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OwnerViktor Sergeevich Ovchinnikov, Eduard Ivanovich Grigorov +6inventors
InventorsViktor Sergeevich Ovchinnikov, Eduard Ivanovich Grigorov, Arkady Lukyanovich Magdesian, Vladimir Ivanovich Gorelikov, Andrei Vasilievich Bermishev, Alexandr Stepanovich Utkin, Viktor Konstantinovich Fedotov, Vladimir Yakovlevich Volkov
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A cryostat comprising a thermally insulated vessel intended to store cryogenic products and provided with a neck tightly closed with a stopper. Between the inner surface of the neck and the stopper there a helical channel is formed through which the vapor of the cryogenic product is withdrawn to the atmosphere. The ratio of the length of the helical channel to the cross-sectional area thereof is such that the excessive vapor pressure of the evaporating cryogenic products in the vessel is eliminated while the temperature of the vapor at the outlet of the neck corresponds to the temperature of the ambient atmosphere. In this way a cryostat of 34 liter capacity can be used to store biological materials at the temperature of liquid nitrogen for at least 120 days. The proposed cryostat can be used to store biological materials at the temperature of liquid nitrogen for at least 120 days. The capacity of the cryostat is 34 liters.
A cryostat comprising a thermally insulated vessel for storing cryogenic products including a neck, said vessel being made of a material with a heat conductivity not exceeding 0.35-0.4 W/m degree and a tensile strength of 10-20 kg/mm.sup.2 ;
Dependencies are inferred from the claim text.