Patent ID: 7448511
Filing Date: 2008-11-11
Classification: F17C

Abstract:
1. Double-wall tank for storing and shipping cryogenic media, comprising: an inner tank that contains the medium; an outer casing spaced some distance from the inner tank; an evacuated space located between the inner tank and the outer casing, such that at least one permanent magnet is installed in the evacuated space and is arranged opposite a high-temperature superconductor, so that the inner tank is supported in the casing without contact, wherein the high-temperature superconductor is located in the evacuated space, both the inner tank and the casing have a neck, and the necks are arranged concentrically to each other, and the neck of the inner tank is a helically corrugated metal tube, whose outer end is attached to the neck of the casing; and a plug made of a nonmetallic material is located inside the corrugated metal tube wherein the plug fills the inside cross section of the corrugated metal tube, so that a spiral channel is formed between the corrugated tube and the plug.