IMPROVED SEAL
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United States of America Patent
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N/A
Issued Date -
May 5, 2011
app pub date -
Jan 2, 2009
filing date -
Jan 18, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A seal arrangement includes a plurality of seal elements arranged in series. At least one seal element has a predetermined rated pressure and includes a relief arrangement permitting relief of pressure across the seal element at a predetermined level lower than said rated pressure.
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