초록 ▼

A convoluted or multiple-pass neck tube joins inner and outer elements of a vacuum-jacketed vessel. The additional length of the convoluted neck tube creates an increased distance for heat to conduct from the outer to the inner vessel. As such, a convoluted neck tube can be substitute in place of a

A convoluted or multiple-pass neck tube joins inner and outer elements of a vacuum-jacketed vessel. The additional length of the convoluted neck tube creates an increased distance for heat to conduct from the outer to the inner vessel. As such, a convoluted neck tube can be substitute in place of a straight neck tube or a bellows neck tube to reduce heat gain into the inner vessel. An additional benefit achieved by the convoluted neck tube is greater flexibility of the neck tube, thus yielding more stress resistance.

대표청구항 ▼

[ The invention claimed is:] [1.] A thermal-insulated vessel comprising:an inner vessel for storing a material at a first temperature, the inner vessel having a top with an opening;an outer vessel disposed around the inner vessel and exposed to an ambient environment at a second temperature, the out

[ The invention claimed is:] [1.] A thermal-insulated vessel comprising:an inner vessel for storing a material at a first temperature, the inner vessel having a top with an opening;an outer vessel disposed around the inner vessel and exposed to an ambient environment at a second temperature, the outer vessel having a top with an opening; anda convoluted conduit having a net length bounded by a first end and a second end through which material can pass the convoluted conduit coupling the inner vessel to the outer vessel with the first end terminating at the opening in the top of the inner vessel and the second end terminating at the opening in the top of the outer vessel, the convoluted conduit providing a conductive path between the inner vessel and the outer vessel longer than the net length of the convoluted conduit.