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O-Ring sealing arrangements for ultra-high vacuum systems

Patent ·
OSTI ID:863941
 [1];  [2]
  1. Knoxville, TN
  2. Mt. Lebanon, PA
+ Show Author Affiliations
An all metal reusable O-ring sealing arrangement for sealing two concentric tubes in an ultra-high vacuum system. An O-ring of a heat recoverable alloy such as Nitinol is concentrically positioned between protruding sealing rings of the concentric tubes. The O-ring is installed between the tubes while in a stressed martensitic state and is made to undergo a thermally induced transformation to an austenitic state. During the transformation the O-ring expands outwardly and contracts inwardly toward a previously sized austenitic configuration, thereby sealing against the protruding sealing rings of the concentric tubes.
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 4281841
OSTI ID:
863941
Country of Publication:
United States
Language:
English

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/277/29/285/
alloy
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concentric
concentric tubes
concentrically
concentrically positioned
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contracts
expands
heat
induced
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inwardly
martensitic
metal
nitinol
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previously
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sized
stressed
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thermally
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undergo
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