Patent ID: 8087534

Claim:
A cryogenic storage tank comprising: a fluid-tight outer vessel; a fluid-tight inner vessel located within the outer vessel; a common access tube having a first end connected to the inner vessel and a second end cantilevered into the inner vessel, the common access tube extending substantially an entire axial length of the inner vessel thereby maximizing a heat-resisting effective length of the common access tube; a vacuum between the inner and outer vessels and within the common access tube; and at least one fluid flow line extending in a space between the inner and outer vessels and through the common access tube, the at least one fluid flow line having both corrugated and non-corrugated portions, the corrugated portions positioned outside of the common access tube at least within the inner vessel, a space receiving the corrugated portions limiting the axial length of the common access tube within the inner vessel; wherein the corrugated portion is defined by a series of sections of varying exterior dimensions of the at least one fluid flow line.