Secondary piston seal
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United States of America Patent
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Mar 13, 2007
Grant Date -
N/A
app pub date -
Jan 14, 2005
filing date -
Jan 14, 2005
priority date (Note) -
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Abstract
A secondary seal is provided for an internal combustion engine having a piston, cylinder bore, ring seal, secondary seal, and leak path. Forces are applied from the combustion side of the piston through a cylinder gap and a leak path to the secondary seal. The secondary seal, seated on the piston and ring seal, transmits the forces generally axially to the piston and ring seal, thereby controllably limiting the radial force between the ring seal and cylinder bore.
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