Seal assembly for a rotary earth bit
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United States of America Patent
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Sep 30, 2014
Grant Date -
Sep 16, 2010
app pub date -
Mar 16, 2009
filing date -
Mar 16, 2009
priority date (Note) -
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Abstract
An earth bit includes a cutting cone carried by a lug, and an interstice seal assembly which forms a dynamic seal with a radial interstice lug surface of the lug. The interstice seal assembly includes a rigid sealing ring having lengthened and shortened arm portions. The lengthened arm portion extends outwardly from the shortened arm portion, and engages the radial interstice lug surface.
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