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Plug for horizontal cryostat penetration

  • US 4,535,596 A
  • Filed: 03/30/1984
  • Issued: 08/20/1985
  • Est. Priority Date: 03/30/1984
  • Status: Expired due to Fees
First Claim
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1. A plug for a horizontal penetration of a cryostat having an inner wall and an outer wall, said plug comprising:

  • an outermost, low thermal conductivity housing;

    an inner, low thermal conductivity housing disposed within said outermost housing;

    at least one intermediate high thermal conductivity housing disposed between said inner housing and said outermost housing;

    thermal insulation disposed between said inner housing and said at least one intermediate housing;

    thermal insulation disposed between said outermost housing and said at least one intermediate housing;

    said inner housing including an inner tubular extension for insertion into said cryostat penetration, said inner extension having first heat station means for fixing the temperature of at least a portion of said inner extension;

    said at least one intermediate housing including an intermediate tubular extension for insertion into said cryostat penetration, said intermediate extension having second heat station means for fixing the temperature of at least a portion of said intermediate extension;

    said outermost housing including an outermost tubular extension for insertion into said cryostat penetration, said outermost extension being sealably attached to said inner tubular extension so that the volume defined by said outermost housing and said inner housing is evacuable;

    said inner housing having pressure relief means disposed therein; and

    said outermost housing having pressure relief means disposed therein.

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