Ultra high vacuum ferrofluidic seals and method of manufacture
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United States of America Patent
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Feb 22, 2005
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N/A
app pub date -
Oct 18, 2002
filing date -
Oct 18, 2001
priority date (Note) -
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Abstract
A ferrofluid seal incorporates a metal seal comprised of two knife-edges and a flat metal washer is formed between a pole piece and the housing at the axial interface between the parts. One knife edge is machined into the inner face of the housing flange and the other knife edge is machined into the opposing pole piece face. This metal seal effectively seals the pole piece to the housing with a seal suitable for ultra high vacuum applications.
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