Convoluted neck tube for cryogenic storage vessels
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United States of America Patent
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Feb 29, 2000
Grant Date -
N/A
app pub date -
May 9, 1997
filing date -
May 10, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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