Low heat-leak cryogenic envelope

Patent · Tue Oct 19 00:00:00 EDT 1976

OSTI ID:862670

DeHaan, James R ^[1]

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1. Boulder, CO

A plurality of cryogenic envelope sections are joined together to form a power transmission line. Each of the sections is comprised of inner and outer tubes having multilayer metalized plastic spirally wrapped within a vacuum chamber formed between the inner and outer tubes. A refrigeration tube traverses the vacuum chamber, but exits one section and enters another through thermal standoffs for reducing heat-leak from the outer tube to the refrigeration tube. The refrigeration tube passes through a spirally wrapped shield within each section's vacuum chamber in a manner so that the refrigeration tube is in close thermal contact with the shield, but is nevertheless slideable with respect thereto.

• Assignee: Cryogenic Technology, Inc. (Denver, CO)
• Patent Number(s): US 3986341
• Application Number: 05/569,473
• OSTI ID: 862670
• Country of Publication: United States
• Language: English

Related Subjects

/62/138/174/285/505/
chamber
chamber formed
close
comprised
contact
cryogenic
cryogenic envelope
enters
envelope
exits
form
formed
heat-leak
inner
joined
line
manner
metalized
multilayer
multilayer metal
nevertheless
outer
outer tube
outer tubes
passes
plastic
plurality
power
power transmission
reducing
reducing heat
refrigeration
refrigeration tube
respect
respect thereto
section
sections
shield
slideable
spirally
standoffs
thereto
thermal
thermal contact
transmission
transmission line
traverses
tube
tubes
vacuum
vacuum chamber
wrapped