Ultra high vacuum seal arrangement

Patent · Thu Jan 01 04:00:00 EST 1981

OSTI ID:863953

Flaherty, Robert ^[1]

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1. Mt. Lebanon, PA

Arrangement for demountably sealing two concentric metallic tubes in an ultra high vacuum system which facilitates remote actuation. A tubular seal includes integral spaced lips which circumferentially engage the metallic tubes. The lips plastically deform the metallic tubes by mechanical forces resulting from a martensite to austenite transformation of the tubular seal upon application of a predetermined temperature. The sealing force is released upon application of another temperature which causes a transformation from the stronger austenite to the weaker martensite. Use of a dual acting sealing ring and driving ring circumferentially contacting the sealing ring is particularly applicable to sealing larger diameter concentric metallic members.

• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4283079
• OSTI ID: 863953
• Country of Publication: United States
• Language: English

Related Subjects

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acting
actuation
applicable
application
arrangement
austenite
causes
circumferentially
concentric
contacting
deform
demountably
diameter
driving
dual
engage
facilitates
force
forces
integral
larger
larger diameter
lips
martensite
mechanical
mechanical force
mechanical forces
metallic
metallic tube
particularly
particularly applicable
plastically
predetermined
predetermined temperature
released
remote
resulting
seal
seal arrangement
sealing
spaced
stronger
temperature
transformation
tubes
tubular
tubular seal
ultra
vacuum
vacuum seal
weaker