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United States of America Patent
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Jan 17, 2012
Grant Date -
Nov 26, 2009
app pub date -
May 13, 2009
filing date -
May 23, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
Seal assemblies are herein discussed. The seal assemblies can have a stiff backing ring supporting a seal ring, which is positioned adjacent an inner seal ring. In preferred embodiments, the inner seal ring is made from a material that enables the inner seal ring to absorb media particles in situ to change its particle density. This allows the seal assembly to form wearable surfaces on the fly to decrease wear on the seal ring.
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