L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Bernard Simon

Daniel Delatte

Jean-Yves Faudou

Pierre P Gervais

Closing device for cryogenic container

A reservoir for a cryogenic fluid comprises a vessel with an elongated filling neck. It is thermally insulated by means of a band of thermal insulating material wound around the neck and the vessel in a plurality of superimposed layers each of which has an edge adjacent the neck and an edge remote from the neck. A cord is helically wound around the neck in a plurality of turns. Each turn of the cord contacts the adjacent edge, as defined above, of each layer.

Cryogenic reservoir with helically wound thermal insulation

First, one end of a neck tube is adhesive bonded in an outwardly diverging frustoconical orifice of an inner vessel. The other end of the neck tube is then adhesive bonded in the outwardly converging frustoconical orifice of the upper part of the outer vessel. Thereafter the lower part of the outer vessel is welded or bonded to said upper part. The resulting container is useful for storing very high or very low temperature liquids.

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Le Plessis Trevise, France

Bernard Simon