Ultra high vacuum seal arrangement

Patent · Tue Aug 11 04:00:00 EDT 1981

OSTI ID:5697884

Flaherty, R

Arrangement for demountably sealing two concentric metallic tubes in an ultra high vacuum system which facilitates remote actuation is claimed. 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: Department of Energy
• Patent Number(s): US 4283079
• OSTI ID: 5697884
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALLOYS
AUSTENITE
CARBON ADDITIONS
CONTROL EQUIPMENT
ELEMENTS
EQUIPMENT
HIGH VACUUM
IRON ALLOYS
MARTENSITE
METALS
NICKEL ALLOYS
NITINOL
SEALS
SERVOMECHANISMS
SHAPE MEMORY EFFECT
TEMPERATURE DEPENDENCE
TFTR REACTORS
THERMONUCLEAR REACTORS
TITANIUM ALLOYS
TOKAMAK TYPE REACTORS
TUBES