessel (8) without a rigid connection to the inner vessel (2).

Abstract: The invention relates to a hood for protecting against smoke and hypoxia which is of use more particularly in the protection of flying personnel in aircraft. This hood comprises, at its base and within the fluidtight cover a closed tube (3) surrounding the neck of the wearer and containing a reserve supply of oxygen under pressure, and means (11-13) for automatically putting, when the hood is donned, the interior of this tube in communication with an automatic supply of oxygen to the wearer of the hood.

Abstract: This device, which is in particular intended to inject liquid nitrogen in preserving cans so as to pressurize them, comprises an inverted cryogenic container (1,2) having a neck (3) closed by a detachable plate (10). All the elements (11,12,14,19,21) for operating the device extend through this plate in a sealed manner. The pouring conduit (14) has a calibrated orifice (17) mounted in the plate (10) and, above the latter, an electrically-operated valve immersed in the liquid. Application in the packing of flat beverages in metal cans.

Abstract: The method comprises winding on a mandrel M a tube 1 having a flattened cross-sectional shape so as to form a helical structure, mounting on the mandrel and the tube a sheet metal cylinder 2, injecting in the tube a fluid under pressure so as to cause the tube to assume, by expansion, the shape of a coiled tube having a circular cross-sectional shape and thereby locally deform the wall of the cylinder in the shape of a helical impression, and fixing the coiled tube to the cylinder so as to produce the sleeve. The invention applies in particular to containers for cryogenic fluids provided with coiled heating tubes in an interwall space containing a vacuum between the sleeve and the internal tank.

Abstract: The invention relates to an atmospheric heater particularly for cryogenic fluids. Examples of cryogenic fluids which can be heated are liquified nitrogen and liquified oxygen.

Abstract: The present invention relates to a device for the cryogenic storing of products. In a tank, canisters are suspended via rods, and these rods rest on the rim of the tank via retaining heads. The invention is applicable to the cryogenic storage of seeds, semen, vegetable substances, etc.

Abstract: Insulating material, of compacted structure and of low thermal conductivity, is formed of silica-based primary particles; it is obtained by heat treatment of a compound of silane, of which the mean diameter is at most equal to 100 A; the apparent density .rho.a expressed in g/cc is between 6.10.sup.-3 and 2.3.10.sup.-3 d, d being the mean diameter of the primary particles expressed in A; in addition, this apparent density is at most equal to two thirds of the density of the solid material.This material is applicable as a thermal insulator in the field involving low temperatures and high temperatures and in the building sector.